{"id":1124,"date":"2024-11-21T17:56:55","date_gmt":"2024-11-21T08:56:55","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1124"},"modified":"2025-03-24T08:52:44","modified_gmt":"2025-03-23T23:52:44","slug":"%e3%80%90java%e5%85%a5%e9%96%80%e3%80%913%e9%a0%85%e6%bc%94%e7%ae%97%e5%ad%90%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e5%ae%9f%e8%b7%b5%e4%be%8b15","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1124","title":{"rendered":"\u3010Java\u5165\u9580\u30113\u9805\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u5b9f\u8df5\u4f8b15\u500b\u3067\u57fa\u790e\u304b\u3089\u30de\u30b9\u30bf\u30fc"},"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\">\u306f\u3058\u3081\u306b<\/a>  <\/li>  <li>    <a href=\"#i-1\">\uff11\uff0e3\u9805\u6f14\u7b97\u5b50\u3068\u306f\uff1f\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\u57fa\u790e\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-2\">1.1  if-else\u6587\u3068\u306e\u9055\u3044\u304b\u3089\u308f\u304b\u308b3\u9805\u6f14\u7b97\u5b50\u306e\u7279\u5fb4<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">1.2  3\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">\uff12\uff0e3\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u6587\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">2.1  3\u9805\u6f14\u7b97\u5b50\u306e\u69cb\u6587\u30eb\u30fc\u30eb<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">2.2 \u623b\u308a\u5024\u306e\u578b\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">\uff13\uff0e\u5b9f\u8df5\u3067\u4f7f\u3048\u308b3\u9805\u6f14\u7b97\u5b50\u306e\u5177\u4f53\u4f8b15\u9078<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">3.1 \u6570\u5024\u3092\u6bd4\u8f03\u3059\u308b\u5834\u5408\u306e\u4f7f\u7528\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-20\">3.2 \u6587\u5b57\u5217\u3092\u64cd\u4f5c\u3059\u308b\u5834\u5408\u306e\u4f7f\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-24\">3.3 null\u30c1\u30a7\u30c3\u30af\u3067\u306e\u6d3b\u7528\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-34\">\uff14\uff0e3\u9805\u6f14\u7b97\u5b50\u306e\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3068\u907f\u3051\u308b\u3079\u304d\u4f7f\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-35\">4.1 \u30cd\u30b9\u30c8\u3057\u305f3\u9805\u6f14\u7b97\u5b50\u306e\u554f\u984c\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-39\">4.2 \u904e\u5ea6\u306a\u4f7f\u7528\u306b\u3088\u308b\u53ef\u8aad\u6027\u306e\u4f4e\u4e0b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-44\">\uff15\uff0e3\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u30b3\u30fc\u30c9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-45\">5.1 if-else\u6587\u304b\u30893\u9805\u6f14\u7b97\u5b50\u3078\u306e\u66f8\u304d\u63db\u3048\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-49\">5.2 \u53ef\u8aad\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-54\">\uff16\uff0e\u5fdc\u7528\uff1aStreamAPI\u3068\u7d44\u307f\u5408\u308f\u305b\u305f3\u9805\u6f14\u7b97\u5b50\u306e\u6d3b\u7528<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-55\">6.1 \u30e9\u30e0\u30c0\u5f0f\u3067\u306e3\u9805\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-59\">6.2 Optional\u578b\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-64\">\u307e\u3068\u3081\uff1a3\u9805\u6f14\u7b97\u5b50\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u306b\u5411\u3051\u3066<\/a>    <ul class=\"menu_level_1\">      <li class=\"first last\">        <a href=\"#i-68\">\u6700\u5f8c\u306b<\/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\">\u306f\u3058\u3081\u306b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p class=\"wp-block-paragraph\">Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u304f\u3059\u308b\u91cd\u8981\u306a\u6a5f\u80fd\u306e1\u3064\u304c\u300c3\u9805\u6f14\u7b97\u5b50\uff08\u4e09\u9805\u6f14\u7b97\u5b50\uff09\u300d\u3067\u3059\u3002if-else\u6587\u306e\u4ee3\u66ff\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u308b\u3053\u306e\u6f14\u7b97\u5b50\u306f\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\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-6\">\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\u3079\u308b\u3053\u3068<\/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-3\">\n<li>3\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u6587\u6cd5<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<li>\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b15\u500b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-5\">\n<li>\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762\u3068\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3<\/li>\n<\/div>\n\n\n<li>StreamAPI\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<p class=\"wp-block-paragraph\">\u672c\u8a18\u4e8b\u3067\u306f\u30013\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u307e\u3067\u3001\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u4ea4\u3048\u306a\u304c\u3089\u6bb5\u968e\u7684\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u521d\u5fc3\u8005\u306e\u65b9\u3067\u3082\u7406\u89e3\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u3001\u57fa\u672c\u7684\u306a\u6982\u5ff5\u304b\u3089\u5fdc\u7528\u7684\u306a\u30c8\u30d4\u30c3\u30af\u307e\u3067\u3001\u9806\u3092\u8ffd\u3063\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<p class=\"wp-block-paragraph\">\u305d\u308c\u3067\u306f\u30013\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u790e\u304b\u3089\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\n<h2 class=\"wp-block-heading\" id=\"i-1\">\uff11\uff0e3\u9805\u6f14\u7b97\u5b50\u3068\u306f\uff1f\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\u57fa\u790e\u89e3\u8aac<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<p class=\"wp-block-paragraph\">3\u9805\u6f14\u7b97\u5b50\uff08\u4e09\u9805\u6f14\u7b97\u5b50\/\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u3082\u547c\u3070\u308c\u308b\uff09\u306f\u3001Java\u3067\u6761\u4ef6\u5206\u5c90\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\u3059\u308b\u305f\u3081\u306e\u6f14\u7b97\u5b50\u3067\u3059\u3002<code>\u6761\u4ef6\u5f0f ? \u771f\u306e\u5834\u5408\u306e\u5024 : \u507d\u306e\u5834\u5408\u306e\u5024<\/code> \u3068\u3044\u3046\u5f62\u5f0f\u3067\u8a18\u8ff0\u3055\u308c\u3001if-else\u6587\u30921\u884c\u3067\u8868\u73fe\u3067\u304d\u308b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">1.1  if-else\u6587\u3068\u306e\u9055\u3044\u304b\u3089\u308f\u304b\u308b3\u9805\u6f14\u7b97\u5b50\u306e\u7279\u5fb4<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-12\">\n<h4 class=\"wp-block-heading\" id=\"i-3\">\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\u306e\u6bd4\u8f03<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<p class=\"wp-block-paragraph\">\u5f93\u6765\u306eif-else\u6587\u306b\u3088\u308b\u6761\u4ef6\u5206\u5c90\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=\"\">int value;\nif (condition) {\n    value = 1;\n} else {\n    value = 2;\n}<\/pre>\n\n\n<div id=\"sgb-css-id-14\">\n<p class=\"wp-block-paragraph\">3\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\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=\"\">int value = condition ? 