{"id":420,"date":"2024-10-25T08:52:22","date_gmt":"2024-10-24T23:52:22","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=420"},"modified":"2025-03-24T08:53:16","modified_gmt":"2025-03-23T23:53:16","slug":"java%e3%81%aetry-catch%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%e8%ac%9b%e5%ba%a7%ef%bc%9a%e5%88%9d%e5%bf%83%e8%80%85%e3%81%8b%e3%82%89%e3%83%97%e3%83%ad%e3%81%be%e3%81%a7%e4%bd%bf%e3%81%84%e3%81%93","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=420","title":{"rendered":"Java\u306eTry-Catch\u30de\u30b9\u30bf\u30fc\u8b1b\u5ea7\uff1a\u521d\u5fc3\u8005\u304b\u3089\u30d7\u30ed\u307e\u3067\u4f7f\u3044\u3053\u306a\u30597\u3064\u306e\u5fc5\u9808\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"<div id=\"sgb-css-id-1\">\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">\uff11\uff0eJava\u306eTry-Catch\u3068\u306f\uff1f\u57fa\u672c\u3092\u62bc\u3055\u3048\u3088\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">1.1. \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u91cd\u8981\u6027\uff1a\u306a\u305cTry-Catch\u304c\u5fc5\u8981\u306a\u306e\u304b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">1.2. Try-Catch\u306e\u57fa\u672c\u69cb\u6587\uff1a\u30b7\u30f3\u30d7\u30eb\u306a\u4f8b\u3067\u7406\u89e3\u3059\u308b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">\uff12\uff0eTry-Catch\u306e\u4f7f\u3044\u65b9\uff1a\u30b9\u30c6\u30c3\u30d7\u30a2\u30c3\u30d7\u7de8<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">2.1. \u8907\u6570\u306e\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-5\">2.2. Finally\u7bc0\u306e\u6d3b\u7528\uff1a\u30ea\u30bd\u30fc\u30b9\u306e\u78ba\u5b9f\u306a\u89e3\u653e<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">2.3. Try-with-resources\uff1aJava 7\u4ee5\u964d\u306e\u65b0\u6a5f\u80fd<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">\uff13\uff0e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">3.1. \u9069\u5207\u306a\u7c92\u5ea6\u3067\u306eTry-Catch\u30d6\u30ed\u30c3\u30af\u306e\u8a2d\u8a08<\/a>      <\/li>      <li>        <a href=\"#i-9\">3.2. \u4f8b\u5916\u306e\u9069\u5207\u306a\u518d\u30b9\u30ed\u30fc\uff1a\u60c5\u5831\u3092\u5931\u308f\u306a\u3044\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-10\">3.3. \u30ed\u30b0\u51fa\u529b\uff1a\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u305f\u3081\u306b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">\uff14\uff0eTry-Catch\u306e\u843d\u3068\u3057\u7a74\uff1a\u3088\u304f\u3042\u308b\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u56de\u907f\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">4.1. \u7a7a\u306eCatch\u30d6\u30ed\u30c3\u30af\uff1a\u306a\u305c\u5371\u967a\u304b\u3001\u3069\u3046\u5bfe\u51e6\u3059\u3079\u304d\u304b<\/a>      <\/li>      <li>        <a href=\"#i-13\">4.2. \u4f8b\u5916\u306e\u4e38\u98f2\u307f\uff1a\u60c5\u5831\u640d\u5931\u3092\u9632\u3050\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">4.3. \u904e\u5270\u306aTry-Catch\uff1a\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">\uff15\uff0e\u5b9f\u8df5\u7684\u306aTry-Catch\u306e\u4f7f\u7528\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">5.1. \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\uff1a\u5b89\u5168\u306a\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d<\/a>      <\/li>      <li>        <a href=\"#i-17\">5.2. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\uff1a\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u9069\u5207\u306a\u7ba1\u7406<\/a>      <\/li>      <li>        <a href=\"#i-18\">5.3. \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\uff1a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3068\u63a5\u7d9a\u30a8\u30e9\u30fc\u306e\u51e6\u7406<\/a>      <\/li>      <li>        <a href=\"#i-19\">\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u304a\u3051\u308b\u30a8\u30e9\u30fc\u51e6\u7406<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-20\">\u975e\u540c\u671f\u51e6\u7406\u306b\u304a\u3051\u308b\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-21\">\uff16\uff0eTry-Catch\u3068\u30c6\u30b9\u30c8\uff1a\u54c1\u8cea\u5411\u4e0a\u306e\u305f\u3081\u306e\u30a2\u30d7\u30ed\u30fc\u30c1<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-22\">6.1. \u5358\u4f53\u30c6\u30b9\u30c8\u3067\u306eTry-Catch\u306e\u6271\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">6.2. \u4f8b\u5916\u767a\u751f\u306e\u30b7\u30ca\u30ea\u30aa\u3092\u30ab\u30d0\u30fc\u3059\u308b\u30c6\u30b9\u30c8\u8a2d\u8a08<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-24\">\uff17\uff0eJava 9\u4ee5\u964d\u306eTry-Catch\uff1a\u6700\u65b0\u306e\u6a5f\u80fd\u3068\u6539\u5584\u70b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-25\">7.1. \u3088\u308a\u52b9\u7387\u7684\u306aTry-with-resources\uff1a\u5909\u6570\u306e\u518d\u5229\u7528<\/a>      <\/li>      <li>        <a href=\"#i-26\">7.2. \u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u7d71\u5408\uff1a\u4f8b\u5916\u51e6\u7406\u306e\u65b0\u305f\u306a\u53ef\u80fd\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-27\">\u305d\u306e\u4ed6\u306e\u6539\u5584\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-28\">\uff18\uff0e\u307e\u3068\u3081\uff1a\u5805\u7262\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3078\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-29\">8.1. Try-Catch\u30de\u30b9\u30bf\u30fc\u3078\u306e5\u3064\u306e\u30b9\u30c6\u30c3\u30d7<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-30\">8.2. \u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a2\u30a4\u30c7\u30a2<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">\uff11\uff0eJava\u306eTry-Catch\u3068\u306f\uff1f\u57fa\u672c\u3092\u62bc\u3055\u3048\u3088\u3046<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>Try-Catch\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u6a5f\u80fd\u3067\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u4e2d\u306b\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u4f8b\u5916\uff08Exception\uff09\u3092\u6355\u6349\u3057\u3001\u9069\u5207\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u6a5f\u80fd\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<h3 class=\"wp-block-heading\" id=\"i-1\">1.1. \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u91cd\u8981\u6027\uff1a\u306a\u305cTry-Catch\u304c\u5fc5\u8981\u306a\u306e\u304b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u4e2d\u306b\u306f\u3001\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u306e\u4f8b<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-5\">\n<li>\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d\u4e2d\u306eI\/O\u30a8\u30e9\u30fc<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-6\">\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u306e\u5207\u65ad<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<li>\u4e0d\u6b63\u306a\u30e6\u30fc\u30b6\u30fc\u5165\u529b<\/li>\n<\/div>\n\n\n<li>\u914d\u5217\u306e\u7bc4\u56f2\u5916\u30a2\u30af\u30bb\u30b9<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\n<p>\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u51e6\u7406\u3057\u306a\u3044\u3068\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u305f\u308a\u3001\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3092\u3057\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002Try-Catch\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u308c\u3089\u306e\u4f8b\u5916\u3092\u6355\u6349\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u5206\u304b\u308a\u3084\u3059\u3044\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3057\u305f\u308a\u3001\u4ee3\u66ff\u51e6\u7406\u3092\u884c\u3063\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">1.2. Try-Catch\u306e\u57fa\u672c\u69cb\u6587\uff1a\u30b7\u30f3\u30d7\u30eb\u306a\u4f8b\u3067\u7406\u89e3\u3059\u308b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<p>Try-Catch\u306e\u57fa\u672c\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    \/\/ \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30b3\u30fc\u30c9\n} catch (ExceptionType e) {\n    \/\/ \u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n}<\/pre>\n\n\n<div id=\"sgb-css-id-12\">\n<p>\u5177\u4f53\u7684\u306a\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class SimpleTryCatchExample {\n    public static void main(String[] args) {\n        try {\n            \/\/ \u914d\u5217\u306e\u7bc4\u56f2\u5916\u30a2\u30af\u30bb\u30b9\u3092\u8a66\u307f\u308b\n            int[] numbers = {1, 2, 3};\n            