{"id":397,"date":"2024-10-23T14:24:12","date_gmt":"2024-10-23T05:24:12","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=397"},"modified":"2025-03-24T08:53:20","modified_gmt":"2025-03-23T23:53:20","slug":"%e3%80%90java%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91string%e3%81%a8int%e3%81%ae%e5%a4%89%e6%8f%9b%e6%96%b9%e6%b3%955%e9%81%b8%e3%81%a8%e5%ae%9f%e8%b7%b5%e7%9a%84%e3%81%aa%e3%82%b3","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=397","title":{"rendered":"\u3010Java\u5b8c\u5168\u30ac\u30a4\u30c9\u3011String\u3068Int\u306e\u5909\u63db\u65b9\u6cd55\u9078\u3068\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b"},"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\">1. \u306f\u3058\u3081\u306b\uff1aJava\u306b\u304a\u3051\u308bString\u3068Int\u306e\u5909\u63db\u306e\u91cd\u8981\u6027<\/a>  <\/li>  <li>    <a href=\"#i-1\">2. String\u304b\u3089Int\u3078\u306e\u5909\u63db\uff1a3\u3064\u306e\u4e3b\u8981\u306a\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-2\">2.1 Integer.parseInt()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u5909\u63db<\/a>      <\/li>      <li>        <a href=\"#i-3\">2.2 Integer.valueOf()\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308b\u5909\u63db<\/a>      <\/li>      <li>        <a href=\"#i-4\">2.3 \u65b0\u3057\u3044Integer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">\u5909\u63db\u65b9\u6cd5\u306e\u6bd4\u8f03<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">3. Int\u304b\u3089String\u3078\u306e\u5909\u63db\uff1a2\u3064\u306e\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">3.1 String.valueOf()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u5909\u63db<\/a>      <\/li>      <li>        <a href=\"#i-8\">3.2 \u6574\u6570\u306b\u7a7a\u6587\u5b57\u5217\u3092\u9023\u7d50\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">\u5909\u63db\u65b9\u6cd5\u306e\u6bd4\u8f03<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">4. \u5909\u63db\u6642\u306e\u30a8\u30e9\u30fc\u51e6\u7406\uff1a\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">4.1 NumberFormatException\u306e\u7406\u89e3\u3068\u9069\u5207\u306a\u51e6\u7406<\/a>      <\/li>      <li>        <a href=\"#i-12\">4.2 try-catch\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-13\">4.3 \u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u53ef\u8aad\u6027\u306e\u6700\u9069\u5316\uff1a\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">5.1 \u5404\u5909\u63db\u65b9\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">5.2 \u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u547d\u540d\u898f\u5247\u3068\u30b3\u30e1\u30f3\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">6. \u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\uff1a\u65e5\u5e38\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306e\u6d3b\u7528<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">6.1 \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406\uff1a\u6587\u5b57\u5217\u3092\u6574\u6570\u306b\u5909\u63db<\/a>      <\/li>      <li>        <a href=\"#i-19\">6.2 \u30c7\u30fc\u30bf\u96c6\u8a08\uff1a\u6574\u6570\u306e\u30ea\u30b9\u30c8\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u51fa\u529b<\/a>      <\/li>      <li>        <a href=\"#i-20\">6.3 \u3053\u308c\u3089\u306e\u4f8b\u304b\u3089\u5b66\u3079\u308b\u6559\u8a13<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">6.4 \u81ea\u8eab\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u9069\u7528<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-22\">7. \u307e\u3068\u3081\uff1aJava\u3067\u306eString-Int\u5909\u63db\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-23\">7.1 \u5b66\u3093\u3060\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af\u306e\u5fa9\u7fd2<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-24\">7.2 \u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/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\">1. \u306f\u3058\u3081\u306b\uff1aJava\u306b\u304a\u3051\u308bString\u3068Int\u306e\u5909\u63db\u306e\u91cd\u8981\u6027<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066String\u3068Int\u306e\u5909\u63db\u306f\u3001\u65e5\u3005\u306e\u958b\u767a\u4f5c\u696d\u3067\u983b\u7e41\u306b\u906d\u9047\u3059\u308b\u91cd\u8981\u306a\u30bf\u30b9\u30af\u3067\u3059\u3002\u3053\u306e\u5909\u63db\u304c\u5fc5\u8981\u3068\u306a\u308b\u4e3b\u306a\u7406\u7531\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\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\">\u5909\u63db\u304c\u5fc5\u8981\u306a\u7406\u7531<\/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-3\">\n<li><strong>\u30c7\u30fc\u30bf\u578b\u306e\u4e00\u8cab\u6027\u7dad\u6301<\/strong>\uff1a \u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u30c7\u30fc\u30bf\u3092\u9069\u5207\u306b\u51e6\u7406\u3059\u308b\u305f\u3081<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<li><strong>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406<\/strong>\uff1a Web\u30d5\u30a9\u30fc\u30e0\u306a\u3069\u304b\u3089\u306e\u6587\u5b57\u5217\u5165\u529b\u3092\u6570\u5024\u3068\u3057\u3066\u6271\u3046\u305f\u3081<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-5\">\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a<\/strong>\uff1a \u6587\u5b57\u5217\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u305f\u6570\u5024\u30c7\u30fc\u30bf\u3092\u8a08\u7b97\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-6\">\n<li><strong>\u8a08\u7b97\u51e6\u7406\u306e\u5b9f\u884c<\/strong>\uff1a \u6570\u5024\u6f14\u7b97\u3092\u884c\u3046\u969b\u306b\u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081<\/li>\n<\/div>\n\n\n<li><strong>\u5916\u90e8\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u30c7\u30fc\u30bf\u4ea4\u63db<\/strong>\uff1a API\u3084\u30d5\u30a1\u30a4\u30eb\u3092\u4ecb\u3057\u3066\u3084\u308a\u53d6\u308a\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u5f62\u5f0f\u3092\u9069\u5207\u306b\u51e6\u7406\u3059\u308b\u305f\u3081<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<p>\u3057\u304b\u3057\u3001\u3053\u306e\u5909\u63db\u30d7\u30ed\u30bb\u30b9\u306b\u306f\u6ce8\u610f\u3059\u3079\u304d\u70b9\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<code>NumberFormatException<\/code>\u306e\u9069\u5207\u306a\u51e6\u7406\u3001null\u5024\u3084\u7a7a\u6587\u5b57\u5217\u306e\u6271\u3044\u3001\u5927\u304d\u306a\u6570\u5024\u306e\u5909\u63db\u6642\u306e\u6ce8\u610f\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044Java\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-9\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001String\u304b\u3089Int\u3078\u306e\u5909\u63db\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<h2 class=\"wp-block-heading\" id=\"i-1\">2. String\u304b\u3089Int\u3078\u306e\u5909\u63db\uff1a3\u3064\u306e\u4e3b\u8981\u306a\u65b9\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<p>Java\u3067String\u3092Int\u306b\u5909\u63db\u3059\u308b\u969b\u3001\u4e3b\u306b3\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u5834\u9762\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-12\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">2.1 Integer.parseInt()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u5909\u63db<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<p><code>Integer.parseInt()<\/code>\u306f\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u76f4\u611f\u7684\u306a\u65b9\u6cd5\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=\"\">String strNum = \"123\";\nint num = Integer.parseInt(strNum);\n\/\/ num \u306f 123 \u3068\u3044\u3046int\u578b\u306e\u5024\u306b\u306a\u308a\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-14\">\n<p>\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6int\u578b\u3092\u76f4\u63a5\u8fd4\u3059\u305f\u3081\u3001\u30aa\u30fc\u30c8\u30dc\u30af\u30b7\u30f3\u30b0\u304c\u4e0d\u8981\u3067\u52b9\u7387\u7684\u3067\u3059\u3002\u305f\u3060\u3057\u3001null\u3092\u6e21\u3059\u3068NullPointerException\u304c\u767a\u751f\u3059\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-15\">\n<h3 class=\"wp-block-heading\" id=\"i-3\">2.2 Integer.valueOf()\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308b\u5909\u63db<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-16\">\n<p><code>Integer.valueOf()<\/code>\u306fInteger\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3057\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=\"\">String strNum = \"456\";\nInteger num = Integer.valueOf(strNum);\n\/\/ num \u306f 456 \u3068\u3044\u3046\u5024\u3092\u6301\u3064Integer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306a\u308a\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-17\">\n<p>\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f-128\u304b\u3089127\u306e\u7bc4\u56f2\u306e\u5024\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u305f\u3081\u3001\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u5c0f\u3055\u306a\u5024\u306e\u5909\u63db\u306b\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<h3 class=\"wp-block-heading\" id=\"i-4\">2.3 \u65b0\u3057\u3044Integer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5<\/h3>\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=\"\">String strNum = \"789\";\nInteger num = new Integer(strNum);\n\/\/ num \u306f 789 \u3068\u3044\u3046\u5024\u3092\u6301\u3064\u65b0\u3057\u3044Integer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306a\u308a\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-19\">\n<p>\u3053\u306e\u65b9\u6cd5\u306f Java 9 \u4ee5\u964d\u3067\u306f\u975e\u63a8\u5968\u3068\u306a\u3063\u3066\u304a\u308a\u3001\u53ef\u80fd\u306a\u9650\u308a\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002\u5e38\u306b\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u60aa\u3044\u306e\u304c\u6b20\u70b9\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-20\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u5909\u63db\u65b9\u6cd5\u306e\u6bd4\u8f03<\/h3>\n<\/div>\n\n<div id=\"id-a1f8fcf5-8a04-4a66-84d9-a72982b75028\"><div id=\"sgb-css-id-21\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5<\/th><th>\u8fd4\u308a\u5024\u306e\u578b<\/th><th>Null\u306e\u6271\u3044<\/th><th>\u30e1\u30e2\u30ea\u52b9\u7387<\/th><th>\u63a8\u5968\u5ea6<\/th><\/tr><\/thead><tbody><tr><td>parseInt()<\/td><td>int<\/td><td>NPE\u767a\u751f<\/td><td>\u9ad8<\/td><td>\u25ce<\/td><\/tr><tr><td>valueOf()<\/td><td>Integer<\/td><td>NPE\u767a\u751f<\/td><td>\u4e2d<\/td><td>\u25cb<\/td><\/tr><tr><td>new Integer()<\/td><td>Integer<\/td><td>NPE\u767a\u751f<\/td><td>\u4f4e<\/td><td>\u00d7<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-23\">\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\u30d2\u30f3\u30c8\uff1a<\/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-22\">\n<li>\u57fa\u672c\u7684\u306b\u306f<code>parseInt()<\/code>\u3092\u4f7f\u7528\u3057\u3001Integer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f<code>valueOf()<\/code>\u3092\u9078\u629e\u3059\u308b\u306e\u304c\u826f\u3044\u3002<\/li>\n<\/div>\n\n\n<li>\u5e38\u306bnull\u5024\u306e\u53ef\u80fd\u6027\u3092\u8003\u616e\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u884c\u3046\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u9006\u306e\u5909\u63db\u3067\u3042\u308bInt\u304b\u3089String\u3078\u306e\u5909\u63db\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-25\">\n<h2 class=\"wp-block-heading\" id=\"i-6\">3. Int\u304b\u3089String\u3078\u306e\u5909\u63db\uff1a2\u3064\u306e\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-26\">\n<p>\u6574\u6570\u5024\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u306f\u3001\u6570\u5024\u30c7\u30fc\u30bf\u306e\u8868\u793a\u3001\u30ed\u30b0\u51fa\u529b\u3001\u30c6\u30ad\u30b9\u30c8\u30d9\u30fc\u30b9\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u306a\u3069\u3001\u591a\u304f\u306e\u5834\u9762\u3067\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002Java\u3067\u306fInt\u304b\u3089String\u3078\u306e\u5909\u63db\u306b\u4e3b\u306b2\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<h3 class=\"wp-block-heading\" id=\"i-7\">3.1 String.valueOf()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u5909\u63db<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<p><code>String.valueOf()<\/code>\u306f\u3001\u69d8\u3005\u306a\u578b\u306e\u5024\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3067\u304d\u308b\u9759\u7684\u30e1\u30bd\u30c3\u30c9\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=\"\">int num = 123;\nString str = String.valueOf(num);\n\/\/ str \u306f \"123\" \u3068\u3044\u3046\u6587\u5b57\u5217\u306b\u306a\u308a\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-29\">\n<p>\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f null\u306e\u6271\u3044\u304c\u5b89\u5168\u3067\u3001\u3069\u306e\u578b\u306e\u5024\u3067\u3082\u53d7\u3051\u4ed8\u3051\u3089\u308c\u308b\u6c4e\u7528\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-30\">\n<h3 class=\"wp-block-heading\" id=\"i-8\">3.2 \u6574\u6570\u306b\u7a7a\u6587\u5b57\u5217\u3092\u9023\u7d50\u3059\u308b\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<p>\u3082\u3046\u4e00\u3064\u306e\u65b9\u6cd5\u306f\u3001\u6574\u6570\u306b\u7a7a\u6587\u5b57\u5217\u3092\u52a0\u3048\u308b\u3053\u3068\u3067\u81ea\u52d5\u7684\u306b\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\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=\"\">int num = 456;\nString str = num + \"\";\n\/\/ str \u306f \"456\" \u3068\u3044\u3046\u6587\u5b57\u5217\u306b\u306a\u308a\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-32\">\n<p>\u3053\u306e\u65b9\u6cd5\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u76f4\u611f\u7684\u3067\u3059\u304c\u3001\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-33\">\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u5909\u63db\u65b9\u6cd5\u306e\u6bd4\u8f03<\/h3>\n<\/div>\n\n<div id=\"id-11cacae3-1381-4614-8321-4c614d13f7b1\"><div