1 : 2;<\/pre>\n\n\n<div id=\"sgb-css-id-15\">\n<h4 class=\"wp-block-heading\" id=\"i-4\">\u4e3b\u306a\u7279\u5fb4<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-16\">\n<p class=\"wp-block-paragraph\">\u30001. <strong>\u5f0f\u3068\u3057\u3066\u8a55\u4fa1\u3055\u308c\u308b<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-17\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5909\u6570\u3078\u306e\u4ee3\u5165\u3084\u623b\u308a\u5024\u3068\u3057\u3066\u4f7f\u7528\u53ef\u80fd<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u3068\u3057\u3066\u76f4\u63a5\u4f7f\u7528\u53ef\u80fd<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-19\">\n<p class=\"wp-block-paragraph\">\u30002. <strong>\u5fc5\u305a\u5024\u3092\u8fd4\u3059<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-20\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf if-else\u6587\u3068\u7570\u306a\u308a\u3001\u5fc5\u305a\u4f55\u3089\u304b\u306e\u5024\u304c\u8fd4\u3055\u308c\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-21\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u4e21\u65b9\u306e\u5024\u304c\u9069\u5207\u306a\u578b\u3067\u3042\u308b\u3053\u3068\u304c\u30c1\u30a7\u30c3\u30af\u3055\u308c\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-22\">\n<p class=\"wp-block-paragraph\">\u30003. <strong><strong>1\u884c\u3067\u8a18\u8ff0\u53ef\u80fd<\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30b3\u30fc\u30c9\u306e\u8a18\u8ff0\u91cf\u304c\u6e1b\u5c11<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-25\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">1.2  3\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-26\">\n<h4 class=\"wp-block-heading\" id=\"i-6\">\u30e1\u30ea\u30c3\u30c8<\/h4>\n<\/div>\n\n<div id=\"id-548904e5-05a8-49f8-ad85-0ba6f0a0fc93\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u8aac\u660e<\/th><th>\u5177\u4f53\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055<\/td><td>\u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u30921\u884c\u3067\u8868\u73fe\u53ef\u80fd<\/td><td><code>String result = age &gt;= 20 ? \"\u6210\u4eba\" : \"\u672a\u6210\u5e74\";<\/code><\/td><\/tr><tr><td>\u53ef\u8aad\u6027\u5411\u4e0a<\/td><td>\u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u304c\u4e00\u76ee\u3067\u7406\u89e3\u53ef\u80fd<\/td><td><code>int max = a &gt; b ? a : b;<\/code><\/td><\/tr><tr><td>\u5f0f\u3068\u3057\u3066\u4f7f\u7528\u53ef\u80fd<\/td><td>\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306a\u3069\u3067\u3082\u76f4\u63a5\u4f7f\u7528\u53ef\u80fd<\/td><td><code>println(isValid ? \"OK\" : \"NG\");<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<h4 class=\"wp-block-heading\" id=\"i-7\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<p class=\"wp-block-paragraph\">\u30001. <strong>\u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u53ef\u8aad\u6027\u4f4e\u4e0b<\/strong><\/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=\"\">   \/\/ \u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u30cd\u30b9\u30c8\u306f\u907f\u3051\u308b\u3079\u304d\n   String result = a &gt; b ? \n                   x &gt; y ? \"Case 1\" : \"Case 2\" : \n                   z &gt; w ? \"Case 3\" : \"Case 4\";<\/pre>\n\n\n<div id=\"sgb-css-id-29\">\n<p class=\"wp-block-paragraph\">\u30002. <strong><strong>\u30c7\u30d0\u30c3\u30b0\u306e\u96e3\u3057\u3055<\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-30\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u306e\u8a2d\u5b9a\u304c\u96e3\u3057\u3044<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u6761\u4ef6\u5f0f\u3068\u5024\u306e\u5bfe\u5fdc\u95a2\u4fc2\u304c\u5206\u304b\u308a\u306b\u304f\u304f\u306a\u308b\u53ef\u80fd\u6027<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\n<p class=\"wp-block-paragraph\">\u30003. <strong>\u4fdd\u5b88\u6027\u3078\u306e\u5f71\u97ff<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-33\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u6761\u4ef6\u3084\u51e6\u7406\u304c\u5897\u3048\u305f\u5834\u5408\u306e\u4fee\u6b63\u304c\u56f0\u96e3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u306e\u78ba\u8a8d\u304c\u7169\u96d1\u306b\u306a\u308b\u53ef\u80fd\u6027<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-38\">\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\">\u4f7f\u7528\u3092\u63a8\u5968\u3059\u308b\u30b1\u30fc\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-35\">\n<li>\u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<li>\u5024\u306e\u9078\u629e\u306e\u307f\u3092\u884c\u3046\u5834\u5408<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-37\">\n<li>\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306e\u6761\u4ef6\u5206\u5c90<\/li>\n<\/div>\n\n\n<li>null\u30c1\u30a7\u30c3\u30af\u306b\u3088\u308b\u65e2\u5b9a\u5024\u306e\u8a2d\u5b9a<\/li>\n<\/ul>\n<\/div><\/div>\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:#ffb36b;color:#FFF\" class=\"sgb-box-simple__title\">\u907f\u3051\u308b\u3079\u304d\u30b1\u30fc\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#ffb36b;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-39\">\n<li>\u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5834\u5408<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-40\">\n<li>\u6761\u4ef6\u5206\u5c90\u5185\u3067\u8907\u96d1\u306a\u51e6\u7406\u3092\u884c\u3046\u5834\u5408<\/li>\n<\/div>\n\n\n<li>\u30cd\u30b9\u30c8\u304c\u5fc5\u8981\u306a\u6761\u4ef6\u5206\u5c90<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-41\">\n<h2 class=\"wp-block-heading\" id=\"i-8\">\uff12\uff0e3\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u6587\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-42\">\n<h3 class=\"wp-block-heading\" id=\"i-9\">2.1  3\u9805\u6f14\u7b97\u5b50\u306e\u69cb\u6587\u30eb\u30fc\u30eb<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-43\">\n<p class=\"wp-block-paragraph\">3\u9805\u6f14\u7b97\u5b50\u306f\u4ee5\u4e0b\u306e\u69cb\u6587\u3067\u4f7f\u7528\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=\"\">\u7d50\u679c\u306e\u578b \u5909\u6570 = \u6761\u4ef6\u5f0f ? \u771f\u306e\u5834\u5408\u306e\u5024 : \u507d\u306e\u5834\u5408\u306e\u5024;<\/pre>\n\n\n<div id=\"sgb-css-id-44\">\n<h4 class=\"wp-block-heading\" id=\"i-10\">\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\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=\"\">\/\/ \u6570\u5024\u306e\u6bd4\u8f03\nint larger = x &gt; y ? x : y;\n\n\/\/ \u6587\u5b57\u5217\u306e\u6761\u4ef6\u5206\u5c90\nString status = isActive ? \"\u52d5\u4f5c\u4e2d\" : \"\u505c\u6b62\u4e2d\";\n\n\/\/ boolean\u5024\u306e\u5909\u63db\nString result = flag ? \"Yes\" : \"No\";<\/pre>\n\n\n<div id=\"sgb-css-id-45\">\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u69cb\u6587\u4e0a\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p class=\"wp-block-paragraph\">\u30001. <strong>\u6761\u4ef6\u5f0f<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5fc5\u305aboolean\u578b\uff08true\/false\uff09\u3092\u8fd4\u3059\u5f0f\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-48\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u6bd4\u8f03\u6f14\u7b97\u5b50\uff08<code>&gt;<\/code>, <code>&lt;<\/code>, <code>==<\/code>, <code>!=<\/code>\u306a\u3069\uff09\u3084\u8ad6\u7406\u6f14\u7b97\u5b50\uff08<code>&amp;&amp;<\/code>, <code>||<\/code>\uff09\u304c\u4f7f\u7528\u53ef\u80fd<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-49\">\n<p class=\"wp-block-paragraph\">\u30002. <strong>\u30b3\u30ed\u30f3\uff08:\uff09\u3068\u30af\u30a8\u30b9\u30c1\u30e7\u30f3\u30de\u30fc\u30af\uff08?\uff09\u306e\u4f7f\u7528<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-50\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5fc5\u305a\u4e21\u65b9\u306e\u8a18\u53f7\u3092\u4f7f\u7528\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-51\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u8a18\u53f7\u306e\u9806\u5e8f\u306f\u5fc5\u305a <code>?