System.out.println(numbers[3]); \/\/ \u3053\u306e\u884c\u3067\u4f8b\u5916\u304c\u767a\u751f\n        } catch (ArrayIndexOutOfBoundsException e) {\n            \/\/ \u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3066\u51e6\u7406\n            System.out.println(\"\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: \u914d\u5217\u306e\u7bc4\u56f2\u5916\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u307e\u3057\u305f\");\n            System.out.println(\"\u4f8b\u5916\u30e1\u30c3\u30bb\u30fc\u30b8: \" + e.getMessage());\n        }\n        System.out.println(\"\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u6b63\u5e38\u306b\u7d42\u4e86\u3057\u307e\u3057\u305f\");\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-13\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u914d\u5217\u306e\u7bc4\u56f2\u5916\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u304c\u3001Try-Catch\u30d6\u30ed\u30c3\u30af\u3067<code>ArrayIndexOutOfBoundsException<\/code>\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u30af\u30e9\u30c3\u30b7\u30e5\u305b\u305a\u306b\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-14\">\n<p>Try-Catch\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3082\u51e6\u7406\u3092\u7d99\u7d9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5805\u7262\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306aTry-Catch\u306e\u4f7f\u3044\u65b9\u3092\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-15\">\n<h2 class=\"wp-block-heading\" id=\"i-3\">\uff12\uff0eTry-Catch\u306e\u4f7f\u3044\u65b9\uff1a\u30b9\u30c6\u30c3\u30d7\u30a2\u30c3\u30d7\u7de8<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-16\">\n<p>\u57fa\u672c\u7684\u306aTry-Catch\u306e\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u8907\u6570\u306e\u4f8b\u5916\u306e\u51e6\u7406\u3001Finally\u7bc0\u306e\u6d3b\u7528\u3001\u305d\u3057\u3066Java 7\u3067\u5c0e\u5165\u3055\u308c\u305fTry-with-resources\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-17\">\n<h3 class=\"wp-block-heading\" id=\"i-4\">2.1. \u8907\u6570\u306e\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3059\u308b\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<p>\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3067\u306f\u3001\u8907\u6570\u306e\u7a2e\u985e\u306e\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002Java 7\u4ee5\u964d\u3067\u306f\u3001\u8907\u6570\u306e\u4f8b\u5916\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u30de\u30eb\u30c1\u30ad\u30e3\u30c3\u30c1\u69cb\u6587\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    \/\/ \u8907\u6570\u306e\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30b3\u30fc\u30c9\n} catch (IOException | SQLException e) {\n    \/\/ IOException\u307e\u305f\u306fSQLException\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n    System.out.println(\"\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: \" + e.getMessage());\n} catch (Exception e) {\n    \/\/ \u305d\u306e\u4ed6\u306e\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n    System.out.println(\"\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: \" + e.getMessage());\n}<\/pre>\n\n\n<div id=\"sgb-css-id-19\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>IOException<\/code>\u3068<code>SQLException<\/code>\u3092\u540c\u3058catch\u30d6\u30ed\u30c3\u30af\u3067\u51e6\u7406\u3057\u3066\u3044\u307e\u3059\u3002\u3088\u308a\u4e00\u822c\u7684\u306a<code>Exception<\/code>\u306f\u6700\u5f8c\u306b\u914d\u7f6e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u4f8b\u5916\u306e\u968e\u5c64\u69cb\u9020\u3092\u8003\u616e\u3057\u3066\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u4f8b\u5916\u3092\u5148\u306b\u51e6\u7406\u3059\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-20\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">2.2. Finally\u7bc0\u306e\u6d3b\u7528\uff1a\u30ea\u30bd\u30fc\u30b9\u306e\u78ba\u5b9f\u306a\u89e3\u653e<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-21\">\n<p>Finally\u7bc0\u306f\u3001\u4f8b\u5916\u306e\u767a\u751f\u6709\u7121\u306b\u304b\u304b\u308f\u3089\u305a\u3001\u5fc5\u305a\u5b9f\u884c\u3055\u308c\u308b\u30d6\u30ed\u30c3\u30af\u3067\u3059\u3002\u4e3b\u306b\u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\u3084\u5f8c\u51e6\u7406\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">FileInputStream fis = null;\ntry {\n    fis = new FileInputStream(\"example.txt\");\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u51e6\u7406\n} catch (IOException e) {\n    System.out.println(\"\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc: \" + e.getMessage());\n} finally {\n    if (fis != null) {\n        try {\n            fis.close(); \/\/ \u30d5\u30a1\u30a4\u30eb\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u78ba\u5b9f\u306b\u9589\u3058\u308b\n        } catch (IOException e) {\n            System.out.println(\"\u30d5\u30a1\u30a4\u30eb\u306e\u30af\u30ed\u30fc\u30ba\u306b\u5931\u6557\u3057\u307e\u3057\u305f: \" + e.getMessage());\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-22\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001<code>finally<\/code>\u30d6\u30ed\u30c3\u30af\u5185\u3067\u30d5\u30a1\u30a4\u30eb\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u78ba\u5b9f\u306b\u9589\u3058\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4f8b\u5916\u304c\u767a\u751f\u3057\u3066\u3082\u30ea\u30bd\u30fc\u30b9\u30ea\u30fc\u30af\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<h3 class=\"wp-block-heading\" id=\"i-6\">2.3. Try-with-resources\uff1aJava 7\u4ee5\u964d\u306e\u65b0\u6a5f\u80fd<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<p>Java 7\u3067\u5c0e\u5165\u3055\u308c\u305fTry-with-resources\u69cb\u6587\u306f\u3001<code>AutoCloseable<\/code>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u30ea\u30bd\u30fc\u30b9\u3092\u81ea\u52d5\u7684\u306b\u9589\u3058\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u306f\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092\u3088\u308a\u7c21\u5358\u304b\u3064\u5b89\u5168\u306b\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try (FileInputStream fis = new FileInputStream(\"example.txt\");\n     BufferedReader br = new BufferedReader(new InputStreamReader(fis))) {\n    String line;\n    while ((line = br.readLine()) != null) {\n        System.out.println(line);\n    }\n} catch (IOException e) {\n    System.out.println(\"\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc: \" + e.getMessage());\n}\n\/\/ \u30ea\u30bd\u30fc\u30b9\u306f\u81ea\u52d5\u7684\u306b\u9589\u3058\u3089\u308c\u308b\u305f\u3081\u3001finally\u30d6\u30ed\u30c3\u30af\u306f\u4e0d\u8981<\/pre>\n\n\n<div id=\"sgb-css-id-25\">\n<p>Try-with-resources\u306e\u4e3b\u306a\u5229\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#009EF3;color:#FFF\" class=\"sgb-box-simple__title\">Try-with-resources\u306e\u4e3b\u306a\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-26\">\n<li>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\uff1a\u660e\u793a\u7684\u306a<code>finally<\/code>\u30d6\u30ed\u30c3\u30af\u304c\u4e0d\u8981\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u304c\u3059\u3063\u304d\u308a\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<li>\u5b89\u5168\u6027\u306e\u5411\u4e0a\uff1a\u30ea\u30bd\u30fc\u30b9\u306e\u9589\u3058\u5fd8\u308c\u306b\u3088\u308b\u30ea\u30fc\u30af\u3092\u9632\u3052\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li>\u4f8b\u5916\u306e\u6291\u5236\uff1a\u30ea\u30bd\u30fc\u30b9\u3092\u9589\u3058\u308b\u969b\u306b\u767a\u751f\u3057\u305f\u4f8b\u5916\u306f\u6291\u5236\u3055\u308c\u3001\u5143\u306e\u4f8b\u5916\u304c\u512a\u5148\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-29\">\n<p>Java 9\u4ee5\u964d\u3067\u306f\u3001Try-with-resources\u304c\u3055\u3089\u306b\u6539\u5584\u3055\u308c\u3001\u65e2\u306b\u5ba3\u8a00\u3055\u308c\u3066\u3044\u308b\u5909\u6570\u3092\u305d\u306e\u307e\u307e\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">FileInputStream fis = new FileInputStream(\"example.txt\");\ntry (fis) {\n    \/\/ fis \u3092\u4f7f\u7528\u3057\u305f\u51e6\u7406\n} catch (IOException e) {\n    System.out.println(\"\u30a8\u30e9\u30fc: \" + e.getMessage());\n}<\/pre>\n\n\n<div