id=\"sgb-css-id-34\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5<\/th><th>\u53ef\u8aad\u6027<\/th><th>\u6c4e\u7528\u6027<\/th><th>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/th><th>\u63a8\u5968\u5ea6<\/th><\/tr><\/thead><tbody><tr><td>String.valueOf()<\/td><td>\u9ad8<\/td><td>\u9ad8<\/td><td>\u826f\u597d<\/td><td>\u25ce<\/td><\/tr><tr><td>\u7a7a\u6587\u5b57\u5217\u9023\u7d50<\/td><td>\u4e2d<\/td><td>\u4f4e<\/td><td>\u826f\u597d<\/td><td>\u25cb<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-37\">\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\u30d2\u30f3\u30c8\uff1a<\/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>\u4e00\u822c\u7684\u306b\u306f\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u3067\u3001\u4ed6\u306e\u958b\u767a\u8005\u306b\u3082\u7406\u89e3\u3057\u3084\u3059\u3044 <code>String.valueOf()<\/code> \u3092\u4f7f\u7528\u3059\u308b\u306e\u304c\u826f\u3044\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6975\u3081\u3066\u91cd\u8981\u306a\u5834\u5408\u3084\u3001\u5927\u91cf\u306e\u5909\u63db\u3092\u884c\u3046\u5834\u5408\u306f\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30c6\u30b9\u30c8\u3092\u884c\u3063\u3066\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3002<\/li>\n<\/div><\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-38\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u5909\u63db\u3092\u884c\u3046\u969b\u306b\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30a8\u30e9\u30fc\u3068\u305d\u306e\u51e6\u7406\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-39\">\n<h2 class=\"wp-block-heading\" id=\"i-10\">4. \u5909\u63db\u6642\u306e\u30a8\u30e9\u30fc\u51e6\u7406\uff1a\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u306e\u66f8\u304d\u65b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-40\">\n<p>String-Int\u5909\u63db\u6642\u306b\u306f\u3001\u9069\u5207\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u4e3b\u306b\u6ce8\u610f\u3059\u3079\u304d\u4f8b\u5916\u306f<code>NumberFormatException<\/code>\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<h3 class=\"wp-block-heading\" id=\"i-11\">4.1 NumberFormatException\u306e\u7406\u89e3\u3068\u9069\u5207\u306a\u51e6\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-42\">\n<p><code>NumberFormatException<\/code>\u306f\u3001\u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u5909\u63db\u3059\u308b\u969b\u306b\u3001\u9069\u5207\u306a\u5f62\u5f0f\u3067\u306a\u3044\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-45\">\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\">\u30a8\u30e9\u30fc\u306e\u767a\u751f\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-43\">\n<li>\u6570\u5b57\u4ee5\u5916\u306e\u6587\u5b57\u3092\u542b\u3080\u6587\u5b57\u5217\u306e\u5909\u63db<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-44\">\n<li>\u7a7a\u6587\u5b57\u5217\u306e\u5909\u63db<\/li>\n<\/div>\n\n\n<li>\u6570\u5024\u306e\u7bc4\u56f2\u3092\u8d85\u3048\u305f\u5024\u306e\u5909\u63db<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p>\u3053\u308c\u3089\u306e\u72b6\u6cc1\u3092\u9069\u5207\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5805\u7262\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">4.2 try-catch\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-48\">\n<p>try-catch\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u3001\u5b89\u5168\u306b\u5909\u63db\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u57fa\u672c\u7684\u306a\u4f7f\u7528\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=\"\">try {\n    String strNumber = \"123\";\n    int number = Integer.parseInt(strNumber);\n    System.out.println(\"\u5909\u63db\u5f8c\u306e\u6570\u5024: \" + number);\n} catch (NumberFormatException e) {\n    System.out.println(\"\u6570\u5024\u306b\u5909\u63db\u3067\u304d\u307e\u305b\u3093: \" + e.getMessage());\n    \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u8a18\u9332\u3084\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u8a2d\u5b9a\u306a\u3069\u306e\u51e6\u7406\u3092\u884c\u3046\n}<\/pre>\n\n\n<div id=\"sgb-css-id-49\">\n<h3 class=\"wp-block-heading\" id=\"i-13\">4.3 \u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-53\">\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\">\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/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-50\">\n<li>\u5177\u4f53\u7684\u306a\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-51\">\n<li>\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u63d0\u4f9b\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b<\/li>\n<\/div>\n\n\n<li>\u53ef\u80fd\u306a\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n<\/ol>\n<\/div><\/div>\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 