{"id":572,"date":"2024-11-12T11:57:14","date_gmt":"2024-11-12T02:57:14","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=572"},"modified":"2025-03-24T08:53:03","modified_gmt":"2025-03-23T23:53:03","slug":"%e3%80%90java%e5%85%a5%e9%96%80%e3%80%91%e3%82%b3%e3%83%b3%e3%82%b9%e3%83%88%e3%83%a9%e3%82%af%e3%82%bf%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%81","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=572","title":{"rendered":"\u3010Java\u5165\u9580\u3011\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4f7f\u3044\u65b9\u5b8c\u5168\u30ac\u30a4\u30c9\uff01\u5b9f\u8df5\u4f8b\u3067\u5b66\u30767\u3064\u306e\u91cd\u8981\u30dd\u30a4\u30f3\u30c8"},"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\uff0e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u306f\uff1f\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-2\">1.1 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f79\u5272<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">1.2 \u306a\u305c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u5fc5\u8981\u306a\u306e\u304b\uff1f\u5177\u4f53\u4f8b\u3067\u7406\u89e3\u3059\u308b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">\uff12\uff0eJava\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u57fa\u672c\u6587\u6cd5\u3068\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">2.1 \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u306f\u4f55\u304b<\/a>      <\/li>      <li>        <a href=\"#i-9\">2.2 \u5f15\u6570\u3042\u308a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-10\">2.3 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">\uff13\uff0e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5b9f\u88c5\u306e7\u3064\u306e\u91cd\u8981\u30dd\u30a4\u30f3\u30c8<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">3.1 \u521d\u671f\u5316\u51e6\u7406\u306f\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/a>      <\/li>      <li>        <a href=\"#i-13\">3.2 this\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-14\">3.3 \u7d99\u627f\u6642\u306esuper()\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-15\">3.4 \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-16\">3.5 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9023\u9396\u3092\u907f\u3051\u308b\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-17\">3.6 \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u306eprivate\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u6d3b\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">3.7 \u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-19\">\uff14\uff0e\u3088\u304f\u3042\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u30df\u30b9\u3068\u5bfe\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">4.1 \u5faa\u74b0\u53c2\u7167\u3092\u907f\u3051\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-21\">4.2 \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u521d\u671f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">4.3 \u975enull\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4fdd\u8a3c\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-23\">\uff15\uff0e\u5b9f\u8df5\u7684\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u6d3b\u7528\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-24\">5.1 \u30c7\u30fc\u30bf\u8ee2\u9001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08DTO\uff09\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-25\">5.2 \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-26\">5.3 \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u9ad8\u3081\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u8a2d\u8a08<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-27\">\u307e\u3068\u3081\uff1a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5b9f\u88c5\u306e\u6210\u529f\u306b\u5411\u3051\u3066<\/a>  <\/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>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9069\u5207\u306a\u4f7f\u7528\u306f\u826f\u8cea\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u4e0a\u3067\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u300c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3063\u3066\u7d50\u5c40\u4f55\u306e\u305f\u3081\u306b\u3042\u308b\u306e\uff1f\u300d\u300c\u3069\u3093\u306a\u6642\u306b\u3069\u3046\u4f7f\u3048\u3070\u3044\u3044\u306e\uff1f\u300d\u3068\u3044\u3046\u7591\u554f\u3092\u6301\u3064\u958b\u767a\u8005\u306f\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Java\u521d\u5b66\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u3092\u5bfe\u8c61\u306b\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u57fa\u672c\u304b\u3089\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