id=\"sgb-css-id-30\">\n<p>\u3053\u306e\u3088\u3046\u306b\u3001Try-Catch\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u7ba1\u7406\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8907\u6570\u306e\u4f8b\u5916\u306e\u51e6\u7406\u3001Finally\u7bc0\u306e\u9069\u5207\u306a\u4f7f\u7528\u3001\u305d\u3057\u3066Try-with-resources\u306e\u6d3b\u7528\u306f\u3001\u73fe\u4ee3\u306eJava\u958b\u767a\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u30b9\u30ad\u30eb\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6280\u8853\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<h2 class=\"wp-block-heading\" id=\"i-7\">\uff13\uff0e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\n<p>\u52b9\u679c\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3001\u5805\u7262\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Try-Catch\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-33\">\n<h3 class=\"wp-block-heading\" id=\"i-8\">3.1. \u9069\u5207\u306a\u7c92\u5ea6\u3067\u306eTry-Catch\u30d6\u30ed\u30c3\u30af\u306e\u8a2d\u8a08<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<p>Try-Catch\u30d6\u30ed\u30c3\u30af\u306e\u9069\u5207\u306a\u7c92\u5ea6\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u9069\u5207\u306a\u7c92\u5ea6\u3092\u9078\u629e<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-35\">\n<li><strong>\u7d30\u304b\u3059\u304e\u308b\u7c92\u5ea6\u3092\u907f\u3051\u308b<\/strong>\uff1a\u5404\u884c\u306bTry-Catch\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30fc\u30c9\u304c\u5197\u9577\u306b\u306a\u308a\u3001\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u5927\u304d\u3059\u304e\u308b\u7c92\u5ea6\u3092\u907f\u3051\u308b<\/strong>\uff1a\u5927\u304d\u3059\u304e\u308bTry-Catch\u30d6\u30ed\u30c3\u30af\u306f\u3001\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u7279\u5b9a\u3092\u56f0\u96e3\u306b\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-36\">\n<p>\u4ee5\u4e0b\u306f\u9069\u5207\u306a\u7c92\u5ea6\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public void processUserData(String userId) {\n    User user = null;\n    try {\n        user = userRepository.findById(userId);\n        validateUser(user);\n        updateUserStatus(user);\n    } catch (UserNotFoundException e) {\n        logger.error(\"\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: {}\", userId, e);\n        throw new ServiceException(\"\u30e6\u30fc\u30b6\u30fc\u51e6\u7406\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n    } catch (ValidationException e) {\n        logger.error(\"\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u304c\u7121\u52b9\u3067\u3059: {}\", userId, e);\n        throw new ServiceException(\"\u30e6\u30fc\u30b6\u30fc\u51e6\u7406\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-37\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u95a2\u9023\u3059\u308b\u64cd\u4f5c\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3001\u9069\u5207\u306a\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-38\">\n<h3 class=\"wp-block-heading\" id=\"i-9\">3.2. \u4f8b\u5916\u306e\u9069\u5207\u306a\u518d\u30b9\u30ed\u30fc\uff1a\u60c5\u5831\u3092\u5931\u308f\u306a\u3044\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-39\">\n<p>\u4f8b\u5916\u3092\u518d\u30b9\u30ed\u30fc\u3059\u308b\u969b\u306f\u3001\u5143\u306e\u4f8b\u5916\u60c5\u5831\u3092\u4fdd\u6301\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30d0\u30c3\u30b0\u3084\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\n} catch (SQLException e) {\n    throw new DataAccessException(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n}<\/pre>\n\n\n<div id=\"sgb-css-id-40\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>SQLException<\/code>\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3001\u3088\u308a\u62bd\u8c61\u7684\u306a<code>DataAccessException<\/code>\u306b\u30e9\u30c3\u30d7\u3057\u3066\u518d\u30b9\u30ed\u30fc\u3057\u3066\u3044\u307e\u3059\u3002\u5143\u306e\u4f8b\u5916\u3092\u65b0\u3057\u3044\u4f8b\u5916\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u6e21\u3059\u3053\u3068\u3067\u3001\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u304c\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<p>\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3082\u3001\u30a8\u30e9\u30fc\u306e\u7a2e\u985e\u3092\u3088\u308a\u660e\u78ba\u306b\u8868\u73fe\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class DataAccessException extends RuntimeException {\n    public DataAccessException(String message, Throwable cause) {\n        super(message, cause);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-42\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">3.3. \u30ed\u30b0\u51fa\u529b\uff1a\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u305f\u3081\u306b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-43\">\n<p>\u9069\u5207\u306a\u30ed\u30b0\u51fa\u529b\u306f\u3001\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u7279\u5b9a\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-44\">\n<li><strong>\u30ed\u30b0\u30ec\u30d9\u30eb\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b<\/strong>\uff1a<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-45\">\n<p>\u3000\u30fbERROR\uff1a \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u52d5\u4f5c\u306b\u91cd\u5927\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u30a8\u30e9\u30fc<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p>\u3000\u30fbWARN\uff1a \u6f5c\u5728\u7684\u306a\u554f\u984c\u3084\u7570\u5e38\u306a\u72b6\u6cc1<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<p>\u3000\u30fbINFO\uff1a \u4e00\u822c\u7684\u306a\u60c5\u5831\u30ed\u30b0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-48\">\n<p>\u3000\u30fbDEBUG\uff1a \u958b\u767a\u8005\u5411\u3051\u306e\u8a73\u7d30\u306a\u60c5\u5831<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    \/\/ \u91cd\u8981\u306a\u64cd\u4f5c\n} catch (CriticalException e) {\n    logger.error(\"\u91cd\u5927\u306a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: {}\", e.getMessage(), e);\n    \/\/ \u30a8\u30e9\u30fc\u901a\u77e5\u3084\u56de\u5fa9\u51e6\u7406\n} catch (NonCriticalException e) {\n    logger.warn(\"\u8b66\u544a\uff1a\u4e88\u671f\u305b\u306c\u72b6\u6cc1\u304c\u767a\u751f\u3057\u307e\u3057\u305f: {}\", e.getMessage(), e);\n    \/\/ \u4ee3\u66ff\u51e6\u7406\u3084\u7de9\u548c\u7b56\n}<\/pre>\n\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-49\">\n<li><strong>\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u3092\u542b\u3081\u308b<\/strong>\uff1a<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-50\">\n<p>\u3000\u30fb\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u306f\u3001\u554f\u984c\u3092\u7406\u89e3\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3092\u542b\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">logger.error(\"\u30e6\u30fc\u30b6\u30fcID: {}, \u64cd\u4f5c: {}, \u30a8\u30e9\u30fc: {}\", userId, operation, e.getMessage(), e);<\/pre>\n\n\n<div id=\"sgb-css-id-51\">\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u8cea\u304c\u5411\u4e0a\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3068\u4fdd\u5b88\u6027\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u969b\u306b\u9665\u308a\u304c\u3061\u306a\u843d\u3068\u3057\u7a74\u3068\u3001\u305d\u306e\u56de\u907f\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<h2 class=\"wp-block-heading\" id=\"i-11\">\uff14\uff0eTry-Catch\u306e\u843d\u3068\u3057\u7a74\uff1a\u3088\u304f\u3042\u308b\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u56de\u907f\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-53\">\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u91cd\u8981\u3067\u3059\u304c\u3001Try-Catch\u3092\u4e0d\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3068\u3001\u4e88\u671f\u305b\u306c\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u304f\u3042\u308b\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u56de\u907f\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">4.1. \u7a7a\u306eCatch\u30d6\u30ed\u30c3\u30af\uff1a\u306a\u305c\u5371\u967a\u304b\u3001\u3069\u3046\u5bfe\u51e6\u3059\u3079\u304d\u304b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<p>\u7a7a\u306eCatch\u30d6\u30ed\u30c3\u30af\u306f\u3001\u4f8b\u5916\u3092\u7121\u8996\u3057\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u91cd\u5927\u306a\u554f\u984c\u3092\u898b\u9003\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\ntry {\n    riskyOperation();\n} catch (Exception e) {\n    \/\/ \u4f55\u3082\u3057\u306a\u3044 - \u5371\u967a\uff01\n}<\/pre>\n\n\n<div