<\/code> \u304c\u5148\u3001<code>:<\/code> \u304c\u5f8c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<p class=\"wp-block-paragraph\">\u30003. <strong><strong>\u62ec\u5f27\u306e\u4f7f\u7528<\/strong><\/strong><\/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=\"\">   \/\/ \u8907\u96d1\u306a\u6761\u4ef6\u5f0f\u306f\u62ec\u5f27\u3067\u56f2\u3080\u3053\u3068\u3092\u63a8\u5968\n   int value = (a &gt; b &amp;&amp; c &lt; d) ? x : y;\n\n   \/\/ \u6f14\u7b97\u3092\u542b\u3080\u5834\u5408\u3082\u62ec\u5f27\u3092\u4f7f\u7528\n   int result = (a + b &gt; c) ? (x + y) : (p + q);<\/pre>\n\n\n<div id=\"sgb-css-id-53\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">2.2 \u623b\u308a\u5024\u306e\u578b\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<h4 class=\"wp-block-heading\" id=\"i-13\">\u578b\u306e\u4e00\u81f4\u898f\u5247<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<p class=\"wp-block-paragraph\">\u30001. <strong>\u57fa\u672c\u578b\u306e\u5834\u5408<\/strong><\/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=\"\">   \/\/ \u540c\u3058\u578b\u540c\u58eb\u306e\u6bd4\u8f03\n   int result = condition ? 1 : 2;              \/\/ OK\n   double value = condition ? 1.5 : 2.0;        \/\/ OK\n\n   \/\/ \u6697\u9ed9\u306e\u578b\u5909\u63db\u304c\u53ef\u80fd\u306a\u5834\u5408\n   double result = condition ? 1 : 2.5;         \/\/ OK\uff08int\u304b\u3089double\u3078\u306e\u5909\u63db\uff09\n   long value = condition ? 10 : 20L;           \/\/ OK\uff08int\u304b\u3089long\u3078\u306e\u5909\u63db\uff09<\/pre>\n\n\n<div id=\"sgb-css-id-56\">\n<p class=\"wp-block-paragraph\">\u30002. <strong><strong>\u53c2\u7167\u578b\u306e\u5834\u5408<\/strong><\/strong><\/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=\"\">   \/\/ \u540c\u3058\u30af\u30e9\u30b9\u578b\u540c\u58eb\n   String text = condition ? \"YES\" : \"NO\";      \/\/ OK\n\n   \/\/ \u7d99\u627f\u95a2\u4fc2\u304c\u3042\u308b\u5834\u5408\n   Object obj = condition ? new String(\"A\") : new Integer(1);  \/\/ OK\n\n   \/\/ \u4e92\u63db\u6027\u306e\u306a\u3044\u578b\u306e\u5834\u5408\n   String invalid = condition ? \"text\" : 123;    \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/pre>\n\n\n<div id=\"sgb-css-id-57\">\n<h4 class=\"wp-block-heading\" id=\"i-14\">\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-58\">\n<p class=\"wp-block-paragraph\">\u30001. <strong><strong><strong>\u578b\u306e\u4e0d\u4e00\u81f4<\/strong><\/strong><\/strong><\/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=\"\">   \/\/ \u30a8\u30e9\u30fc\u306e\u4f8b\n   String result = condition ? \"text\" : 123;     \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\n\n   \/\/ \u4fee\u6b63\u4f8b\n   String result = condition ? \"text\" : \"123\";   \/\/ OK<\/pre>\n\n\n<div id=\"sgb-css-id-59\">\n<p class=\"wp-block-paragraph\">\u30002. <strong><strong><strong><strong>null\u306e\u6271\u3044<\/strong><\/strong><\/strong><\/strong><\/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=\"\">   \/\/ OK: \u3069\u3061\u3089\u3082null\u8a31\u5bb9\u306e\u53c2\u7167\u578b\n   String result = condition ? null : \"text\";\n\n   \/\/ \u30a8\u30e9\u30fc: \u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306fnull\u3092\u53d7\u3051\u4ed8\u3051\u306a\u3044\n   int value = condition ? null : 0;  \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\n\n   \/\/ \u4fee\u6b63\u4f8b: \u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u3092\u4f7f\u7528\n   Integer value = condition ? null : 0;  \/\/ OK<\/pre>\n\n\n<div id=\"sgb-css-id-60\">\n<p class=\"wp-block-paragraph\">\u30003. <strong><strong><strong><strong><strong>\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d<\/strong><\/strong><\/strong><\/strong><\/strong><\/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=\"\">   \/\/ \u8aa4\u3063\u305f\u4f8b\uff08\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u306e\u554f\u984c\uff09\n   int result = a + b &gt; c ? x : y;\n\n   \/\/ \u6b63\u3057\u3044\u4f8b\uff08\u62ec\u5f27\u3067\u660e\u793a\u7684\u306b\u30b0\u30eb\u30fc\u30d7\u5316\uff09\n   int result = (a + b &gt; c) ? x : y;<\/pre>\n\n\n<div id=\"sgb-css-id-61\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u30eb\u30fc\u30eb\u3068\u6ce8\u610f\u70b9\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u30013\u9805\u6f14\u7b97\u5b50\u3092\u9069\u5207\u306b\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u578b\u306e\u4e00\u81f4\u306b\u3064\u3044\u3066\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30a8\u30e9\u30fc\u3092\u9632\u3050\u305f\u3081\u306b\u91cd\u8981\u306a\u70b9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<h2 class=\"wp-block-heading\" id=\"i-15\">\uff13\uff0e\u5b9f\u8df5\u3067\u4f7f\u3048\u308b3\u9805\u6f14\u7b97\u5b50\u306e\u5177\u4f53\u4f8b15\u9078<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">3.1 \u6570\u5024\u3092\u6bd4\u8f03\u3059\u308b\u5834\u5408\u306e\u4f7f\u7528\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<h4 class=\"wp-block-heading\" id=\"i-17\">1. \u6700\u5927\u5024\u30fb\u6700\u5c0f\u5024\u306e\u53d6\u5f97<\/h4>\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=\"\">\/\/ 2\u3064\u306e\u6570\u5024\u306e\u6700\u5927\u5024\u3092\u53d6\u5f97\nint max = a &gt; b ? a : b;\n\n\/\/ 2\u3064\u306e\u6570\u5024\u306e\u6700\u5c0f\u5024\u3092\u53d6\u5f97\nint min = a &lt; b ? a : b;\n\n\/\/ 3\u3064\u306e\u6570\u5024\u306e\u6700\u5927\u5024\u3092\u53d6\u5f97\uff08\u30cd\u30b9\u30c8\u306f\u63a7\u3048\u3081\u306b\uff09\nint maxOfThree = a &gt; b ? (a &gt; c ? a : c) : (b &gt; c ? b : c);<\/pre>\n\n\n<div id=\"sgb-css-id-65\">\n<h4 class=\"wp-block-heading\" id=\"i-18\">2. \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u3068\u5024\u306e\u6b63\u898f\u5316<\/h4>\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=\"\">\/\/ \u5024\u30920-100\u306e\u7bc4\u56f2\u306b\u53ce\u3081\u308b\nint normalized = value &lt; 0 ? 0 : (value &gt; 100 ? 100 : value);\n\n\/\/ \u6b63\u8ca0\u306e\u5224\u5b9a\u3068\u7d76\u5bfe\u5024\u306e\u53d6\u5f97\nint absValue = number &lt; 0 ? -number : number;\n\n\/\/ \u5076\u6570\u30fb\u5947\u6570\u306e\u5224\u5b9a\nString evenOdd = num % 2 == 0 ? \"\u5076\u6570\" : \"\u5947\u6570\";<\/pre>\n\n\n<div id=\"sgb-css-id-66\">\n<h4 class=\"wp-block-heading\" id=\"i-19\">3. \u6570\u5024\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406<\/h4>\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=\"\">\/\/ \u6570\u5024\u306e\u8868\u793a\u6841\u6570\u306e\u5236\u5fa1\nString formatted = value &lt; 10 ? \"0\" + value : String.valueOf(value);\n\n\/\/ \u7b26\u53f7\u4ed8\u304d\u6570\u5024\u306e\u8868\u793a\nString signedNum = value &gt; 0 ? \"+\" + value : String.valueOf(value);<\/pre>\n\n\n<div id=\"sgb-css-id-67\">\n<h3 class=\"wp-block-heading\" id=\"i-20\">3.2 \u6587\u5b57\u5217\u3092\u64cd\u4f5c\u3059\u308b\u5834\u5408\u306e\u4f7f\u7528\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-68\">\n<h4 class=\"wp-block-heading\" id=\"i-21\">4. \u6587\u5b57\u5217\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af<\/h4>\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=\"\">\/\/ \u6587\u5b57\u5217\u306e\u7a7a\u30c1\u30a7\u30c3\u30af\nString result = str.isEmpty() ? \"\u7a7a\u6587\u5b57\u3067\u3059\" : str;\n\n\/\/ \u6587\u5b57\u5217\u306e\u9577\u3055\u30c1\u30a7\u30c3\u30af\nString display = str.length() &gt; 10 ? str.substring(0, 10) + \"...