u307e\u3067\u3001\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u4ea4\u3048\u306a\u304c\u3089\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\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-4\">\n<li>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u57fa\u672c\u6982\u5ff5\u3068\u91cd\u8981\u6027<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-5\">\n<li>\u69d8\u3005\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-6\">\n<li>\u5b9f\u52d9\u3067\u4f7f\u3048\u308b7\u3064\u306e\u91cd\u8981\u306a\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<li>\u3088\u304f\u3042\u308b\u5b9f\u88c5\u30df\u30b9\u3068\u305d\u306e\u5bfe\u7b56<\/li>\n<\/div>\n\n\n<li>\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u4f8b\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\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\">\u524d\u63d0\u77e5\u8b58<\/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-9\">\n<li>Java\u306e\u57fa\u672c\u7684\u306a\u6587\u6cd5<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<li>\u30af\u30e9\u30b9\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6982\u5ff5<\/li>\n<\/div>\n\n\n<li>\u57fa\u672c\u7684\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u6982\u5ff5<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-12\">\n<p>\u305d\u308c\u3067\u306f\u3001Java\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u3064\u3044\u3066\u3001\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u307e\u3067\u3001\u9806\u3092\u8ffd\u3063\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<h2 class=\"wp-block-heading\" id=\"i-1\">\uff11\uff0e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u306f\uff1f\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-14\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">1.1 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f79\u5272<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-15\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001Java\u306b\u304a\u3051\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u91cd\u8981\u306a\u8981\u7d20\u306e1\u3064\u3067\u3059\u3002\u7c21\u5358\u306b\u8a00\u3048\u3070\u3001<strong>\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u969b\u306b\u81ea\u52d5\u7684\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u7279\u5225\u306a\u30e1\u30bd\u30c3\u30c9<\/strong>\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-16\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4e3b\u306a\u5f79\u5272\u306f\u4ee5\u4e0b\u306e3\u3064\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4e3b\u306a\u5f79\u5272<\/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-17\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30e2\u30ea\u9818\u57df\u306e\u78ba\u4fdd<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u521d\u671f\u5316<\/li>\n<\/div>\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\u6642\u306e\u5fc5\u8981\u306a\u51e6\u7406\u306e\u5b9f\u884c<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-19\">\n<p>\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u4f8b\u3092\u793a\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=\"\">public class Student {\n    \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\n    private String name;\n    private int age;\n\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Student(String name, int age) {\n        \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u521d\u671f\u5316\n        this.name = name;\n        this.age = age;\n    }\n}\n\n\/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\nStudent student = new Student(\"\u7530\u4e2d\", 20);<\/pre>\n\n\n<div id=\"sgb-css-id-20\">\n<h3 class=\"wp-block-heading\" id=\"i-3\">1.2 \u306a\u305c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u5fc5\u8981\u306a\u306e\u304b\uff1f\u5177\u4f53\u4f8b\u3067\u7406\u89e3\u3059\u308b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-21\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u5fc5\u8981\u306a\u7406\u7531\u3092\u3001\u5b9f\u969b\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-22\">\n<h4 class=\"wp-block-heading\" id=\"i-4\">1. \u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u8a3c\u3059\u308b<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\u6642\u306b\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u3092\u5f37\u5236\u7684\u306b\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class BankAccount {\n    private String accountNumber;\n    private double balance;\n\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u53e3\u5ea7\u756a\u53f7\u3092\u5fc5\u9808\u306b\u3059\u308b\n    public BankAccount(String