id=\"sgb-css-id-56\">\n<p>\u3053\u306e\u3088\u3046\u306a\u7a7a\u306eCatch\u30d6\u30ed\u30c3\u30af\u306f\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002\u6700\u4f4e\u9650\u3001\u4f8b\u5916\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u304b\u3001\u3088\u308a\u9069\u5207\u306a\u51e6\u7406\u3092\u884c\u3046\u3079\u304d\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6539\u5584\u4f8b\ntry {\n    riskyOperation();\n} catch (Exception e) {\n    logger.error(\"\u30ea\u30b9\u30af\u306e\u9ad8\u3044\u64cd\u4f5c\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n    \/\/ \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u884c\u3046\n}<\/pre>\n\n\n<div id=\"sgb-css-id-57\">\n<h3 class=\"wp-block-heading\" id=\"i-13\">4.2. \u4f8b\u5916\u306e\u4e38\u98f2\u307f\uff1a\u60c5\u5831\u640d\u5931\u3092\u9632\u3050\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-58\">\n<p>\u4f8b\u5916\u306e\u4e38\u98f2\u307f\uff08Exception Swallowing\uff09\u3068\u306f\u3001\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3066\u30ed\u30b0\u306b\u8a18\u9332\u305b\u305a\u306b\u51e6\u7406\u3092\u7d99\u7d9a\u3059\u308b\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u91cd\u8981\u306a\u30a8\u30e9\u30fc\u60c5\u5831\u304c\u5931\u308f\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\npublic void riskyMethod() {\n    try {\n        \/\/ \u30ea\u30b9\u30af\u306e\u9ad8\u3044\u64cd\u4f5c\n    } catch (Exception e) {\n        e.printStackTrace(); \/\/ \u6a19\u6e96\u30a8\u30e9\u30fc\u51fa\u529b\u306b\u51fa\u529b\u3059\u308b\u3060\u3051\u3067\u306f\u4e0d\u5341\u5206\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-59\">\n<p>\u4ee3\u308f\u308a\u306b\u3001\u9069\u5207\u306a\u30ed\u30b0\u8a18\u9332\u3068\u4f8b\u5916\u306e\u518d\u30b9\u30ed\u30fc\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6539\u5584\u4f8b\npublic void riskyMethod() throws CustomException {\n    try {\n        \/\/ \u30ea\u30b9\u30af\u306e\u9ad8\u3044\u64cd\u4f5c\n    } catch (Exception e) {\n        logger.error(\"\u30ea\u30b9\u30af\u306e\u9ad8\u3044\u64cd\u4f5c\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n        throw new CustomException(\"\u64cd\u4f5c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", e);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-60\">\n<p>\u3053\u306e\u6539\u5584\u4f8b\u3067\u306f\u3001\u4f8b\u5916\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3057\u3001\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306b\u30e9\u30c3\u30d7\u3057\u3066\u518d\u30b9\u30ed\u30fc\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a8\u30e9\u30fc\u60c5\u5831\u3092\u4fdd\u6301\u3057\u3064\u3064\u3001\u4e0a\u4f4d\u306e\u547c\u3073\u51fa\u3057\u5143\u306b\u554f\u984c\u3092\u901a\u77e5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-61\">\n<h3 class=\"wp-block-heading\" id=\"i-14\">4.3. \u904e\u5270\u306aTry-Catch\uff1a\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<p>\u904e\u5270\u306aTry-Catch\u30d6\u30ed\u30c3\u30af\u306e\u4f7f\u7528\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u3082\u60aa\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\uff1a\u904e\u5270\u306aTry-Catch\ntry {\n    openFile();\n    try {\n        readFile();\n        try {\n            processData();\n        } catch (DataProcessingException e) {\n            logger.error(\"\u30c7\u30fc\u30bf\u51e6\u7406\u30a8\u30e9\u30fc\", e);\n        }\n    } catch (IOException e) {\n        logger.error(\"\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc\", e);\n    }\n} catch (FileNotFoundException e) {\n    logger.error(\"\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\", e);\n}<\/pre>\n\n\n<div id=\"sgb-css-id-63\">\n<p>\u3053\u306e\u3088\u3046\u306a\u30cd\u30b9\u30c8\u3055\u308c\u305fTry-Catch\u306f\u3001\u30b3\u30fc\u30c9\u306e\u6d41\u308c\u3092\u8ffd\u3044\u306b\u304f\u304f\u3057\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3092\u56f0\u96e3\u306b\u3057\u307e\u3059\u3002\u4ee3\u308f\u308a\u306b\u3001\u4f8b\u5916\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3001\u3088\u308a\u5927\u304d\u306a\u7c92\u5ea6\u3067\u51e6\u7406\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6539\u5584\u4f8b\uff1a\u4f8b\u5916\u306e\u30b0\u30eb\u30fc\u30d7\u5316\ntry {\n    openFile();\n    readFile();\n    processData();\n} catch (FileNotFoundException e) {\n    logger.error(\"\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\", e);\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306e\u9069\u5207\u306a\u51e6\u7406\n} catch (IOException e) {\n    logger.error(\"\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u30a8\u30e9\u30fc\", e);\n    \/\/ I\/O\u30a8\u30e9\u30fc\u306e\u9069\u5207\u306a\u51e6\u7406\n} catch (DataProcessingException e) {\n    logger.error(\"\u30c7\u30fc\u30bf\u51e6\u7406\u30a8\u30e9\u30fc\", e);\n    \/\/ \u30c7\u30fc\u30bf\u51e6\u7406\u30a8\u30e9\u30fc\u306e\u9069\u5207\u306a\u51e6\u7406\n}<\/pre>\n\n\n<div id=\"sgb-css-id-64\">\n<p>\u3053\u306e\u6539\u5584\u4f8b\u3067\u306f\u3001\u95a2\u9023\u3059\u308b\u64cd\u4f5c\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u4f8b\u5916\u30bf\u30a4\u30d7\u306b\u5fdc\u3058\u305f\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u610f\u56f3\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-65\">\n<p>\u3055\u3089\u306b\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u89b3\u70b9\u304b\u3089\u3082\u3001Try-Catch\u306e\u4f7f\u7528\u306f\u614e\u91cd\u306b\u691c\u8a0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">Try-Catch\u306e\u4f7f\u7528\u306e\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-66\">\n<li><strong>\u4f8b\u5916\u306e\u4f7f\u7528\u3092\u6700\u5c0f\u9650\u306b<\/strong>\uff1a \u4f8b\u5916\u306f\u901a\u5e38\u306e\u5236\u5fa1\u30d5\u30ed\u30fc\u306b\u306f\u4f7f\u7528\u305b\u305a\u3001\u672c\u5f53\u306b\u4f8b\u5916\u7684\u306a\u72b6\u6cc1\u306b\u306e\u307f\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-67\">\n<li><strong>\u9069\u5207\u306a\u4f8b\u5916\u306e\u9078\u629e<\/strong>\uff1a \u3067\u304d\u308b\u3060\u3051\u5177\u4f53\u7684\u306a\u4f8b\u5916\u3092\u4f7f\u7528\u3057\u3001<code>Exception<\/code>\u306e\u3088\u3046\u306a\u4e00\u822c\u7684\u306a\u4f8b\u5916\u306e\u30ad\u30e3\u30c3\u30c1\u306f\u907f\u3051\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u6700\u9069\u5316<\/strong>\uff1a Java 7\u4ee5\u964d\u3067\u306f\u3001Try-with-resources\u3092\u4f7f\u7528\u3057\u3066\u30ea\u30bd\u30fc\u30b9\u306e\u81ea\u52d5\u30af\u30ed\u30fc\u30ba\u3092\u884c\u3044\u3001\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3057\u3064\u3064\u3001\u78ba\u5b9f\u306a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092\u5b9f\u73fe\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u6700\u9069\u5316\u4f8b\ntry (BufferedReader reader = new BufferedReader(new FileReader(\"example.txt\"))) {\n    String line;\n    while ((line = reader.readLine()) != null) {\n        processLine(line);\n    }\n} catch (IOException e) {\n    logger.error(\"\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc\", e);\n    \/\/ \u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\n}<\/pre>\n\n\n<div id=\"sgb-css-id-68\">\n<p>\u3053\u306e\u3088\u3046\u306b\u3001Try-Catch\u306e\u843d\u3068\u3057\u7a74\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u56de\u907f\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u539f\u5247\u3092\u5b9f\u969b\u306e\u30b7\u30ca\u30ea\u30aa\u306b\u9069\u7528\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-69\">\n<h2 class=\"wp-block-heading\" id=\"i-15\">\uff15\uff0e\u5b9f\u8df5\u7684\u306aTry-Catch\u306e\u4f7f\u7528\u4f8b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-70\">\n<p>\u3053\u308c\u307e\u3067\u306e\u7406\u8ad6\u3092\u8e0f\u307e\u3048\u3066\u3001\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u72b6\u6cc1\u3067\u306eTry-Catch\u306e\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u306e3\u3064\u306e\u91cd\u8981\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u53d6\u308a\u4e0a\u3052\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-71\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">5.1. \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\uff1a\u5b89\u5168\u306a\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<p>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306f\u3001I\/O\u4f8b\u5916\u304c\u767a\u751f\u3057\u3084\u3059\u3044\u5178\u578b\u7684\u306a\u5834\u9762\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001Try-with-resources\u3092\u4f7f\u7528\u3057\u3066\u5b89\u5168\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public List&lt;String&gt; readLinesFromFile(String filePath) {\n    