int safeParseInt(String str, int defaultValue) {\n    try {\n        return Integer.parseInt(str);\n    } catch (NumberFormatException e) {\n        logger.warn(\"\u6570\u5024\u5909\u63db\u30a8\u30e9\u30fc: \" + str, e);\n        return defaultValue;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-54\">\n<p>\u9069\u5207\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u306b\u3088\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30af\u30e9\u30c3\u30b7\u30e5\u3092\u9632\u304e\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3092\u5411\u4e0a\u3055\u305b\u3001\u30c7\u30d0\u30c3\u30b0\u3092\u5bb9\u6613\u306b\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u5909\u63db\u51e6\u7406\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u53ef\u8aad\u6027\u306e\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-56\">\n<h2 class=\"wp-block-heading\" id=\"i-14\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u53ef\u8aad\u6027\u306e\u6700\u9069\u5316\uff1a\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-57\">\n<p>String-Int\u5909\u63db\u306b\u304a\u3044\u3066\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u53ef\u8aad\u6027\u306e\u6700\u9069\u5316\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5404\u5909\u63db\u65b9\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u3068\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-58\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">5.1 \u5404\u5909\u63db\u65b9\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/h3>\n<\/div>\n\n<div id=\"id-ac595345-34f6-4395-a9ed-ef1e1a4e9128\"><div id=\"sgb-css-id-59\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u65b9\u6cd5<\/th><th>\u901f\u5ea6<\/th><th>\u30e1\u30e2\u30ea\u4f7f\u7528<\/th><th>\u9069\u7528\u5834\u9762<\/th><\/tr><\/thead><tbody><tr><td>Integer.parseInt()<\/td><td>\u9ad8\u901f<\/td><td>\u4f4e<\/td><td>\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u3001\u30ea\u30bd\u30fc\u30b9\u5236\u9650\u74b0\u5883<\/td><\/tr><tr><td>Integer.valueOf()<\/td><td>\u4e2d\u901f\u301c\u9ad8\u901f<\/td><td>\u4e2d\u301c\u4f4e<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3001\u983b\u7e41\u306a\u540c\u5024\u4f7f\u7528<\/td><\/tr><tr><td>new Integer()<\/td><td>\u4f4e\u901f<\/td><td>\u9ad8<\/td><td>\u7279\u6b8a\u30b1\u30fc\u30b9\u3001\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-60\">\n<p><code>Integer.parseInt()<\/code>\u306f\u4e00\u822c\u7684\u306b\u6700\u3082\u9ad8\u901f\u3067\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u3082\u5c11\u306a\u3044\u305f\u3081\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u3084\u5236\u7d04\u306e\u3042\u308b\u74b0\u5883\u3067\u9069\u3057\u3066\u3044\u307e\u3059\u3002<code>Integer.valueOf()<\/code>\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u80fd\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u7bc4\u56f2\u5185\u306e\u5024\u3067\u9ad8\u901f\u306b\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-61\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">5.2 \u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u547d\u540d\u898f\u5247\u3068\u30b3\u30e1\u30f3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-65\">\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\u547d\u540d\u898f\u5247\uff1a<\/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-62\">\n<li>\u63cf\u5199\u7684\u306a\u5909\u6570\u540d\uff1a <code>userAge<\/code>, <code>maxAllowedInput<\/code><\/li>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<li>\u30e1\u30bd\u30c3\u30c9\u540d\u306f\u52d5\u8a5e\u3067\u958b\u59cb\uff1a <code>convertToInt()<\/code>, <code>parseUserInput()<\/code><\/li>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<li>\u5b9a\u6570\u306f\u5927\u6587\u5b57\u3068\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\uff1a <code>MAX_INPUT_LENGTH<\/code><\/li>\n<\/div>\n\n\n<li>\u30d6\u30fc\u30eb\u5909\u6570\u306f\u7591\u554f\u5f62\uff1a <code>isValid<\/code>, <code>hasPermission<\/code><\/li>\n<\/ul>\n<\/div><\/div>\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 int convertToInt(String userInput) {\n    final int DEFAULT_VALUE = 0;\n    int convertedValue = DEFAULT_VALUE;\n\n    try {\n        convertedValue = Integer.parseInt(userInput);\n    } catch (NumberFormatException e) {\n        \/\/ \u30ed\u30b0\u8a18\u9332\u3084\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\n    }\n\n    return convertedValue;\n}<\/pre>\n\n\n<div