accountNumber) {\n        this.accountNumber = accountNumber;\n        this.balance = 0.0;  \/\/ \u521d\u671f\u6b8b\u9ad8\u306f0\u5186\n    }\n\n    \/\/ \u53e3\u5ea7\u756a\u53f7\u306a\u3057\u3067\u306f\u4f5c\u6210\u3067\u304d\u306a\u3044\n    \/\/ BankAccount account = new BankAccount(); \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\n}<\/pre>\n\n\n<div id=\"sgb-css-id-24\">\n<h4 class=\"wp-block-heading\" id=\"i-5\">2. \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6b63\u3057\u3044\u521d\u671f\u72b6\u614b\u3092\u4fdd\u8a3c\u3059\u308b<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-25\">\n<p>\u4f8b\u3048\u3070\u3001\u30b2\u30fc\u30e0\u306e\u30ad\u30e3\u30e9\u30af\u30bf\u30fc\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class GameCharacter {\n    private String name;\n    private int health;\n    private int level;\n\n    \/\/ \u30ad\u30e3\u30e9\u30af\u30bf\u30fc\u4f5c\u6210\u6642\u306e\u521d\u671f\u72b6\u614b\u3092\u4fdd\u8a3c\n    public GameCharacter(String name) {\n        this.name = name;\n        this.health = 100;  \/\/ \u521d\u671fHP\n        this.level = 1;     \/\/ \u521d\u671f\u30ec\u30d9\u30eb\n    }\n}\n\n\/\/ \u65b0\u3057\u3044\u30ad\u30e3\u30e9\u30af\u30bf\u30fc\u306f\u5fc5\u305a\u521d\u671f\u72b6\u614b\u304b\u3089\u59cb\u307e\u308b\nGameCharacter hero = new GameCharacter(\"\u52c7\u8005\");<\/pre>\n\n\n<div id=\"sgb-css-id-26\">\n<h4 class=\"wp-block-heading\" id=\"i-6\">3. \u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u5316\u3092\u7c21\u7565\u5316\u3059\u308b<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u3088\u3046\u306a\u8907\u96d1\u306a\u521d\u671f\u5316\u51e6\u7406\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class DatabaseConnection {\n    private Connection connection;\n    private String url;\n    private String username;\n\n    public DatabaseConnection(String url, String username, String password) {\n        this.url = url;\n        this.username = username;\n        try {\n            \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u521d\u671f\u5316\n            this.connection = DriverManager.getConnection(url, username, password);\n        } catch (SQLException e) {\n            throw new RuntimeException(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", e);\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-28\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\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\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306e\u30e1\u30ea\u30c3\u30c8<\/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-29\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u3068\u521d\u671f\u5316\u30921\u56de\u3067\u884c\u3048\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-30\">\n<li>\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u306e\u6b20\u843d\u3092\u9632\u3052\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<li>\u521d\u671f\u5316\u51e6\u7406\u3092\u96c6\u4e2d\u7ba1\u7406\u3067\u304d\u308b<\/li>\n<\/div>\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3059\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-33\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u5b89\u5168\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u91cd\u8981\u306a\u6a5f\u80fd\u306a\u306e\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<h2 class=\"wp-block-heading\" id=\"i-7\">\uff12\uff0eJava\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u57fa\u672c\u6587\u6cd5\u3068\u4f7f\u3044\u65b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-35\">\n<h3 class=\"wp-block-heading\" id=\"i-8\">2.1 \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u306f\u4f55\u304b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u30af\u30e9\u30b9\u306b\u660e\u793a\u7684\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306bJava\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u81ea\u52d5\u7684\u306b\u63d0\u4f9b\u3059\u308b\u5f15\u6570\u306a\u3057\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class SimpleClass {\n    private int value;\n\n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u4ee5\u4e0b\u3068\u540c\u7b49\n    \/\/ public SimpleClass() {\n    \/\/     \/\/ \u4f55\u3082\u51e6\u7406\u3092\u884c\u308f\u306a\u3044\n    \/\/ }\n}\n\n\/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\nSimpleClass obj = new SimpleClass();<\/pre>\n\n\n<div