List&lt;String&gt; lines = new ArrayList&lt;&gt;();\n    Path path = Paths.get(filePath);\n\n    try (BufferedReader reader = Files.newBufferedReader(path, StandardCharsets.UTF_8)) {\n        String line;\n        while ((line = reader.readLine()) != null) {\n            lines.add(line);\n        }\n    } catch (IOException e) {\n        logger.error(\"\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: {}\", filePath, e);\n        \/\/ \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u304b\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8fd4\u3059\n        throw new FileProcessingException(\"\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", e);\n    }\n\n    return lines;\n}<\/pre>\n\n\n<div id=\"sgb-css-id-73\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001Try-with-resources\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u30ea\u30fc\u30c0\u30fc\u3092\u81ea\u52d5\u7684\u306b\u30af\u30ed\u30fc\u30ba\u3057\u3001<code>IOException<\/code>\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3066\u9069\u5207\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u3053\u3068\u3067\u3001\u547c\u3073\u51fa\u3057\u5143\u306b\u554f\u984c\u3092\u901a\u77e5\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<h3 class=\"wp-block-heading\" id=\"i-17\">5.2. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\uff1a\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u9069\u5207\u306a\u7ba1\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-75\">\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3067\u306f\u3001\u63a5\u7d9a\u7ba1\u7406\u3068\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u51e6\u7406\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001Try-Catch\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092\u5b89\u5168\u306b\u884c\u3046\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public void updateUserStatus(int userId, String newStatus) {\n    String sql = \"UPDATE users SET status = ? WHERE id = ?\";\n\n    try (Connection conn = dataSource.getConnection();\n         PreparedStatement pstmt = conn.prepareStatement(sql)) {\n\n        conn.setAutoCommit(false); \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u958b\u59cb\n\n        pstmt.setString(1, newStatus);\n        pstmt.setInt(2, userId);\n        int affectedRows = pstmt.executeUpdate();\n\n        if (affectedRows == 0) {\n            throw new SQLException(\"\u30e6\u30fc\u30b6\u30fc\u306e\u66f4\u65b0\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\u30e6\u30fc\u30b6\u30fcID: \" + userId);\n        }\n\n        conn.commit(); \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30b3\u30df\u30c3\u30c8\n        logger.info(\"\u30e6\u30fc\u30b6\u30fc\u30b9\u30c6\u30fc\u30bf\u30b9\u304c\u6b63\u5e38\u306b\u66f4\u65b0\u3055\u308c\u307e\u3057\u305f\u3002\u30e6\u30fc\u30b6\u30fcID: {}\", userId);\n\n    } catch (SQLException e) {\n        logger.error(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n        throw new DatabaseException(\"\u30e6\u30fc\u30b6\u30fc\u30b9\u30c6\u30fc\u30bf\u30b9\u306e\u66f4\u65b0\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", e);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-76\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001Try-with-resources\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3068\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u81ea\u52d5\u7684\u306b\u30af\u30ed\u30fc\u30ba\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7ba1\u7406\u3092\u884c\u3044\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u9069\u5207\u306b\u30ed\u30b0\u3092\u8a18\u9332\u3057\u3001\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-77\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">5.3. \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\uff1a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3068\u63a5\u7d9a\u30a8\u30e9\u30fc\u306e\u51e6\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-78\">\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u3067\u306f\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3084\u63a5\u7d9a\u30a8\u30e9\u30fc\u306a\u3069\u3001\u69d8\u3005\u306a\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001HTTP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u305f\u5b89\u5168\u306aAPI\u547c\u3073\u51fa\u3057\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public String fetchDataFromApi(String apiUrl) {\n    HttpClient client = HttpClient.newBuilder()\n        .connectTimeout(Duration.ofSeconds(10))\n        .build();\n\n    HttpRequest request = HttpRequest.newBuilder()\n        .uri(URI.create(apiUrl))\n        .timeout(Duration.ofSeconds(30))\n        .GET()\n        .build();\n\n    try {\n        HttpResponse&lt;String&gt; response = client.send(request, HttpResponse.BodyHandlers.ofString());\n\n        if (response.statusCode() == 200) {\n            return response.body();\n        } else {\n            throw new ApiException(\"API\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u5931\u6557\u3057\u307e\u3057\u305f\u3002\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9: \" + response.statusCode());\n        }\n    } catch (IOException e) {\n        logger.error(\"\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n        throw new NetworkException(\"API\u3068\u306e\u901a\u4fe1\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n    } catch (InterruptedException e) {\n        logger.error(\"API\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u4e2d\u65ad\u3055\u308c\u307e\u3057\u305f\", e);\n        Thread.currentThread().interrupt(); \/\/ \u5272\u308a\u8fbc\u307f\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u518d\u8a2d\u5b9a\n        throw new NetworkException(\"API\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u4e2d\u65ad\u3055\u308c\u307e\u3057\u305f\", e);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-79\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u63a5\u7d9a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3068\u30ea\u30af\u30a8\u30b9\u30c8\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u8a2d\u5b9a\u3057\u3001<code>IOException<\/code>\u3068<code>InterruptedException<\/code>\u3092\u500b\u5225\u306b\u51e6\u7406\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001HTTP\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3001API\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u51e6\u7406\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-80\">\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u901a\u3058\u3066\u3001\u4ee5\u4e0b\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5b9f\u8df5\u7684\u306a\u4f8b\u306b\u3088\u308b\u4f8b\u5916\u306e\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-81\">\n<li><strong>\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406<\/strong>\uff1a Try-with-resources\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ea\u30bd\u30fc\u30b9\u3092\u9069\u5207\u306b\u7ba1\u7406\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-82\">\n<li><strong>\u7d30\u5206\u5316\u3055\u308c\u305f\u4f8b\u5916\u51e6\u7406<\/strong>\uff1a \u5404\u30b7\u30ca\u30ea\u30aa\u306b\u7279\u5316\u3057\u305f\u4f8b\u5916\uff08<code>FileProcessingException<\/code>, <code>DatabaseException<\/code>, <code>NetworkException<\/code>, <code>ApiException<\/code>\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u30a8\u30e9\u30fc\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-83\">\n<li><strong>\u30ed\u30b0\u8a18\u9332<\/strong>\uff1a \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u969b\u306b\u9069\u5207\u306a\u30ed\u30b0\u3092\u8a18\u9332\u3057\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u5bb9\u6613\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\n<li><strong>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7ba1\u7406<\/strong>\uff1a \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3067\u306f\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u9069\u5207\u306b\u958b\u59cb\u3057\u3001\u30b3\u30df\u30c3\u30c8\u307e\u305f\u306f\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-85\">\n<li><strong>\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u8a2d\u5b9a<\/strong>\uff1a \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u3067\u306f\u3001\u63a5\u7d9a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3068\u30ea\u30af\u30a8\u30b9\u30c8\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u7121\u9650\u5f85\u6a5f\u3092\u9632\u3044\u3067\u3044\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u5272\u308a\u8fbc\u307f\u51e6\u7406<\/strong>\uff1a <code>InterruptedException<\/code>\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u305f\u969b\u306b\u3001\u5272\u308a\u8fbc\u307f\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u518d\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-87\">\n<p>\u3053\u308c\u3089\u306e\u4f8b\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3092\u60f3\u5b9a\u3057\u305f\u3082\u306e\u3067\u3059\u304c\u3001\u3055\u3089\u306b\u8907\u96d1\u306a\u30b7\u30ca\u30ea\u30aa\u3082\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-88\">\n<p>\u4ee5\u4e0b\u306b\u305d\u306e\u8907\u96d1\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u304a\u3051\u308b\u30a8\u30e9\u30fc\u51e6\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-90\">\n<p>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306f\u3001\u8907\u6570\u306e\u30b5\u30fc\u30d3\u30b9\u9593\u306e\u901a\u4fe1\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u306f\u3088\u308a\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public String callUserService(int userId) {\n    CircuitBreaker circuitBreaker = circuitBreakerFactory.create(\"userService\");\n\n    try {\n        return circuitBreaker.run(() -&gt; userServiceClient.getUserInfo(userId),\n            throwable -&gt; fallbackForUserInfo(userId, throwable));\n    } catch (Exception e) {\n        logger.error(\"\u30e6\u30fc\u30b6\u30fc\u30b5\u30fc\u30d3\u30b9\u306e\u547c\u3073\u51fa\u3057\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n        throw new ServiceException(\"\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u306e\u53d6\u5f97\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", e);\n    }\n}\n\nprivate String fallbackForUserInfo(int userId, Throwable throwable) {\n    logger.warn(\"\u30e6\u30fc\u30b6\u30fc\u30b5\u30fc\u30d3\u30b9\u304c\u30c0\u30a6\u30f3\u3057\u3066\u3044\u307e\u3059\u3002\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059\", throwable);\n    return \"\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u306f\u73fe\u5728\u5229\u7528\u3067\u304d\u307e\u305b\u3093\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-91\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u9593\u306e\u901a\u4fe1\u3092\u5236\u5fa1\u3057\u3066\u3044\u307e\u3059\u3002\u30b5\u30fc\u30d3\u30b9\u304c\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u3084\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u3001\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u30c7\u30b0\u30ec\u30fc\u30c9\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u975e\u540c\u671f\u51e6\u7406\u306b\u304a\u3051\u308b\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\n<p>\u975e\u540c\u671f\u51e6\u7406\u3067\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3082\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001<code>CompletableFuture<\/code>\u3092\u4f7f\u7528\u3057\u305f\u975e\u540c\u671f\u51e6\u7406\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public CompletableFuture&lt;String&gt; processDataAsync(String data) {\n    return CompletableFuture.supplyAsync(() -&gt; {\n        try {\n            \/\/ \u9577\u6642\u9593\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n            return processData(data);\n        } catch (Exception e) {\n            logger.error(\"\u30c7\u30fc\u30bf\u51e6\u7406\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\", e);\n            throw new CompletionException(e);\n        }\n    }).exceptionally(ex -&gt; {\n        logger.warn(\"\u975e\u540c\u671f\u51e6\u7406\u304c\u5931\u6557\u3057\u307e\u3057\u305f\", ex);\n        return \"\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\";\n    });\n}<\/pre>\n\n\n<div id=\"sgb-css-id-94\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u975e\u540c\u671f\u30bf\u30b9\u30af\u5185\u3067\u767a\u751f\u3057\u305f\u4f8b\u5916\u3092<code>CompletionException<\/code>\u3067\u30e9\u30c3\u30d7\u3057\u3001<code>exceptionally<\/code>\u30e1\u30bd\u30c3\u30c9\u3067\u4f8b\u5916\u3092\u51e6\u7406\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u901a\u3058\u3066\u3001\u69d8\u3005\u306a\u72b6\u6cc1\u3067\u306eTry-Catch\u306e\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u3002\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3068\u56de\u5fa9\u529b\u3092\u9ad8\u3081\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u6280\u8853\u3092\u30c6\u30b9\u30c8\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u63a2\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<h2 class=\"wp-block-heading\" id=\"i-21\">\uff16\uff0eTry-Catch\u3068\u30c6\u30b9\u30c8\uff1a\u54c1\u8cea\u5411\u4e0a\u306e\u305f\u3081\u306e\u30a2\u30d7\u30ed\u30fc\u30c1<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5\u3060\u3051\u3067\u306a\u304f\u3001\u305d\u306e\u6b63\u78ba\u6027\u3068\u52b9\u679c\u3092\u30c6\u30b9\u30c8\u3059\u308b\u3053\u3068\u3082\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u9069\u5207\u306a\u30c6\u30b9\u30c8\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3057\u3001\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3092\u9632\u3050\u4e0a\u3067\u6b20\u304b\u305b\u307e\u305b\u3093\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Try-Catch\u3092\u542b\u3080\u30b3\u30fc\u30c9\u306e\u30c6\u30b9\u30c8\u65b9\u6cd5\u3068\u3001\u54c1\u8cea\u5411\u4e0a\u306e\u305f\u3081\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<h3 class=\"wp-block-heading\" id=\"i-22\">6.1. \u5358\u4f53\u30c6\u30b9\u30c8\u3067\u306eTry-Catch\u306e\u6271\u3044\u65b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<p>\u5358\u4f53\u30c6\u30b9\u30c8\u3067\u306f\u3001\u6b63\u5e38\u7cfb\u3060\u3051\u3067\u306a\u304f\u3001\u7570\u5e38\u7cfb\uff08\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u30b1\u30fc\u30b9\uff09\u3082\u78ba\u5b9f\u306b\u30c6\u30b9\u30c8\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002JUnit\u3092\u4f7f\u7528\u3057\u305f\u4f8b\u5916\u30c6\u30b9\u30c8\u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import org.junit.jupiter.api.Test;\nimport static org.junit.jupiter.api.Assertions.*;\n\npublic class FileReaderTest {\n\n    @Test\n    void testReadFile_FileNotFound() {\n        FileReader reader = new FileReader();\n\n        assertThrows(FileNotFoundException.class, () -&gt; {\n            reader.readFile(\"non_existent_file.txt\");\n        });\n    }\n\n    @Test\n    void testReadFile_IOError() {\n        FileReader reader = new FileReader();\n\n        Exception exception = assertThrows(IOException.class, () -&gt; {\n            reader.readFile(\"corrupt_file.txt\");\n        });\n\n        String expectedMessage = \"\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f\";\n        String actualMessage = exception.getMessage();\n        assertTrue(actualMessage.contains(expectedMessage));\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-100\">\n<p>\u3053\u308c\u3089\u306e\u30c6\u30b9\u30c8\u3067\u306f\u3001<code>assertThrows<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u7279\u5b9a\u306e\u4f8b\u5916\u304c\u6295\u3052\u3089\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u4f8b\u5916\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u5185\u5bb9\u3082\u691c\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-101\">\n<h3 class=\"wp-block-heading\" id=\"i-23\">6.2. \u4f8b\u5916\u767a\u751f\u306e\u30b7\u30ca\u30ea\u30aa\u3092\u30ab\u30d0\u30fc\u3059\u308b\u30c6\u30b9\u30c8\u8a2d\u8a08<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<p>\u52b9\u679c\u7684\u306a\u30c6\u30b9\u30c8\u8a2d\u8a08\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u52b9\u679c\u7684\u306a\u30c6\u30b9\u30c8\u8a2d\u8a08\u3067\u8003\u616e\u3059\u308b\u30b7\u30ca\u30ea\u30aa<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-103\">\n<li><strong>\u5883\u754c\u5024\u30c6\u30b9\u30c8<\/strong>\uff1a \u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3084\u6975\u7aef\u306a\u5165\u529b\u5024\u3067\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-104\">\n<li><strong>null\u5024\u306e\u51e6\u7406<\/strong>\uff1a null\u304c\u6e21\u3055\u308c\u305f\u5834\u5408\u306e\u6319\u52d5\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<li><strong>\u30ea\u30bd\u30fc\u30b9\u67af\u6e07<\/strong>\uff1a \u30e1\u30e2\u30ea\u4e0d\u8db3\u3084\u63a5\u7d9a\u30d7\u30fc\u30eb\u306e\u67af\u6e07\u306a\u3069\u306e\u72b6\u6cc1\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8<\/strong>\uff1a \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9045\u5ef6\u3084\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306a\u3069\u306b\u3088\u308b\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-106\">\n<p>\u4ee5\u4e0b\u306f\u3001\u30e2\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u30c6\u30b9\u30c8\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import org.junit.jupiter.api.Test;\nimport org.mockito.Mockito;\nimport static org.junit.jupiter.api.Assertions.