id=\"sgb-css-id-68\">\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\u30b3\u30e1\u30f3\u30c8\uff1a<\/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-66\">\n<li>\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u306e\u8aac\u660e\u306b\u7126\u70b9\u3092\u5f53\u3066\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-67\">\n<li>Javadoc\u3092\u4f7f\u7528\u3057\u3066API\u3092\u6587\u66f8\u5316\u3059\u308b<\/li>\n<\/div>\n\n\n<li>TODO\u30b3\u30e1\u30f3\u30c8\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-69\">\n<p>\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u69cb\u9020\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u8cac\u52d9\u3092\u5358\u4e00\u306b\u4fdd\u3061\u3001\u9069\u5207\u306a\u6539\u884c\u3068\u30a4\u30f3\u30c7\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u3001\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\u3092\u907f\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-70\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\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-71\">\n<h2 class=\"wp-block-heading\" id=\"i-17\">6. \u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\uff1a\u65e5\u5e38\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306e\u6d3b\u7528<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<p>\u3053\u3053\u3067\u306f\u3001String-Int\u5909\u63db\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\u30922\u3064\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4f8b\u3092\u901a\u3058\u3066\u3001\u3053\u308c\u307e\u3067\u5b66\u3093\u3060\u6982\u5ff5\u3092\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u306b\u9069\u7528\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-73\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">6.1 \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406\uff1a\u6587\u5b57\u5217\u3092\u6574\u6570\u306b\u5909\u63db<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<p>\u4ee5\u4e0b\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u5e74\u9f62\u3092\u5165\u529b\u3057\u3066\u3082\u3089\u3044\u3001\u305d\u306e\u5024\u3092\u6574\u6570\u306b\u5909\u63db\u3057\u3066\u51e6\u7406\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 java.util.Scanner;\n\npublic class UserInputExample {\n    public static void main(String[] args) {\n        Scanner scanner = new Scanner(System.in);\n        int age = 0;\n        boolean validInput = false;\n\n        while (!validInput) {\n            System.out.print(\"\u3042\u306a\u305f\u306e\u5e74\u9f62\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044: \");\n            String input = scanner.nextLine();\n\n            try {\n                age = Integer.parseInt(input);\n                if (age &lt; 0 || age &gt; 150) {\n                    System.out.println(\"\u6709\u52b9\u306a\u5e74\u9f62\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\uff080\u301c150\uff09\u3002\");\n                } else {\n                    validInput = true;\n                }\n            } catch (NumberFormatException e) {\n                System.out.println(\"\u6570\u5b57\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\");\n            }\n        }\n\n        System.out.println(\"\u5165\u529b\u3055\u308c\u305f\u5e74\u9f62: \" + age);\n        scanner.close();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-75\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001<code>Integer.parseInt()<\/code>\u3092\u4f7f\u7528\u3057\u3066\u6587\u5b57\u5217\u3092\u6574\u6570\u306b\u5909\u63db\u3057\u3066\u3044\u307e\u3059\u3002try-catch\u30d6\u30ed\u30c3\u30af\u3067NumberFormatException\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3001\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5e74\u9f62\u306e\u59a5\u5f53\u6027\u30c1\u30a7\u30c3\u30af\u3082\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-76\">\n<h3 class=\"wp-block-heading\" id=\"i-19\">6.2 \u30c7\u30fc\u30bf\u96c6\u8a08\uff1a\u6574\u6570\u306e\u30ea\u30b9\u30c8\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u51fa\u529b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-77\">\n<p>\u6b21\u306b\u3001\u6574\u6570\u306e\u30ea\u30b9\u30c8\u3092\u53d7\u3051\u53d6\u308a\u3001\u305d\u306e\u5408\u8a08\u3068\u5e73\u5747\u3092\u8a08\u7b97\u3057\u3001\u7d50\u679c\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u51fa\u529b\u3059\u308b\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=\"\">import java.util.Arrays;\nimport java.util.List;\n\npublic class DataAggregationExample {\n    public static void main(String[] args) {\n        List&lt;Integer&gt; numbers = Arrays.asList(1, 2, 3, 4, 5);\n        String result = aggregateData(numbers);\n        