\" : str;<\/pre>\n\n\n<div id=\"sgb-css-id-69\">\n<h4 class=\"wp-block-heading\" id=\"i-22\">5. \u6587\u5b57\u5217\u306e\u6761\u4ef6\u4ed8\u304d\u9023\u7d50<\/h4>\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=\"\">\/\/ \u30bf\u30a4\u30c8\u30eb\u3078\u306e\u63a5\u982d\u8f9e\u4ed8\u52a0\nString title = isNew ? \"New! \" + baseTitle : baseTitle;\n\n\/\/ \u6761\u4ef6\u4ed8\u304d\u306e\u30bb\u30d1\u30ec\u30fc\u30bf\u8ffd\u52a0\nString path = isWindows ? dir + \"\\\\\" + file : dir + \"\/\" + file;<\/pre>\n\n\n<div id=\"sgb-css-id-70\">\n<h4 class=\"wp-block-heading\" id=\"i-23\">6. \u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u52d5\u7684\u751f\u6210<\/h4>\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=\"\">\/\/ \u30b9\u30c6\u30fc\u30bf\u30b9\u306b\u5fdc\u3058\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\nString message = isSuccess ? \"\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u307e\u3057\u305f\" : \"\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\";\n\n\/\/ \u8a00\u8a9e\u8a2d\u5b9a\u306b\u5fdc\u3058\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\nString greeting = isJapanese ? \"\u3053\u3093\u306b\u3061\u306f\" : \"Hello\";<\/pre>\n\n\n<div id=\"sgb-css-id-71\">\n<h3 class=\"wp-block-heading\" id=\"i-24\">3.3 null\u30c1\u30a7\u30c3\u30af\u3067\u306e\u6d3b\u7528\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<h4 class=\"wp-block-heading\" id=\"i-25\">7. null\u30c1\u30a7\u30c3\u30af\u3068\u65e2\u5b9a\u5024\u306e\u8a2d\u5b9a<\/h4>\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=\"\">\/\/ \u57fa\u672c\u7684\u306anull\u30c1\u30a7\u30c3\u30af\nString value = str != null ? str : \"\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\";\n\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u30a2\u30af\u30bb\u30b9\nString name = user != null ? user.getName() : \"\u540d\u7121\u3057\u3055\u3093\";<\/pre>\n\n\n<div id=\"sgb-css-id-73\">\n<h4 class=\"wp-block-heading\" id=\"i-26\">8. \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u3067\u306enull\u30c1\u30a7\u30c3\u30af<\/h4>\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=\"\">\/\/ \u30ea\u30b9\u30c8\u306enull\u30c1\u30a7\u30c3\u30af\u3068\u7a7a\u30c1\u30a7\u30c3\u30af\nint size = list != null ? list.size() : 0;\n\n\/\/ \u30de\u30c3\u30d7\u306e\u5024\u53d6\u5f97\u6642\u306enull\u30c1\u30a7\u30c3\u30af\nString value = map != null ? map.get(key) : \"\u672a\u8a2d\u5b9a\";<\/pre>\n\n\n<div id=\"sgb-css-id-74\">\n<h4 class=\"wp-block-heading\" id=\"i-27\">9. \u8907\u6570\u6761\u4ef6\u3067\u306enull\u30c1\u30a7\u30c3\u30af<\/h4>\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=\"\">\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u968e\u5c64\u7684\u306anull\u30c1\u30a7\u30c3\u30af\nString dept = employee != null &amp;&amp; employee.getDepartment() != null ? \n              employee.getDepartment().getName() : \"\u90e8\u7f72\u672a\u8a2d\u5b9a\";\n\n\/\/ \u914d\u5217\u8981\u7d20\u306enull\u30c1\u30a7\u30c3\u30af\nString firstElement = array != null &amp;&amp; array.length &gt; 0 ? array[0] : \"\";<\/pre>\n\n\n<div id=\"sgb-css-id-75\">\n<h4 class=\"wp-block-heading\" id=\"i-28\">10. \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\u3057\u305fnull\u30c1\u30a7\u30c3\u30af<\/h4>\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=\"\">\/\/ \u6570\u5024\u578b\u306enull\u30c1\u30a7\u30c3\u30af\nInteger value = num != null ? num : 0;\n\n\/\/ \u65e5\u4ed8\u306enull\u30c1\u30a7\u30c3\u30af\nDate date = inputDate != null ? inputDate : new Date();<\/pre>\n\n\n<div id=\"sgb-css-id-76\">\n<h4 class=\"wp-block-heading\" id=\"i-29\">11. \u6761\u4ef6\u4ed8\u304d\u306e\u51e6\u7406\u5b9f\u884c<\/h4>\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=\"\">\/\/ \u30ed\u30b0\u51fa\u529b\u306e\u6761\u4ef6\u5236\u5fa1\nString log = isDebug ? \"DetailLog: \" + message : \"Log: \" + message;\n\n\/\/ \u51e6\u7406\u7d50\u679c\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\nString result = isSuccess ? formatSuccess(data) : formatError(error);<\/pre>\n\n\n<div id=\"sgb-css-id-77\">\n<h4 class=\"wp-block-heading\" id=\"i-30\">12. \u30d5\u30e9\u30b0\u306b\u57fa\u3065\u304f\u5024\u306e\u8a2d\u5b9a<\/h4>\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=\"\">\/\/ \u72b6\u614b\u30d5\u30e9\u30b0\u306b\u3088\u308b\u5024\u306e\u5207\u308a\u66ff\u3048\nint status = isActive ? STATUS_ACTIVE : STATUS_INACTIVE;\n\n\/\/ \u6a29\u9650\u30d5\u30e9\u30b0\u306b\u3088\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u8a2d\u5b9a\nString message = isAdmin ? \"\u7ba1\u7406\u8005\u753b\u9762\u3067\u3059\" : \"\u4e00\u822c\u30e6\u30fc\u30b6\u30fc\u753b\u9762\u3067\u3059\";<\/pre>\n\n\n<div id=\"sgb-css-id-78\">\n<h4 class=\"wp-block-heading\" id=\"i-31\">13. \u8a08\u7b97\u7d50\u679c\u306e\u6761\u4ef6\u5206\u5c90<\/h4>\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=\"\">\/\/ \u5272\u308a\u7b97\u306e\u7d50\u679c\u51e6\u7406\uff08\u30bc\u30ed\u9664\u7b97\u5bfe\u7b56\uff09\ndouble result = denominator != 0 ? numerator \/ denominator : 0.0;\n\n\/\/ \u30d1\u30fc\u30bb\u30f3\u30c6\u30fc\u30b8\u306e\u8a08\u7b97\nint percentage = total != 0 ? (count * 100) \/ total : 0;<\/pre>\n\n\n<div id=\"sgb-css-id-79\">\n<h4 class=\"wp-block-heading\" id=\"i-32\">14. \u8868\u793a\u7528\u30c6\u30ad\u30b9\u30c8\u306e\u751f\u6210<\/h4>\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=\"\">\/\/ \u4ef6\u6570\u8868\u793a\u306e\u5236\u5fa1\nString display = count == 0 ? \"\u30c7\u30fc\u30bf\u306a\u3057\" : count + \"\u4ef6\u306e\u30c7\u30fc\u30bf\";\n\n\/\/ \u72b6\u614b\u8868\u793a\u306e\u5207\u308a\u66ff\u3048\nString status = isEnabled ? \"\u6709\u52b9\" : isExpired ? \"\u671f\u9650\u5207\u308c\" : \"\u7121\u52b9\";<\/pre>\n\n\n<div id=\"sgb-css-id-80\">\n<h4 class=\"wp-block-heading\" id=\"i-33\">15. \u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u5024\u306e\u53d6\u5f97<\/h4>\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=\"\">\/\/ \u74b0\u5883\u5909\u6570\u306e\u53d6\u5f97\nString config = System.getenv(\"APP_MODE\") != null ? \n                System.getenv(\"APP_MODE\") : \"development\";\n\n\/\/ \u30d7\u30ed\u30d1\u30c6\u30a3\u5024\u306e\u53d6\u5f97\nString setting = properties.getProperty(\"key\") != null ? \n                 properties.getProperty(\"key\") : \"default\";<\/pre>\n\n\n<div id=\"sgb-css-id-81\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u5b9f\u8df5\u4f8b\u306f\u3001\u5b9f\u52d9\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u5834\u9762\u3067\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u8907\u96d1\u306a\u6761\u4ef6\u3084\u591a\u91cd\u306e\u30cd\u30b9\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u901a\u5e38\u306eif-else\u6587\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-82\">\n<h2 class=\"wp-block-heading\" id=\"i-34\">\uff14\uff0e3\u9805\u6f14\u7b97\u5b50\u306e\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3068\u907f\u3051\u308b\u3079\u304d\u4f7f\u7528\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-83\">\n<h3 class=\"wp-block-heading\" id=\"i-35\">4.1 \u30cd\u30b9\u30c8\u3057\u305f3\u9805\u6f14\u7b97\u5b50\u306e\u554f\u984c\u70b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\n<h4 class=\"wp-block-heading\" id=\"i-36\">1. \u6df1\u3044\u30cd\u30b9\u30c8\u306b\u3088\u308b\u53ef\u8aad\u6027\u306e\u4f4e\u4e0b<\/h4>\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u6df1\u3044\u30cd\u30b9\u30c8\u306b\u3088\u308a\u7406\u89e3\u304c\u56f0\u96e3\nString result = a &gt; b \n    ? x &gt; y \n        ? \"Case 1\" \n        : z &gt; w \n            ? \"Case 2\" \n            : \"Case 3\" \n    : \"Case 4\";\n\n\/\/ \u826f\u3044\u4f8b\uff1aif-else\u6587\u3092\u4f7f\u7528\u3057\u305f\u660e\u78ba\u306a\u5206\u5c90\nif (a &gt; b) {\n    if (x &gt; y) {\n        result = \"Case 1\";\n    } else if (z &gt; w) {\n        result = \"Case 2\";\n    } else {\n        result = \"Case 3\";\n    }\n} else {\n    result = \"Case 4\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-85\">\n<h4 class=\"wp-block-heading\" id=\"i-37\">2. \u8907\u96d1\u306a\u6761\u4ef6\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u6761\u4ef6\u5f0f\u304c\u8907\u96d1\u3067\u7406\u89e3\u304c\u56f0\u96e3\nString status = (user != null &amp;&amp; user.isActive()) \n    ? (user.getRole() != null &amp;&amp; user.getRole().equals(\"ADMIN\")) \n        ? \"\u7ba1\u7406\u8005\" \n        : \"\u4e00\u822c\u30e6\u30fc\u30b6\u30fc\" \n    : \"\u672a\u767b\u9332\";\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u6761\u4ef6\u3092\u5206\u89e3\u3057\u3066\u660e\u78ba\u306b\u8868\u73fe\nif (user == null || !user.isActive()) {\n    status = \"\u672a\u767b\u9332\";\n} else if (user.getRole() != null &amp;&amp; user.getRole().equals(\"ADMIN\")) {\n    status = \"\u7ba1\u7406\u8005\";\n} else {\n    status = \"\u4e00\u822c\u30e6\u30fc\u30b6\u30fc\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-86\">\n<h4 class=\"wp-block-heading\" id=\"i-38\">3. \u526f\u4f5c\u7528\u3092\u542b\u3080\u51e6\u7406<\/h4>\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u526f\u4f5c\u7528\u3092\u542b\u3080\u51e6\u7406\u30923\u9805\u6f14\u7b97\u5b50\u3067\u8a18\u8ff0\nint result = isValid \n    ? (counter++, processValue(value)) \n    : (errorCount++, getDefaultValue());\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u51e6\u7406\u3092\u660e\u78ba\u306b\u5206\u96e2\nif (isValid) {\n    counter++;\n    result = processValue(value);\n} else {\n    errorCount++;\n    result = getDefaultValue();\n}<\/pre>\n\n\n<div id=\"sgb-css-id-87\">\n<h3 class=\"wp-block-heading\" id=\"i-39\">4.2 \u904e\u5ea6\u306a\u4f7f\u7528\u306b\u3088\u308b\u53ef\u8aad\u6027\u306e\u4f4e\u4e0b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-88\">\n<h4 class=\"wp-block-heading\" id=\"i-40\">1. \u4e0d\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762<\/h4>\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u5358\u7d14\u306aboolean\u5024\u306e\u4ee3\u5165\nboolean isAdult = age &gt;= 20 ? true : false;\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u76f4\u63a5\u6761\u4ef6\u5f0f\u3092\u4f7f\u7528\nboolean isAdult = age &gt;= 20;<\/pre>\n\n\n<div id=\"sgb-css-id-89\">\n<h4 class=\"wp-block-heading\" id=\"i-41\">2. \u5197\u9577\u306a\u6761\u4ef6\u5206\u5c90<\/h4>\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u5197\u9577\u306a\u6761\u4ef6\u5206\u5c90\nString message = condition \n    ? \"TRUE\" \n    : condition2 \n        ? \"MAYBE\" \n        : condition3 \n            ? \"PERHAPS\" \n            : \"FALSE\";\n\n\/\/ \u826f\u3044\u4f8b\uff1aswitch\u6587\u3084if-else\u6587\u3092\u4f7f\u7528\nString getMessage() {\n    if (condition) return \"TRUE\";\n    if (condition2) return \"MAYBE\";\n    if (condition3) return \"PERHAPS\";\n    return \"FALSE\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-90\">\n<h4 class=\"wp-block-heading\" id=\"i-42\">3. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3067\u306e\u4f7f\u7528<\/h4>\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u8907\u96d1\u306a\u51e6\u7406\nString result = optional.isPresent() \n    ? optional.get().process().getResult().toString() \n    : Optional.empty().orElse(\"default\");\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u51e6\u7406\u3092\u5206\u5272\u3057\u3066\u660e\u78ba\u306b\u8868\u73fe\nString result;\nif (optional.isPresent()) {\n    Result processed = optional.get().process();\n    result = processed.getResult().toString();\n} else {\n    result = \"default\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-91\">\n<h4 class=\"wp-block-heading\" id=\"i-43\">\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<p class=\"wp-block-paragraph\">\u30001. <strong>\u8907\u96d1\u6027\u306e\u5236\u9650<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf 3\u9805\u6f14\u7b97\u5b50\u306e\u30cd\u30b9\u30c8\u306f\u6700\u59271\u968e\u5c64\u307e\u3067<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u6761\u4ef6\u5f0f\u306f\u5358\u7d14\u306b\u4fdd\u3064<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u8907\u96d1\u306a\u51e6\u7406\u306f\u5f93\u6765\u306eif-else\u6587\u3092\u4f7f\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<p class=\"wp-block-paragraph\" id=\"block-e58911fc-4b80-4dc5-ac38-2df5864ebf14\">\u30002. <strong><strong>\u53ef\u8aad\u6027\u306e\u512a\u5148<\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<p class=\"wp-block-paragraph\" id=\"block-6f994009-97ee-4dad-a13c-718f4ff4c10e\">\u3000\u3000\u25cf \u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u4f1d\u308f\u308b\u5834\u5408\u306e\u307f\u4f7f\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<p class=\"wp-block-paragraph\" id=\"block-ff56d7ca-e1f0-47a8-abec-186e842ddf09\">\u3000\u3000\u25cf \u30c1\u30fc\u30e0\u5185\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306b\u5f93\u3046<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<p class=\"wp-block-paragraph\" id=\"block-66f3f805-fad2-4dc5-9be3-c5d2f55ef3d4\">\u3000\u3000\u25cf \u30ec\u30d3\u30e5\u30fc\u3057\u3084\u3059\u3055\u3092\u91cd\u8996<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-100\">\n<p class=\"wp-block-paragraph\" id=\"block-e58911fc-4b80-4dc5-ac38-2df5864ebf14\">\u30003. <strong><strong><strong>\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762\u306e\u9078\u629e<\/strong><\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"id-44bc2ba7-f078-4dfa-9614-4169fb6153f3\"><div id=\"sgb-css-id-101\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762<\/th><th>\u4e0d\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762<\/th><\/tr><\/thead><tbody><tr><td>\u5358\u7d14\u306a\u5024\u306e\u9078\u629e<\/td><td>\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90<\/td><\/tr><tr><td>null\u30c1\u30a7\u30c3\u30af<\/td><td>\u526f\u4f5c\u7528\u3092\u542b\u3080\u51e6\u7406<\/td><\/tr><tr><td>\u30d5\u30e9\u30b0\u306b\u3088\u308b\u5207\u308a\u66ff\u3048<\/td><td>\u6df1\u3044\u30cd\u30b9\u30c8<\/td><\/tr><tr><td>\u5358\u4e00\u306e\u623b\u308a\u5024\u8a2d\u5b9a<\/td><td>\u8907\u6570\u306e\u51e6\u7406\u306e\u5b9f\u884c<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-102\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3092\u8a8d\u8b58\u3057\u3001\u9069\u5207\u306a\u4ee3\u66ff\u624b\u6bb5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u9ad8\u3044\u3001\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\n<h2 class=\"wp-block-heading\" id=\"i-44\">\uff15\uff0e3\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u30b3\u30fc\u30c9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f8b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-104\">\n<h3 class=\"wp-block-heading\" id=\"i-45\">5.1 if-else\u6587\u304b\u30893\u9805\u6f14\u7b97\u5b50\u3078\u306e\u66f8\u304d\u63db\u3048\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<h4 class=\"wp-block-heading\" id=\"i-46\">1. \u57fa\u672c\u7684\u306a\u5909\u63db\u30d1\u30bf\u30fc\u30f3<\/h4>\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=\"\">\/\/ \u5909\u63db\u524d\uff1a\u5358\u7d14\u306aif-else\u6587\npublic String getDisplayStatus(boolean isActive) {\n    if (isActive) {\n        return \"\u6709\u52b9\";\n    } else {\n        return \"\u7121\u52b9\";\n    }\n}\n\n\/\/ \u5909\u63db\u5f8c\uff1a3\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\npublic String getDisplayStatus(boolean isActive) {\n    return isActive ? \"\u6709\u52b9\" : \"\u7121\u52b9\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-106\">\n<h4 class=\"wp-block-heading\" id=\"i-47\">2. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u6700\u9069\u5316<\/h4>\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=\"\">\/\/ \u5909\u63db\u524d\uff1a\u6761\u4ef6\u5206\u5c90\u3092\u542b\u3080\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\npublic String processValue(String value) {\n    if (value != null) {\n        return value.trim().toLowerCase();\n    } else {\n        return \"\";\n    }\n}\n\n\/\/ \u5909\u63db\u5f8c\uff1a3\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u7c21\u6f54\u306a\u8868\u73fe\npublic String processValue(String value) {\n    return value != null ? value.trim().toLowerCase() : \"\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-107\">\n<h4 class=\"wp-block-heading\" id=\"i-48\">3. \u5909\u6570\u4ee3\u5165\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/h4>\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=\"\">\/\/ \u5909\u63db\u524d\uff1a\u5909\u6570\u4ee3\u5165\u3092\u542b\u3080\u6761\u4ef6\u5206\u5c90\npublic void setUserType(User user) {\n    String type;\n    if (user.getAge() &gt;= 20) {\n        type = \"ADULT\";\n    } else {\n        type = \"MINOR\";\n    }\n    user.setType(type);\n}\n\n\/\/ \u5909\u63db\u5f8c\uff1a\u76f4\u63a5\u4ee3\u5165\u3067\u306e3\u9805\u6f14\u7b97\u5b50\u4f7f\u7528\npublic void setUserType(User user) {\n    user.setType(user.getAge() &gt;= 20 ? \"ADULT\" : \"MINOR\");\n}<\/pre>\n\n\n<div id=\"sgb-css-id-108\">\n<h3 class=\"wp-block-heading\" id=\"i-49\">5.2 \u53ef\u8aad\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3059\u308b\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-109\">\n<h4 class=\"wp-block-heading\" id=\"i-50\">1. \u6761\u4ef6\u5f0f\u306e\u62bd\u51fa\u306b\u3088\u308b\u53ef\u8aad\u6027\u5411\u4e0a<\/h4>\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=\"\">\/\/ \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\uff1a\u8907\u96d1\u306a\u6761\u4ef6\u5f0f\nreturn user.getAge() &gt;= 20 &amp;&amp; user.hasValidId() &amp;&amp; !user.isBlocked() \n    ? \"\u30a2\u30af\u30bb\u30b9\u8a31\u53ef\" : \"\u30a2\u30af\u30bb\u30b9\u62d2\u5426\";\n\n\/\/ \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c\uff1a\u6761\u4ef6\u5f0f\u3092\u62bd\u51fa\nprivate boolean isAccessible(User user) {\n    return user.getAge() &gt;= 20 &amp;&amp; \n           user.hasValidId() &amp;&amp; \n           !user.isBlocked();\n}\n\n\/\/ \u4f7f\u7528\u6642\nreturn isAccessible(user) ? \"\u30a2\u30af\u30bb\u30b9\u8a31\u53ef\" : \"\u30a2\u30af\u30bb\u30b9\u62d2\u5426\";<\/pre>\n\n\n<div id=\"sgb-css-id-110\">\n<h4 class=\"wp-block-heading\" id=\"i-51\">2. \u30e1\u30bd\u30c3\u30c9\u62bd\u51fa\u306b\u3088\u308b\u30ed\u30b8\u30c3\u30af\u306e\u6574\u7406<\/h4>\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=\"\">\/\/ \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\uff1a\u8907\u6570\u306e\u51e6\u7406\u3092\u542b\u3080\u6761\u4ef6\u5206\u5c90\nif (product.getStock() &gt; 0 &amp;&amp; product.isActive()) {\n    price = product.getPrice() * (1 - discount);\n    status = \"\u8cfc\u5165\u53ef\u80fd\";\n} else {\n    price = 0;\n    status = \"\u5728\u5eab\u306a\u3057\";\n}\n\n\/\/ \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c\uff1a\u51e6\u7406\u3092\u5206\u5272\u3057\u30663\u9805\u6f14\u7b97\u5b50\u3092\u9069\u5207\u306b\u4f7f\u7528\nprivate boolean isAvailable(Product product) {\n    return product.getStock() &gt; 0 &amp;&amp; product.isActive();\n}\n\nprivate double calculatePrice(Product product, double discount) {\n    return isAvailable(product) \n        ? product.getPrice() * (1 - discount) \n        : 0;\n}\n\nprivate String getStatus(Product product) {\n    return isAvailable(product) ? \"\u8cfc\u5165\u53ef\u80fd\" : \"\u5728\u5eab\u306a\u3057\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-111\">\n<h4 class=\"wp-block-heading\" id=\"i-52\">3. Null\u5b89\u5168\u6027\u3092\u8003\u616e\u3057\u305f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/h4>\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=\"\">\/\/ \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\uff1aNull\u30c1\u30a7\u30c3\u30af\u3092\u542b\u3080\u6761\u4ef6\u5206\u5c90\nString getUserName(User user) {\n    if (user == null) {\n        return \"\u30b2\u30b9\u30c8\";\n    } else {\n        if (user.getName() == null || user.getName().isEmpty()) {\n            return \"\u540d\u7121\u3057\u3055\u3093\";\n        } else {\n            return user.getName();\n        }\n    }\n}\n\n\/\/ \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5f8c\uff1a3\u9805\u6f14\u7b97\u5b50\u3068\u30e1\u30bd\u30c3\u30c9\u62bd\u51fa\u3092\u7d44\u307f\u5408\u308f\u305b\nprivate String getDefaultName(User user) {\n    return user != null &amp;&amp; user.getName() != null &amp;&amp; !user.getName().isEmpty() \n        ? user.getName() \n        : \"\u540d\u7121\u3057\u3055\u3093\";\n}\n\nString getUserName(User user) {\n    return user != null ? getDefaultName(user) : \"\u30b2\u30b9\u30c8\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-112\">\n<h4 class=\"wp-block-heading\" id=\"i-53\">\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u6642\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-113\">\n<p class=\"wp-block-paragraph\">\u30001. <strong>\u6bb5\u968e\u7684\u306a\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u4e00\u5ea6\u306b\u5927\u304d\u306a\u5909\u66f4\u3092\u884c\u308f\u306a\u3044<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-115\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5404\u30b9\u30c6\u30c3\u30d7\u3067\u30c6\u30b9\u30c8\u3092\u5b9f\u884c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-116\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5909\u66f4\u306e\u5f71\u97ff\u7bc4\u56f2\u3092\u628a\u63e1<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<p class=\"wp-block-paragraph\">\u30002. <strong><strong>\u53ef\u8aad\u6027\u306e\u512a\u5148\u9806\u4f4d<\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"id-ccdb5d62-fbad-4e17-901f-0e886f92e850\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u512a\u5148\u5ea6<\/th><th>\u5bfe\u5fdc\u65b9\u91dd<\/th><\/tr><\/thead><tbody><tr><td>\u9ad8<\/td><td>\u6761\u4ef6\u5f0f\u306e\u62bd\u51fa<\/td><\/tr><tr><td>\u4e2d<\/td><td>\u30e1\u30bd\u30c3\u30c9\u306e\u5206\u5272<\/td><\/tr><tr><td>\u4f4e<\/td><td>\u30b3\u30fc\u30c9\u306e\u77ed\u7e2e<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n<div id=\"sgb-css-id-118\">\n<p class=\"wp-block-paragraph\">\u30003. <strong><strong><strong>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u5224\u65ad\u57fa\u6e96<\/strong><\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-119\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308b\u304b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-120\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306b\u306a\u308b\u304b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-121\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3059\u308b\u304b<\/p>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30c1\u30fc\u30e0\u5185\u3067\u306e\u7406\u89e3\u304c\u5bb9\u6613\u306b\u306a\u308b\u304b<\/p>\n\n\n<div id=\"sgb-css-id-122\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f8b\u3092\u53c2\u8003\u306b\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u6539\u5584\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<h2 class=\"wp-block-heading\" id=\"i-54\">\uff16\uff0e\u5fdc\u7528\uff1aStreamAPI\u3068\u7d44\u307f\u5408\u308f\u305b\u305f3\u9805\u6f14\u7b97\u5b50\u306e\u6d3b\u7528<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-124\">\n<h3 class=\"wp-block-heading\" id=\"i-55\">6.1 \u30e9\u30e0\u30c0\u5f0f\u3067\u306e3\u9805\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-125\">\n<h4 class=\"wp-block-heading\" id=\"i-56\">1. Stream\u64cd\u4f5c\u3067\u306e\u6761\u4ef6\u4ed8\u304d\u30de\u30c3\u30d4\u30f3\u30b0<\/h4>\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=\"\">\/\/ \u30ea\u30b9\u30c8\u306e\u8981\u7d20\u3092\u6761\u4ef6\u306b\u5fdc\u3058\u3066\u5909\u63db\nList&lt;String&gt; results = items.stream()\n    .map(item -&gt; item.getScore() &gt; 80 ? \"Excellent\" : \"Normal\")\n    .collect(Collectors.toList());\n\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6761\u4ef6\u4ed8\u304d\u5909\u63db\nList&lt;UserDTO&gt; userDtos = users.stream()\n    .map(user -&gt; new