id=\"sgb-css-id-37\">\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u7279\u5fb4\uff1a<\/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\">\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u7279\u5fb4<\/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-38\">\n<li>\u5f15\u6570\u3092\u6301\u305f\u306a\u3044<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-39\">\n<li>\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306f\u30af\u30e9\u30b9\u3068\u540c\u3058<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-40\">\n<li>\u3059\u3079\u3066\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u521d\u671f\u5024\u3067\u521d\u671f\u5316<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<li>\u6570\u5024\u578b\uff1a 0<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-42\">\n<li>boolean\u578b\uff1a false<\/li>\n<\/div>\n\n\n<li>\u53c2\u7167\u578b\uff1a null<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-43\">\n<h3 class=\"wp-block-heading\" id=\"i-9\">2.2 \u5f15\u6570\u3042\u308a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-44\">\n<p>\u5f15\u6570\u3042\u308a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\u6642\u306b\u521d\u671f\u5024\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Person {\n    private String name;\n    private int age;\n\n    \/\/ \u5f15\u6570\u3042\u308a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Person(String name, int age) {\n        \/\/ \u5f15\u6570\u306e\u5024\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u521d\u671f\u5316\n        this.name = name;  \/\/ this\u3092\u4f7f\u7528\u3057\u3066\u540d\u524d\u306e\u885d\u7a81\u3092\u56de\u907f\n        this.age = age;    \/\/ this\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u81ea\u8eab\u3092\u6307\u3059\n    }\n\n    \/\/ \u5f15\u6570\u306e\u4e00\u90e8\u3092\u7701\u7565\u3057\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Person(String name) {\n        this.name = name;\n        this.age = 0;  \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nPerson person1 = new Person(\"\u5c71\u7530\", 25);\nPerson person2 = new Person(\"\u9234\u6728\");  \/\/ age\u306f0\u3067\u521d\u671f\u5316\u3055\u308c\u308b<\/pre>\n\n\n<div id=\"sgb-css-id-45\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">2.3 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u306f\u3001\u540c\u3058\u30af\u30e9\u30b9\u5185\u306b\u8907\u6570\u306e\u7570\u306a\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u65b9\u6cd5\u3092\u67d4\u8edf\u306b\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Product {\n    private String name;\n    private double price;\n    private String category;\n    private boolean isAvailable;\n\n    \/\/ \u57fa\u672c\u3068\u306a\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Product(String name, double price, String category, boolean isAvailable) {\n        this.name = name;\n        this.price = price;\n        this.category = category;\n        this.isAvailable = isAvailable;\n    }\n\n    \/\/ \u5728\u5eab\u3042\u308a\u3067\u5546\u54c1\u3092\u4f5c\u6210\u3059\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Product(String name, double price, String category) {\n        \/\/ this()\u3092\u4f7f\u7528\u3057\u3066\u4ed6\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\n        this(name, price, category, true);\n    }\n\n    \/\/ \u30ab\u30c6\u30b4\u30ea\u306a\u3057\u3067\u5546\u54c1\u3092\u4f5c\u6210\u3059\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Product(String name, double price) {\n        this(name, price, \"\u672a\u5206\u985e\", true);\n    }\n\n    \/\/ \u540d\u524d\u306e\u307f\u3067\u5546\u54c1\u3092\u4f5c\u6210\u3059\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Product(String name) {\n        this(name, 0.0);\n    }\n}\n\n\/\/ \u69d8\u3005\u306a\u65b9\u6cd5\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\nProduct p1 = new Product(\"\u30ce\u30fc\u30c8PC\", 80000, \"\u96fb\u5316\u88fd\u54c1\", true);\nProduct p2 = new Product(\"\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\", 50000, \"\u96fb\u5316\u88fd\u54c1\");\nProduct p3 = new Product(\"\u6587\u623f\u5177\", 100);\nProduct p4 = new Product(\"\u30b5\u30f3\u30d7\u30eb\u5546\u54c1\");<\/pre>\n\n\n<div id=\"sgb-css-id-47\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306e\u5b9f\u88c5\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-48\">\n<p><strong>1. this()\u306e\u4f7f\u7528<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-49\">\n<p>\u3000\u25cf \u4ed6\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\u969b\u306fthis()\u3092\u4f7f\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-50\">\n<p>\u3000\u25cf this()\u306f\u5fc5\u305a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u6700\u521d\u306e\u6587\u3068\u3057\u3066\u8a18\u8ff0<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   public Product(String name, double price) {\n       