*;\nimport static org.mockito.Mockito.*;\n\nclass UserServiceTest {\n\n    @Test\n    void testUpdateUser_DatabaseTimeout() {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u30e2\u30c3\u30af\n        Connection mockConnection = mock(Connection.class);\n        DataSource mockDataSource = mock(DataSource.class);\n\n        try {\n            when(mockDataSource.getConnection()).thenThrow(new SQLTimeoutException(\"\u63a5\u7d9a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\"));\n        } catch (SQLException e) {\n            fail(\"\u30e2\u30c3\u30af\u306e\u8a2d\u5b9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n        }\n\n        UserService userService = new UserService(mockDataSource);\n\n        assertThrows(DatabaseException.class, () -&gt; {\n            userService.updateUser(1, \"\u65b0\u3057\u3044\u540d\u524d\");\n        });\n\n        \/\/ \u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u547c\u3073\u51fa\u3055\u308c\u305f\u3053\u3068\u3092\u78ba\u8a8d\n        try {\n            verify(mockConnection, times(1)).rollback();\n        } catch (SQLException e) {\n            fail(\"\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u306e\u691c\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-107\">\n<p>\u3053\u306e\u30c6\u30b9\u30c8\u3067\u306f\u3001Mockito\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u3001\u9069\u5207\u306a\u4f8b\u5916\u304c\u6295\u3052\u3089\u308c\u308b\u3053\u3068\u3068\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-108\">\n<p>\u30c6\u30b9\u30c8\u30ab\u30d0\u30ec\u30c3\u30b8\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30b3\u30fc\u30c9\u306e\u30ab\u30d0\u30ec\u30c3\u30b8\u3092\u6e2c\u5b9a\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002\u305f\u3060\u3057\u3001100%\u306e\u30ab\u30d0\u30ec\u30c3\u30b8\u3092\u76ee\u6307\u3059\u306e\u3067\u306f\u306a\u304f\u3001\u91cd\u8981\u306a\u30b7\u30ca\u30ea\u30aa\u3068\u5883\u754c\u6761\u4ef6\u3092\u30ab\u30d0\u30fc\u3059\u308b\u3053\u3068\u306b\u91cd\u70b9\u3092\u7f6e\u304f\u3079\u304d\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-109\">\n<p>\u9069\u5207\u306a\u30c6\u30b9\u30c8\u8a2d\u8a08\u3068\u5b9f\u88c5\u306b\u3088\u308a\u3001Try-Catch\u3092\u542b\u3080\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30b3\u30fc\u30c9\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u306e\u54c1\u8cea\u5411\u4e0a\u306b\u3064\u306a\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<h2 class=\"wp-block-heading\" id=\"i-24\">\uff17\uff0eJava 9\u4ee5\u964d\u306eTry-Catch\uff1a\u6700\u65b0\u306e\u6a5f\u80fd\u3068\u6539\u5584\u70b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<p>Java\u8a00\u8a9e\u306f\u5e38\u306b\u9032\u5316\u3092\u7d9a\u3051\u3066\u304a\u308a\u3001Try-Catch\u306b\u95a2\u9023\u3059\u308b\u6a5f\u80fd\u3082\u4f8b\u5916\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002Java 9\u4ee5\u964d\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u95a2\u3059\u308b\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u6539\u5584\u304c\u884c\u308f\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u7406\u89e3\u3057\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7c21\u6f54\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-112\">\n<h3 class=\"wp-block-heading\" id=\"i-25\">7.1. \u3088\u308a\u52b9\u7387\u7684\u306aTry-with-resources\uff1a\u5909\u6570\u306e\u518d\u5229\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-113\">\n<p>Java 9\u3067\u306f\u3001Try-with-resources\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u304c\u6539\u5584\u3055\u308c\u3001\u65e2\u306b\u5ba3\u8a00\u3055\u308c\u305f\u5909\u6570\u3092\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u5197\u9577\u6027\u304c\u6e1b\u5c11\u3057\u3001\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<p>Java 8\u307e\u3067\u306e\u66f8\u304d\u65b9\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">BufferedReader reader = new BufferedReader(new FileReader(\"file.txt\"));\ntry (BufferedReader r = reader) {\n    \/\/ \u30ea\u30bd\u30fc\u30b9\u3092\u4f7f\u7528\n}<\/pre>\n\n\n<div id=\"sgb-css-id-115\">\n<p>Java 9\u4ee5\u964d\u306e\u66f8\u304d\u65b9\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">BufferedReader reader = new BufferedReader(new FileReader(\"file.txt\"));\ntry (reader) {\n    \/\/ \u30ea\u30bd\u30fc\u30b9\u3092\u4f7f\u7528\n}<\/pre>\n\n\n<div id=\"sgb-css-id-116\">\n<p>\u3053\u306e\u6539\u5584\u306b\u3088\u308a\u3001\u65e2\u5b58\u306e\u5909\u6570\u3092\u76f4\u63a5Try-with-resources\u30d6\u30ed\u30c3\u30af\u3067\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u304c\u3088\u308a\u3059\u3063\u304d\u308a\u3057\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<h3 class=\"wp-block-heading\" id=\"i-26\">7.2. \u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u7d71\u5408\uff1a\u4f8b\u5916\u51e6\u7406\u306e\u65b0\u305f\u306a\u53ef\u80fd\u6027<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-118\">\n<p>Java 9\u3067\u5c0e\u5165\u3055\u308c\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\uff08Project Jigsaw\uff09\u306f\u3001\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u69cb\u9020\u5316\u3068\u30ab\u30d7\u30bb\u30eb\u5316\u3092\u6539\u5584\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u3082\u5f71\u97ff\u3092\u4e0e\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-119\">\n<li><strong>\u30e2\u30b8\u30e5\u30fc\u30eb\u56fa\u6709\u306e\u4f8b\u5916<\/strong>\uff1a \u30e2\u30b8\u30e5\u30fc\u30eb\u5185\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u3001\u305d\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u516c\u958bAPI\u306e\u4e00\u90e8\u3068\u3057\u3066\u660e\u793a\u7684\u306b\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div><\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">module com.myapp.core {\n    exports com.myapp.core.exception;\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-120\">\n<li><strong>\u4f8b\u5916\u306e\u5c01\u3058\u8fbc\u3081<\/strong>\uff1a \u30e2\u30b8\u30e5\u30fc\u30eb\u5185\u90e8\u3067\u4f7f\u7528\u3055\u308c\u308b\u4f8b\u5916\u3092\u5916\u90e8\u306b\u6f0f\u3089\u3055\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3001API\u306e\u5b89\u5b9a\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div><\/ol>\n\n\n<div id=\"sgb-css-id-121\">\n<h3 class=\"wp-block-heading\" id=\"i-27\">\u305d\u306e\u4ed6\u306e\u6539\u5584\u70b9<\/h3>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-122\">\n<li><strong>Java 10\uff1a \u5c40\u6240\u5909\u6570\u578b\u63a8\u8ad6\uff08var\uff09<\/strong><\/li>\n<\/div><\/ol>\n\n\n<div id=\"sgb-css-id-123\">\n<p><code>var<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001Try-Catch\u30d6\u30ed\u30c3\u30af\u5185\u3067\u3082\u578b\u63a8\u8ad6\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    var connection = DriverManager.getConnection(url, user, password);\n    \/\/ connection\u306e\u578b\u306fConnection\u3068\u3057\u3066\u63a8\u8ad6\u3055\u308c\u308b\n} catch (SQLException e) {\n    \/\/ \u30a8\u30e9\u30fc\u51e6\u7406\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-124\">\n<li><strong>Java 14\uff1a \u30b9\u30a4\u30c3\u30c1\u5f0f\u3068\u4f8b\u5916\u51e6\u7406\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong><\/li>\n<\/div><\/ol>\n\n\n<div id=\"sgb-css-id-125\">\n<p>\u30b9\u30a4\u30c3\u30c1\u5f0f\u3092\u4f7f\u7528\u3057\u3066\u3001\u3088\u308a\u7c21\u6f54\u306a\u4f8b\u5916\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">int result = switch (obj) {\n    case Integer i -&gt; i;\n    case String s -&gt; Integer.parseInt(s);\n    default -&gt; throw new IllegalArgumentException(\"Unsupported type\");\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-126\">\n<li><strong>Java 16\u4ee5\u964d\uff1a \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068instanceof\u306e\u6539\u5584<\/strong><\/li>\n<\/div><\/ol>\n\n\n<div id=\"sgb-css-id-127\">\n<p>\u4f8b\u5916\u51e6\u7406\u306b\u304a\u3044\u3066\u3082\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    \/\/ \u4f55\u3089\u304b\u306e\u51e6\u7406\n} catch (Exception e) {\n    if (e instanceof SQLException sql &amp;&amp; sql.getSQLState().equals(\"23505\")) {\n        System.out.println(\"\u4e00\u610f\u5236\u7d04\u9055\u53cd: \" + sql.getMessage());\n    } else {\n        throw e;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-128\">\n<p>\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3068\u6539\u5584\u70b9\u306b\u3088\u308a\u3001Java\u958b\u767a\u8005\u306f\u3088\u308a\u30af\u30ea\u30fc\u30f3\u3067\u52b9\u7387\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u6700\u65b0\u306eJava\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3068\u4fdd\u5b88\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-129\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u307e\u3067\u306b\u5b66\u3093\u3060\u5185\u5bb9\u3092\u7dcf\u62ec\u3057\u3001\u5805\u7262\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3078\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u3092\u63d0\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<h2 class=\"wp-block-heading\" id=\"i-28\">\uff18\uff0e\u307e\u3068\u3081\uff1a\u5805\u7262\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3078\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-131\">\n<p>\u3053\u3053\u307e\u3067\u3001Java\u306eTry-Catch\u3092\u4e2d\u5fc3\u3068\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u5e45\u5e83\u304f\u5b66\u3093\u3067\u304d\u307e\u3057\u305f\u3002\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3001\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u4e0a\u3067\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u7dcf\u62ec\u3057\u3001\u3055\u3089\u306a\u308b\u5b66\u7fd2\u3068\u5b9f\u8df5\u306e\u305f\u3081\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u3092\u63d0\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-132\">\n<h3 class=\"wp-block-heading\" id=\"i-29\">8.1. Try-Catch\u30de\u30b9\u30bf\u30fc\u3078\u306e5\u3064\u306e\u30b9\u30c6\u30c3\u30d7<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-137\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30de\u30b9\u30bf\u30fc\u3078\u306e5\u30b9\u30c6\u30c3\u30d7<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-133\">\n<li><strong>\u57fa\u672c\u3092\u5b8c\u5168\u306b\u7406\u89e3\u3059\u308b<\/strong>\uff1a Try-Catch\u306e\u57fa\u672c\u69cb\u6587\u3001\u4f8b\u5916\u306e\u968e\u5c64\u3001\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3068\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-134\">\n<li><strong>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7fd2\u5f97\u3059\u308b<\/strong>\uff1a \u9069\u5207\u306a\u7c92\u5ea6\u3067\u306eTry-Catch\u30d6\u30ed\u30c3\u30af\u306e\u8a2d\u8a08\u3001\u4f8b\u5916\u306e\u9069\u5207\u306a\u518d\u30b9\u30ed\u30fc\u3001\u52b9\u679c\u7684\u306a\u30ed\u30b0\u8a18\u9332\u306a\u3069\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u8eab\u306b\u3064\u3051\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-135\">\n<li><strong>\u5b9f\u8df5\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u7d4c\u9a13\u3092\u7a4d\u3080<\/strong>\uff1a \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u306a\u3069\u3001\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3092\u60f3\u5b9a\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u8df5\u3059\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-136\">\n<li><strong>\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\u3092\u53d6\u308a\u5165\u308c\u308b<\/strong>\uff1a \u5358\u4f53\u30c6\u30b9\u30c8\u3092\u901a\u3058\u3066\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30ed\u30b8\u30c3\u30af\u3092\u691c\u8a3c\u3057\u3001\u54c1\u8cea\u3092\u5411\u4e0a\u3055\u305b\u308b\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u6700\u65b0\u306e\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b<\/strong>\uff1a Java 9\u4ee5\u964d\u306b\u5c0e\u5165\u3055\u308c\u305f\u65b0\u6a5f\u80fd\u3084\u6539\u5584\u70b9\u3092\u5b66\u3073\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u6280\u8853\u3092\u78e8\u304f\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-138\">\n<h3 class=\"wp-block-heading\" id=\"i-30\">8.2. \u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a2\u30a4\u30c7\u30a2<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-139\">\n<li>\u66f8\u7c4d\uff1a \u201cEffective Java\u201d by Joshua Bloch<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-140\">\n<li>\u30aa\u30f3\u30e9\u30a4\u30f3\u30b3\u30fc\u30b9\uff1a Coursera\u3001Udemy\u306a\u3069\u3067\u63d0\u4f9b\u3055\u308c\u3066\u3044\u308bJava\u4e2d\u7d1a\u30fb\u4e0a\u7d1a\u30b3\u30fc\u30b9<\/li>\n<\/div>\n\n\n<li>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff1a Oracle Java Documentation<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-144\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a2\u30a4\u30c7\u30a2<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-142\">\n<li><strong>\u30d5\u30a1\u30a4\u30eb\u5909\u63db\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3<\/strong>\uff1a \u69d8\u3005\u306a\u5f62\u5f0f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u3001\u5909\u63db\u3057\u3066\u51fa\u529b\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3084\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30a8\u30e9\u30fc\u306e\u51e6\u7406\u3092\u5b9f\u8df5\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-143\">\n<li><strong>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30c0\u30a6\u30f3\u30ed\u30fc\u30c0\u30fc<\/strong>\uff1a \u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u4e26\u884c\u3057\u3066\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3057\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3001\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u5b9f\u8df5\u306b\u6700\u9069\u3067\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb<\/strong>\uff1a \u8907\u6570\u306e\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u306e\u5065\u5168\u6027\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u554f\u984c\u3092\u691c\u51fa\u3057\u3066\u5831\u544a\u3059\u308b\u30c4\u30fc\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u5206\u6563\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b66\u3079\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3001\u5358\u306a\u308b\u6280\u8853\u7684\u306a\u30b9\u30ad\u30eb\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u308c\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4fe1\u983c\u6027\u3001\u305d\u3057\u3066\u958b\u767a\u8005\u306e\u751f\u7523\u6027\u306b\u76f4\u63a5\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u6280\u8853\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b9f\u8df5\u3057\u3001\u7d99\u7d9a\u7684\u306b\u5b66\u7fd2\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u529b\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\n<p>\u6700\u5f8c\u306b\u3001Java\u8a00\u8a9e\u306f\u4eca\u5f8c\u3082\u9032\u5316\u3092\u7d9a\u3051\u308b\u3067\u3057\u3087\u3046\u3002\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u62e1\u5f35\u3084\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306a\u4f8b\u5916\u51e6\u7406\u69cb\u6587\u306a\u3069\u3001\u5c06\u6765\u7684\u306a\u6539\u5584\u3082\u671f\u5f85\u3055\u308c\u307e\u3059\u3002\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3078\u306e\u53c2\u52a0\u3084\u6700\u65b0\u306eJava\u4ed5\u69d8\u306e\u8ffd\u8de1\u3092\u901a\u3058\u3066\u3001\u5e38\u306b\u6700\u65b0\u306e\u77e5\u8b58\u3068\u30b9\u30ad\u30eb\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<p>\u5805\u7262\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3001\u512a\u308c\u305fJava\u958b\u767a\u8005\u3068\u306a\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u4e00\u6b69\u3067\u3059\u3002\u3053\u3053\u3067\u5b66\u3093\u3060\u5185\u5bb9\u3092\u57fa\u306b\u3001\u81ea\u4fe1\u3092\u6301\u3063\u3066\u6b21\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u81e8\u3093\u3067\u304f\u3060\u3055\u3044\u3002\u30a8\u30e9\u30fc\u306b\u9069\u5207\u306b\u5bfe\u51e6\u3067\u304d\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u3068\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u306e\u4e21\u65b9\u306b\u4fa1\u5024\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002\u9811\u5f35\u3063\u3066\u3001\u5805\u7262\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u306b\u53d6\u308a\u7d44\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: 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