System.out.println(result);\n    }\n\n    public static String aggregateData(List&lt;Integer&gt; numbers) {\n        if (numbers == null || numbers.isEmpty()) {\n            return \"\u30c7\u30fc\u30bf\u304c\u3042\u308a\u307e\u305b\u3093\u3002\";\n        }\n\n        int sum = numbers.stream().mapToInt(Integer::intValue).sum();\n        double average = numbers.stream().mapToInt(Integer::intValue).average().orElse(0.0);\n\n        return String.format(\"\u5408\u8a08: %d, \u5e73\u5747: %.2f\", sum, average);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-78\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001Stream\u3092\u4f7f\u7528\u3057\u3066\u52b9\u7387\u7684\u306b\u5408\u8a08\u3068\u5e73\u5747\u3092\u8a08\u7b97\u3057\u3066\u3044\u307e\u3059\u3002<code>String.format()<\/code>\u3092\u4f7f\u7528\u3057\u3066\u3001\u7d50\u679c\u3092\u898b\u3084\u3059\u3044\u5f62\u5f0f\u3067\u51fa\u529b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-79\">\n<p>\u4e21\u65b9\u306e\u4f8b\u3067\u5171\u901a\u3057\u3066\u898b\u3089\u308c\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306f\u3001\u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\u3001null\u3084\u7a7a\u306e\u5165\u529b\u306e\u30c1\u30a7\u30c3\u30af\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u5358\u4e00\u8cac\u4efb\u539f\u5247\u306e\u9069\u7528\u3001\u660e\u78ba\u306a\u5909\u6570\u540d\u3068\u30b3\u30e1\u30f3\u30c8\u306e\u4f7f\u7528\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-80\">\n<h3 class=\"wp-block-heading\" id=\"i-20\">6.3 \u3053\u308c\u3089\u306e\u4f8b\u304b\u3089\u5b66\u3079\u308b\u6559\u8a13<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\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\">\u4f8b\u304b\u3089\u5b66\u3079\u308b\u6559\u8a13<\/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>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u691c\u8a3c<\/strong>\uff1a \u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u5165\u529b\u306f\u5e38\u306b\u691c\u8a3c\u304c\u5fc5\u8981\u3067\u3059\u3002\u6570\u5024\u306e\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u3084\u578b\u5909\u63db\u306e\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u5fd8\u308c\u305a\u306b\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-82\">\n<li><strong>\u6027\u80fd\u3068\u53ef\u8aad\u6027\u306e\u30d0\u30e9\u30f3\u30b9<\/strong>\uff1a StreamAPI\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u4fdd\u3061\u306a\u304c\u3089\u52b9\u7387\u7684\u306a\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-83\">\n<li><strong>\u518d\u5229\u7528\u53ef\u80fd\u306a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9<\/strong>\uff1a <code>aggregateData<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u3088\u3046\u306b\u3001\u7279\u5b9a\u306e\u6a5f\u80fd\u3092\u72ec\u7acb\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u9069\u5207\u306a\u30c7\u30fc\u30bf\u578b\u306e\u9078\u629e<\/strong>\uff1a \u6574\u6570\u5024\u3092\u6271\u3046\u969b\u306f\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066int\u3084long\u3092\u9069\u5207\u306b\u9078\u629e\u3057\u307e\u3057\u3087\u3046\u3002\u5927\u304d\u306a\u6570\u5024\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-85\">\n<h3 class=\"wp-block-heading\" id=\"i-21\">6.4 \u81ea\u8eab\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u9069\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<p>\u3053\u308c\u3089\u306e\u4f8b\u3092\u81ea\u8eab\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u9069\u7528\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\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\">\u81ea\u8eab\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u9069\u7528\u3059\u308b\u306b\u306f<\/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-87\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u3066\u3001\u9069\u5207\u306a\u5909\u63db\u65b9\u6cd5\u3068\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u9078\u629e\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-88\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u91cd\u8981\u306a\u5834\u5408\u306f\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30c6\u30b9\u30c8\u3092\u884c\u3044\u3001\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u3076<\/li>\n<\/div>\n\n\n<li>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3092\u901a\u3058\u3066\u3001\u30c1\u30fc\u30e0\u5185\u3067\u4e00\u8cab\u6027\u306e\u3042\u308b\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u3092\u7dad\u6301\u3059\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-90\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u307e\u3067\u5b66\u3093\u3060\u5185\u5bb9\u3092\u7dcf\u62ec\u3057\u3001\u3055\u3089\u306a\u308b\u5b66\u7fd2\u306e\u305f\u3081\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-91\">\n<h2 