this(name, price, \"\u672a\u5206\u985e\", true);  \/\/ OK\n       \/\/ this(name, price, \"\u672a\u5206\u985e\", true);  \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff082\u884c\u76ee\u4ee5\u964d\u3067\u306f\u4f7f\u7528\u4e0d\u53ef\uff09\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-51\">\n<p><strong>2. \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u9069\u5207\u306a\u8a2d\u5b9a<\/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=\"\">   public class User {\n       private String name;\n       private String role;\n\n       public User(String name) {\n           this(name, \"USER\");  \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30ed\u30fc\u30eb\u3092\u8a2d\u5b9a\n       }\n\n       public User(String name, String role) {\n           this.name = name;\n           this.role = role;\n       }\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-52\">\n<p><strong>3. \u5f15\u6570\u306e\u578b\u306b\u3088\u308b\u533a\u5225<\/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=\"\">   public class Number {\n       private int value;\n\n       public Number(int value) {\n           this.value = value;\n       }\n\n       public Number(String value) {\n           this.value = Integer.parseInt(value);  \/\/ \u6587\u5b57\u5217\u3092\u6570\u5024\u306b\u5909\u63db\n       }\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-53\">\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u6587\u6cd5\u3068\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30af\u30e9\u30b9\u8a2d\u8a08\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<h2 class=\"wp-block-heading\" id=\"i-11\">\uff13\uff0e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5b9f\u88c5\u306e7\u3064\u306e\u91cd\u8981\u30dd\u30a4\u30f3\u30c8<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">3.1 \u521d\u671f\u5316\u51e6\u7406\u306f\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-56\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067\u306e\u521d\u671f\u5316\u51e6\u7406\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u6642\u9593\u306b\u76f4\u63a5\u5f71\u97ff\u3059\u308b\u305f\u3081\u3001\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u91cd\u8981\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=\"\">\/\/ \u826f\u3044\u4f8b\npublic class Customer {\n    private String name;\n    private List&lt;Order&gt; orders;\n\n    public Customer(String name) {\n        this.name = name;\n        this.orders = new ArrayList&lt;&gt;();  \/\/ \u5fc5\u8981\u6700\u5c0f\u9650\u306e\u521d\u671f\u5316\n    }\n}\n\n\/\/ \u907f\u3051\u308b\u3079\u304d\u4f8b\npublic class Customer {\n    private String name;\n    private List&lt;Order&gt; orders;\n    private Map&lt;String, Order&gt; orderMap;\n\n    public Customer(String name) {\n        this.name = name;\n        this.orders = new ArrayList&lt;&gt;();\n        this.orderMap = new HashMap&lt;&gt;();  \/\/ \u4e0d\u8981\u306a\u521d\u671f\u5316\n        loadHistoricalOrders();           \/\/ \u91cd\u3044\u51e6\u7406\u306f\u907f\u3051\u308b\n    }\n\n    private void loadHistoricalOrders() {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u8aad\u307f\u8fbc\u307f\u306a\u3069\u91cd\u3044\u51e6\u7406\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-57\">\n<h3 class=\"wp-block-heading\" id=\"i-13\">3.2 this\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-58\">\n<p>this\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u540d\u524d\u306e\u885d\u7a81\u3092\u89e3\u6c7a\u3057\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Employee {\n    private String name;\n    private double salary;\n\n    \/\/ this\u3092\u4f7f\u7528\u3057\u3066\u660e\u78ba\u306b\u533a\u5225\n    public Employee(String name, double salary) {\n        this.name = name;\n        this.salary = salary;\n    }\n\n    \/\/ \u7570\u306a\u308b\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\uff08\u3042\u307e\u308a\u63a8\u5968\u3055\u308c\u306a\u3044\uff09\n    public Employee(String employeeName, double employeeSalary) {\n        name = employeeName;\n        salary = employeeSalary;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-59\">\n<h3 class=\"wp-block-heading\" id=\"i-14\">3.3 \u7d99\u627f\u6642\u306esuper()\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-60\">\n<p>\u5b50\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306f\u3001\u5fc5\u305a\u89aa\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Animal {\n    protected String name;\n    protected int age;\n\n    public Animal(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n}\n\npublic class Dog extends Animal {\n    private String breed;\n\n    \/\/ \u6b63\u3057\u3044\u5b9f\u88c5\n    