UserDTO(\n        user.getName(),\n        user.getAge() &gt;= 20 ? \"\u6210\u4eba\" : \"\u672a\u6210\u5e74\",\n        user.getStatus().isActive() ? \"\u6709\u52b9\" : \"\u7121\u52b9\"\n    ))\n    .collect(Collectors.toList());<\/pre>\n\n\n<div id=\"sgb-css-id-126\">\n<h4 class=\"wp-block-heading\" id=\"i-57\">2. filter\u64cd\u4f5c\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\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=\"\">\/\/ \u6761\u4ef6\u306b\u5fdc\u3058\u305f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3068\u5909\u63db\nList&lt;String&gt; filteredResults = items.stream()\n    .filter(item -&gt; item.getValue() != null)\n    .map(item -&gt; item.getValue() &gt; threshold \n        ? \"High Priority\" \n        : \"Low Priority\")\n    .collect(Collectors.toList());\n\n\/\/ \u8907\u6570\u6761\u4ef6\u3067\u306e\u5206\u985e\nMap&lt;String, List&lt;Item&gt;&gt; categorizedItems = items.stream()\n    .collect(Collectors.groupingBy(item -&gt; \n        item.getPrice() &gt; 10000 \n            ? \"\u9ad8\u984d\u5546\u54c1\"\n            : item.getPrice() &gt; 5000 \n                ? \"\u4e2d\u984d\u5546\u54c1\" \n                : \"\u4f4e\u984d\u5546\u54c1\"\n    ));<\/pre>\n\n\n<div id=\"sgb-css-id-127\">\n<h4 class=\"wp-block-heading\" id=\"i-58\">3. reduce\u64cd\u4f5c\u3067\u306e\u6d3b\u7528<\/h4>\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=\"\">\/\/ \u6761\u4ef6\u4ed8\u304d\u96c6\u8a08\nInteger total = numbers.stream()\n    .reduce(0, (sum, num) -&gt; \n        num &gt; 0 ? sum + num : sum);\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u96c6\u8a08\u30ed\u30b8\u30c3\u30af\nString result = words.stream()\n    .reduce(\"\", (acc, word) -&gt; \n        acc.isEmpty() \n            ? word \n            : acc + (word.startsWith(\" \") ? \"\" : \" \") + word);<\/pre>\n\n\n<div id=\"sgb-css-id-128\">\n<h3 class=\"wp-block-heading\" id=\"i-59\">6.2 Optional\u578b\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-129\">\n<h4 class=\"wp-block-heading\" id=\"i-60\">1. Optional\u5024\u306e\u6761\u4ef6\u4ed8\u304d\u5909\u63db<\/h4>\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=\"\">\/\/ Optional\u5024\u306e\u5b89\u5168\u306a\u5909\u63db\npublic String getUserStatus(Optional&lt;User&gt; userOpt) {\n    return userOpt\n        .map(user -&gt; user.isActive() \n            ? \"\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\" \n            : \"\u975e\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\")\n        .orElse(\"\u30e6\u30fc\u30b6\u30fc\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\");\n}\n\n\/\/ \u30cd\u30b9\u30c8\u3055\u308c\u305fOptional\u306e\u51e6\u7406\npublic String getCompanyName(Optional&lt;Employee&gt; employeeOpt) {\n    return employeeOpt\n        .map(Employee::getDepartment)\n        .map(dept -&gt; dept.getCompany() != null \n            ? dept.getCompany().getName() \n            : \"\u6240\u5c5e\u4f01\u696d\u306a\u3057\")\n        .orElse(\"\u5f93\u696d\u54e1\u60c5\u5831\u306a\u3057\");\n}<\/pre>\n\n\n<div id=\"sgb-css-id-130\">\n<h4 class=\"wp-block-heading\" id=\"i-61\">2. \u6761\u4ef6\u4ed8\u304dOptional\u51e6\u7406<\/h4>\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=\"\">\/\/ \u6761\u4ef6\u306b\u5fdc\u3058\u305fOptional\u5024\u306e\u751f\u6210\npublic Optional&lt;String&gt; validateAndGetMessage(String input) {\n    return Optional.ofNullable(input)\n        .filter(str -&gt; !str.isEmpty())\n        .map(str -&gt; str.length() &gt; 10 \n            ? str.substring(0, 10) + \"...\" \n            : str);\n}\n\n\/\/ \u8907\u6570\u6761\u4ef6\u3067\u306eOptional\u51e6\u7406\npublic Optional&lt;User&gt; findUserWithAccess(String userId) {\n    return Optional.ofNullable(userId)\n        .flatMap(userRepository::findById)\n        .filter(User::isActive)\n        .map(user -&gt; user.getAccessLevel() &gt; 5 \n            ? user.withAdminRights() \n            : user.withBasicRights());\n}<\/pre>\n\n\n<div id=\"sgb-css-id-131\">\n<h4 class=\"wp-block-heading\" id=\"i-62\">3. \u5b9f\u8df5\u7684\u306a\u7d44\u307f\u5408\u308f\u305b\u30d1\u30bf\u30fc\u30f3<\/h4>\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=\"\">\/\/ Stream\u3068Optional\u306e\u7d44\u307f\u5408\u308f\u305b\npublic List&lt;String&gt; processUsers(List&lt;User&gt; users) {\n    return users.stream()\n        .map(user -&gt; Optional.ofNullable(user.getEmail())\n            .map(email -&gt; email.contains(\"@\") \n                ? email \n                : email + \"@default.com\")\n            .orElse(\"no-email@default.com\"))\n        .collect(Collectors.toList());\n}\n\n\/\/ \u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u5909\u63db\u51e6\u7406\npublic Map&lt;String, List&lt;TransactionDTO&gt;&gt; categorizeTransactions(\n        List&lt;Transaction&gt; transactions) {\n    return transactions.stream()\n        .map(tx -&gt; new TransactionDTO(\n            tx.getId(),\n            Optional.ofNullable(tx.getAmount())\n                .map(amount -&gt; amount.compareTo(BigDecimal.ZERO) &gt; 0 \n                    ? \"\u5165\u91d1\" \n                    : \"\u51fa\u91d1\")\n                .orElse(\"\u4e0d\u660e\"),\n            tx.getStatus().equals(Status.COMPLETED) \n                ? \"\u5b8c\u4e86\" \n                : \"\u51e6\u7406\u4e2d\"\n        ))\n        .collect(Collectors.groupingBy(\n            dto -&gt; dto.getAmount().compareTo(BigDecimal.ZERO) &gt; 0 \n                ? \"\u5165\u91d1\u53d6\u5f15\" \n                : \"\u51fa\u91d1\u53d6\u5f15\"\n        ));\n}<\/pre>\n\n\n<div id=\"sgb-css-id-132\">\n<h4 class=\"wp-block-heading\" id=\"i-63\">\u30e2\u30c0\u30f3Java\u3067\u306e3\u9805\u6f14\u7b97\u5b50\u6d3b\u7528\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-133\">\n<p class=\"wp-block-paragraph\">\u30001. <strong>\u53ef\u8aad\u6027\u306e\u7dad\u6301<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-134\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30e9\u30e0\u30c0\u5f0f\u5185\u3067\u306f\u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u306b\u9650\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-135\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u8907\u96d1\u306a\u6761\u4ef6\u306f\u30e1\u30bd\u30c3\u30c9\u62bd\u51fa\u3092\u691c\u8a0e<\/p>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u9069\u5207\u306a\u6539\u884c\u3068\u30a4\u30f3\u30c7\u30f3\u30c8\u3092\u4f7f\u7528<\/p>\n\n\n<div id=\"sgb-css-id-136\">\n<p class=\"wp-block-paragraph\">\u30002. <strong><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u914d\u616e<\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"id-d19b669a-0cc9-4ad4-b79a-97bf258c3bdf\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u8003\u616e\u70b9<\/th><th>\u5bfe\u7b56<\/th><\/tr><\/thead><tbody><tr><td>Stream\u51e6\u7406\u306e\u9045\u5ef6\u8a55\u4fa1<\/td><td>\u5fc5\u8981\u306a\u64cd\u4f5c\u306e\u307f\u3092\u5b9f\u884c<\/td><\/tr><tr><td>Optional\u51e6\u7406\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/td><td>\u9069\u5207\u306aAPI\u306e\u9078\u629e<\/td><\/tr><tr><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/td><td>\u4e2d\u9593\u64cd\u4f5c\u306e\u6700\u5c0f\u5316<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n<div id=\"sgb-css-id-137\">\n<p class=\"wp-block-paragraph\">\u30003. <strong><strong><strong>\u30a8\u30e9\u30fc\u51e6\u7406<\/strong><\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-138\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf NullPointerException\u56de\u907f\u306e\u5fb9\u5e95<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u88c5<\/p>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30a8\u30e9\u30fc\u30b1\u30fc\u30b9\u306e\u660e\u78ba\u306a\u51e6\u7406<\/p>\n\n\n<div