class=\"wp-block-heading\" id=\"i-22\">7. \u307e\u3068\u3081\uff1aJava\u3067\u306eString-Int\u5909\u63db\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<h3 class=\"wp-block-heading\" id=\"i-23\">7.1 \u5b66\u3093\u3060\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af\u306e\u5fa9\u7fd2<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Java\u306b\u304a\u3051\u308bString-Int\u5909\u63db\u306e\u91cd\u8981\u6027\u3068\u4e3b\u8981\u306a\u5909\u63db\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\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\">\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u3053\u3068<\/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-94\">\n<li><code>Integer.parseInt()<\/code>\uff1a\u30d7\u30ea\u30df\u30c6\u30a3\u30d6int\u578b\u3092\u8fd4\u3059\u6700\u3082\u4e00\u822c\u7684\u306a\u65b9\u6cd5<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<li><code>Integer.valueOf()<\/code>\uff1a Integer\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3057\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u80fd\u304c\u3042\u308b<\/li>\n<\/div>\n\n\n<li><code>String.valueOf()<\/code>\uff1a \u6574\u6570\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u6a19\u6e96\u7684\u306a\u65b9\u6cd5<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<p>\u3053\u308c\u3089\u306e\u65b9\u6cd5\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u304b\u3064\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<h3 class=\"wp-block-heading\" id=\"i-24\">7.2 \u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<p>\u3055\u3089\u306a\u308b\u5b66\u7fd2\u306e\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\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\">\u3055\u3089\u306a\u308b\u5b66\u7fd2\u306b\u5411\u3051\u3066<\/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-100\">\n<li>\u66f8\u7c4d\uff1a\u300cEffective Java\u300d\uff08\u8457\uff1aJoshua Bloch\uff09<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-101\">\n<li>\u30aa\u30f3\u30e9\u30a4\u30f3\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\uff1aOracle Java Tutorials<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<li>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff1aJava SE Documentation<\/li>\n<\/div>\n\n\n<li>\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u30d5\u30a9\u30fc\u30e9\u30e0\uff1aStack Overflow<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-104\">\n<p>\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8ab2\u984c\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u3067\u3001\u30b9\u30ad\u30eb\u3092\u66f4\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\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\">\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u8ab2\u984c\u4f8b<\/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-105\">\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306e\u5909\u63db\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-106\">\n<li>\u30ab\u30b9\u30bf\u30e0\u578b\u5909\u63db\u30af\u30e9\u30b9\u306e\u4f5c\u6210<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-107\">\n<li>\u56fd\u969b\u5316\uff08i18n\uff09\u3092\u8003\u616e\u3057\u305f\u6570\u5024\u5909\u63db\u306e\u5b9f\u88c5<\/li>\n<\/div>\n\n\n<li>\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u305f\u5909\u63db\u30e1\u30bd\u30c3\u30c9\u306e\u691c\u8a3c<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-108\">\n<p>Java\u3067\u306eString-Int\u5909\u63db\u306e\u30de\u30b9\u30bf\u30fc\u306b\u306a\u308b\u9053\u306e\u308a\u306f\u7d9a\u304d\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u57fa\u790e\u3092\u6d3b\u304b\u3057\u3001\u5b9f\u8df5\u3092\u91cd\u306d\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u52b9\u7387\u7684\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":3039,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,70,66],"tags":[],"class_list":{"0":"post-397","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-java","8":"category-java-string","9":"category-java-syntax"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=397"}],"version-history":[{"count":8,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/397\/revisions"}],"predecessor-version":[{"id":3071,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/397\/revisions\/3071"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/media\/3039"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}