public Dog(String name, int age, String breed) {\n        super(name, age);  \/\/ \u89aa\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3057\n        this.breed = breed;\n    }\n\n    \/\/ \u907f\u3051\u308b\u3079\u304d\u5b9f\u88c5\n    public Dog(String name, int age, String breed) {\n        \/\/ super()\u306e\u547c\u3073\u51fa\u3057\u304c\u306a\u3044\n        this.name = name;  \/\/ \u76f4\u63a5\u89aa\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a2\u30af\u30bb\u30b9\n        this.age = age;\n        this.breed = breed;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-61\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">3.4 \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<p>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff08\u4e0d\u5909\uff09\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306f\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u5b8c\u5168\u306a\u521d\u671f\u5316\u3092\u884c\u3044\u3001setter method\u3092\u63d0\u4f9b\u3057\u306a\u3044\u3088\u3046\u306b\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=\"\">public final class ImmutablePerson {\n    private final String name;\n    private final LocalDate birthDate;\n    private final List&lt;String&gt; hobbies;\n\n    public ImmutablePerson(String name, LocalDate birthDate, List&lt;String&gt; hobbies) {\n        this.name = name;\n        this.birthDate = birthDate;\n        \/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u9632\u5fa1\u7684\u30b3\u30d4\u30fc\n        this.hobbies = new ArrayList&lt;&gt;(hobbies);\n    }\n\n    \/\/ getter\u306e\u307f\u3092\u63d0\u4f9b\n    public String getName() {\n        return name;\n    }\n\n    public LocalDate getBirthDate() {\n        return birthDate;\n    }\n\n    public List&lt;String&gt; getHobbies() {\n        \/\/ \u5909\u66f4\u4e0d\u53ef\u306a\u30ea\u30b9\u30c8\u3092\u8fd4\u3059\n        return Collections.unmodifiableList(hobbies);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-63\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">3.5 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9023\u9396\u3092\u907f\u3051\u308b\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9023\u9396\uff08\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fb\u30c1\u30a7\u30a4\u30cb\u30f3\u30b0\uff09\u306f\u3001\u30b3\u30fc\u30c9\u306e\u8907\u96d1\u6027\u3092\u5897\u52a0\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u9069\u5207\u306b\u7ba1\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Configuration {\n    private String host;\n    private int port;\n    private String username;\n    private String password;\n\n    \/\/ \u57fa\u672c\u3068\u306a\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Configuration(String host, int port, String username, String password) {\n        this.host = host;\n        this.port = port;\n        this.username = username;\n        this.password = password;\n    }\n\n    \/\/ \u4ed6\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u57fa\u672c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\n    public Configuration(String host, int port) {\n        this(host, port, \"admin\", \"default\");\n    }\n\n    \/\/ \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u65b9\u304c\u671b\u307e\u3057\u3044\n    public static class Builder {\n        private String host;\n        private int port;\n        private String username = \"admin\";\n        private String password = \"default\";\n\n        public Builder(String host, int port) {\n            this.host = host;\n            this.port = port;\n        }\n\n        public Builder username(String username) {\n            this.username = username;\n            return this;\n        }\n\n        public Builder password(String password) {\n            this.password = password;\n            return this;\n        }\n\n        public Configuration build() {\n            return new Configuration(host, port, username, password);\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-65\">\n<h3 class=\"wp-block-heading\" id=\"i-17\">3.6 \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u306eprivate\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u6d3b\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-66\">\n<p>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306f\u3001private\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210\u3092\u5236\u5fa1\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=\"\">public class DatabaseConnection {\n    private static DatabaseConnection instance;\n    private Connection connection;\n\n    \/\/ private\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    