id=\"sgb-css-id-140\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u5fdc\u7528\u7684\u306a\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30e2\u30c0\u30f3\u306aJava\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u30663\u9805\u6f14\u7b97\u5b50\u3092\u3088\u308a\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<h2 class=\"wp-block-heading\" id=\"i-64\">\u307e\u3068\u3081\uff1a3\u9805\u6f14\u7b97\u5b50\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u306b\u5411\u3051\u3066<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-142\">\n<h4 class=\"wp-block-heading\" id=\"i-65\">\u3053\u306e\u8a18\u4e8b\u306e\u30dd\u30a4\u30f3\u30c8\u6574\u7406<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-143\">\n<p class=\"wp-block-paragraph\">1. <strong>\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-144\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u6761\u4ef6\u5f0f ? \u771f\u306e\u5834\u5408\u306e\u5024\uff1a\u507d\u306e\u5834\u5408\u306e\u5024<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u30921\u884c\u3067\u8868\u73fe\u53ef\u80fd<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u623b\u308a\u5024\u306e\u578b\u306f\u7d71\u4e00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-147\">\n<p class=\"wp-block-paragraph\">2. <strong>\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong><\/p>\n<\/div>\n\n<div id=\"id-8286b1ed-20c0-421c-9fd8-20999fa2d10d\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u30c7\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055<\/td><td>\u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u53ef\u8aad\u6027\u4f4e\u4e0b<\/td><\/tr><tr><td>\u5f0f\u3068\u3057\u3066\u306e\u4f7f\u7528\u304c\u53ef\u80fd<\/td><td>\u30c7\u30d0\u30c3\u30b0\u306e\u96e3\u3057\u3055<\/td><\/tr><tr><td>\u623b\u308a\u5024\u306e\u578b\u5b89\u5168\u6027<\/td><td>\u904e\u5ea6\u306a\u4f7f\u7528\u306b\u3088\u308b\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u4f4e\u4e0b<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n<div id=\"sgb-css-id-148\">\n<p class=\"wp-block-paragraph\">3. <strong><strong>\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762<\/strong><\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-149\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u5358\u7d14\u306a\u6761\u4ef6\u306b\u3088\u308b\u5024\u306e\u9078\u629e<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-150\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf null\u30c1\u30a7\u30c3\u30af\u3068\u65e2\u5b9a\u5024\u306e\u8a2d\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-151\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u6587\u5b57\u5217\u306e\u6761\u4ef6\u4ed8\u304d\u751f\u6210<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-152\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306e\u6761\u4ef6\u5206\u5c90<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-153\">\n<p class=\"wp-block-paragraph\">4. <strong>\u907f\u3051\u308b\u3079\u304d\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-154\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u8907\u96d1\u306a\u30cd\u30b9\u30c8<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-155\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u591a\u91cd\u306e\u6761\u4ef6\u5206\u5c90<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-156\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u526f\u4f5c\u7528\u3092\u542b\u3080\u51e6\u7406<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-157\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u904e\u5ea6\u306b\u9577\u3044\u6761\u4ef6\u5f0f<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-158\">\n<h4 class=\"wp-block-heading\" id=\"i-66\">\u5b9f\u8df5\u306e\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-159\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u6761\u4ef6\u5f0f\u306f\u5358\u7d14\u3067\u7406\u89e3\u3057\u3084\u3059\u3044\u304b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-160\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30cd\u30b9\u30c8\u306f1\u968e\u5c64\u4ee5\u5185\u306b\u53ce\u307e\u3063\u3066\u3044\u308b\u304b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-161\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u623b\u308a\u5024\u306e\u578b\u306f\u9069\u5207\u306b\u7d71\u4e00\u3055\u308c\u3066\u3044\u308b\u304b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-162\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf if-else\u6587\u306e\u65b9\u304c\u9069\u5207\u3067\u306f\u306a\u3044\u304b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-163\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30c1\u30fc\u30e0\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306b\u6e96\u62e0\u3057\u3066\u3044\u308b\u304b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-164\">\n<h4 class=\"wp-block-heading\" id=\"i-67\">\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-165\">\n<p class=\"wp-block-paragraph\">1. <strong>\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306e\u7fd2\u5f97<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-166\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f15\u500b\u306e\u5b9f\u8df5\u4f8b\u3092\u8a66\u3057\u3066\u307f\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-167\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u81ea\u5206\u306e\u30b3\u30fc\u30c9\u3067\u7c21\u5358\u306a\u6761\u4ef6\u5206\u5c90\u30923\u9805\u6f14\u7b97\u5b50\u306b\u66f8\u304d\u63db\u3048\u3066\u307f\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-168\">\n<p class=\"wp-block-paragraph\">2. <strong>\u5fdc\u7528\u7684\u306a\u4f7f\u7528\u6cd5\u306e\u5b9f\u8df5<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-169\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf StreamAPI\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u8a66\u3059<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-170\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf Optional\u578b\u3068\u306e\u9023\u643a\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u88c5\u3057\u3066\u307f\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-171\">\n<p class=\"wp-block-paragraph\">3. <strong>\u30b3\u30fc\u30c9\u306e\u6700\u9069\u5316<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-172\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u65e2\u5b58\u30b3\u30fc\u30c9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u884c\u3046<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-173\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30ec\u30d3\u30e5\u30fc\u3067\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u5f97\u308b<\/p>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-68\">\u6700\u5f8c\u306b<\/h3>\n\n\n<div id=\"sgb-css-id-174\">\n<p class=\"wp-block-paragraph\">3\u9805\u6f14\u7b97\u5b50\u306f\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u300c\u3067\u304d\u308b\u300d\u3053\u3068\u3068\u300c\u3059\u3079\u304d\u300d\u3053\u3068\u306f\u7570\u306a\u308a\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3092\u610f\u8b58\u3057\u306a\u304c\u3089\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u4f7f\u7528\u3092\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306f\u3001\u5171\u901a\u306e\u7406\u89e3\u3068\u4e00\u8cab\u6027\u306e\u3042\u308b\u4f7f\u7528\u65b9\u6cd5\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u5f97\u305f\u77e5\u8b58\u3092\u57fa\u306b\u3001\u30c1\u30fc\u30e0\u5185\u3067\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u7b56\u5b9a\u3084\u6539\u5584\u306b\u3082\u6d3b\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/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; 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