private DatabaseConnection() {\n        \/\/ \u521d\u671f\u5316\u51e6\u7406\n    }\n\n    \/\/ \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\n    public static synchronized DatabaseConnection getInstance() {\n        if (instance == null) {\n            instance = new DatabaseConnection();\n        }\n        return instance;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-67\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">3.7 \u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-68\">\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5b8c\u5168\u306a\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\u3059\u308b\u969b\u306f\u3001\u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u5b9f\u88c5\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=\"\">public class Document {\n    private String title;\n    private List&lt;String&gt; tags;\n    private Map&lt;String, String&gt; metadata;\n\n    \/\/ \u901a\u5e38\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Document(String title) {\n        this.title = title;\n        this.tags = new ArrayList&lt;&gt;();\n        this.metadata = new HashMap&lt;&gt;();\n    }\n\n    \/\/ \u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Document(Document other) {\n        \/\/ \u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3084\u4e0d\u5909\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u76f4\u63a5\u30b3\u30d4\u30fc\n        this.title = other.title;\n\n        \/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306f\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\n        this.tags = new ArrayList&lt;&gt;(other.tags);\n        this.metadata = new HashMap&lt;&gt;(other.metadata);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-69\">\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u30dd\u30a4\u30f3\u30c8\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\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-70\">\n<h2 class=\"wp-block-heading\" id=\"i-19\">\uff14\uff0e\u3088\u304f\u3042\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u30df\u30b9\u3068\u5bfe\u7b56<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-71\">\n<h3 class=\"wp-block-heading\" id=\"i-20\">4.1 \u5faa\u74b0\u53c2\u7167\u3092\u907f\u3051\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<p>\u5faa\u74b0\u53c2\u7167\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u9593\u306e\u76f8\u4e92\u4f9d\u5b58\u95a2\u4fc2\u306b\u3088\u3063\u3066\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3084\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5371\u967a\u306a\u5b9f\u88c5\u4f8b\npublic class Parent {\n    private Child child;\n\n    public Parent() {\n        \/\/ \u5faa\u74b0\u53c2\u7167\u304c\u767a\u751f\n        this.child = new Child(this);\n    }\n}\n\npublic class Child {\n    private Parent parent;\n\n    public Child(Parent parent) {\n        this.parent = parent;\n    }\n}\n\n\/\/ \u6539\u5584\u3055\u308c\u305f\u5b9f\u88c5\u4f8b\npublic class Parent {\n    private Child child;\n\n    public Parent() {\n        \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306f\u95a2\u9023\u4ed8\u3051\u3092\u884c\u308f\u306a\u3044\n    }\n\n    public void setChild(Child child) {\n        this.child = child;\n    }\n}\n\npublic class Child {\n    private Parent parent;\n\n    public Child() {\n        \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306f\u95a2\u9023\u4ed8\u3051\u3092\u884c\u308f\u306a\u3044\n    }\n\n    public void setParent(Parent parent) {\n        this.parent = parent;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nParent parent = new Parent();\nChild child = new Child();\nparent.setChild(child);\nchild.setParent(parent);<\/pre>\n\n\n<div id=\"sgb-css-id-73\">\n<h3 class=\"wp-block-heading\" id=\"i-21\">4.2 \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u521d\u671f\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092\u9069\u5207\u306b\u884c\u3044\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u3053\u3068\u304c\u91cd\u8981\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=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u5b9f\u88c5\npublic class ResourceManager {\n    private List&lt;byte[]&gt; resources;\n    private FileInputStream fileStream;\n\n    public ResourceManager() {\n        resources = new ArrayList&lt;&gt;();\n        try {\n            \/\/ \u30ea\u30bd\u30fc\u30b9\u304c\u9069\u5207\u306b\u89e3\u653e\u3055\u308c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\n            fileStream = new FileInputStream(\"data.txt\");\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n\n\/\/ \u6539\u5584\u3055\u308c\u305f\u5b9f\u88c5\npublic class ResourceManager implements AutoCloseable {\n    private List&lt;byte[]&gt; resources;\n    private FileInputStream fileStream;\n\n    public ResourceManager() throws IOException {\n        this.resources = new ArrayList&lt;&gt;();\n    }\n\n    \/\/ \u5fc5\u8981\u306a\u3068\u304d\u306b\u30ea\u30bd\u30fc\u30b9\u3092\u521d\u671f\u5316\n    public void initializeStream() throws IOException {\n        if (fileStream != null) {\n            fileStream.close();\n        }\n        fileStream = new FileInputStream(\"data.txt\");\n    }\n\n    @Override\n    public void close() throws IOException {\n        if (fileStream != null) {\n            fileStream.close();\n        }\n        resources.clear();\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry (ResourceManager manager = new ResourceManager()) {\n    manager.initializeStream();\n    \/\/ \u30ea\u30bd\u30fc\u30b9\u306e\u4f7f\u7528\n} catch (IOException e) {\n    \/\/ \u30a8\u30e9\u30fc\u51e6\u7406\n}<\/pre>\n\n\n<div id=\"sgb-css-id-75\">\n<h3 class=\"wp-block-heading\" id=\"i-22\">4.3 \u975enull\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4fdd\u8a3c\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-76\">\n<p>\u5fc5\u9808\u30d5\u30a3\u30fc\u30eb\u30c9\u306enull\u5b89\u5168\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u305f\u3081\u306b\u3001\u9069\u5207\u306a\u691c\u8a3c\u3092\u5b9f\u88c5\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=\"\">public class User {\n    private final String username;\n    private final String email;\n    private String nickname;  \/\/ \u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\n\n    \/\/ \u826f\u3044\u5b9f\u88c5\u4f8b\n    public User(String username, String email) {\n        \/\/ \u5fc5\u9808\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u691c\u8a3c\n        if (username == null || username.trim().isEmpty()) {\n            throw new IllegalArgumentException(\"\u30e6\u30fc\u30b6\u30fc\u540d\u306f\u5fc5\u9808\u3067\u3059\");\n        }\n        if (email == null || !email.contains(\"@\")) {\n            throw new IllegalArgumentException(\"\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\");\n        }\n\n        this.username = username.trim();\n        this.email = email.trim();\n    }\n\n    \/\/ \u3088\u308a\u30ed\u30d0\u30b9\u30c8\u306a\u5b9f\u88c5\u4f8b\n    public static class Builder {\n        private String username;\n        private String email;\n        private String nickname;\n\n        public Builder username(String username) {\n            this.username = username;\n            return this;\n        }\n\n        public Builder email(String email) {\n            this.email = email;\n            return this;\n        }\n\n        public Builder nickname(String nickname) {\n            this.nickname = nickname;\n            return this;\n        }\n\n        public User build() {\n            \/\/ \u4e00\u62ec\u3067\u691c\u8a3c\u3092\u884c\u3046\n            List&lt;String&gt; errors = new ArrayList&lt;&gt;();\n\n            if (username == null || username.trim().isEmpty()) {\n                errors.add(\"\u30e6\u30fc\u30b6\u30fc\u540d\u306f\u5fc5\u9808\u3067\u3059\");\n            }\n            if (email == null || !email.contains(\"@\")) {\n                errors.add(\"\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\");\n            }\n\n            if (!errors.isEmpty()) {\n                throw new IllegalArgumentException(String.join(\", \", errors));\n            }\n\n            return new User(this);\n        }\n    }\n\n    \/\/ Builder\u304b\u3089\u306e\u307f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u53ef\u80fd\n    private User(Builder builder) {\n        this.username = builder.username.trim();\n        this.email = builder.email.trim();\n        this.nickname = builder.nickname != null ? builder.nickname.trim() : null;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n    User user = new User.Builder()\n        .username(\"john_doe\")\n        .email(\"john@example.com\")\n        .nickname(\"John\")\n        .build();\n} catch (IllegalArgumentException e) {\n    \/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n}<\/pre>\n\n\n<div id=\"sgb-css-id-77\">\n<p>\u3053\u308c\u3089\u306e\u5bfe\u7b56\u306e\u30dd\u30a4\u30f3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\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\">\u5bfe\u7b56\u306e\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\"><div id=\"sgb-css-id-78\">\n<p><strong>1. \u65e9\u671f\u691c\u8a3c<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-79\">\n<p>\u3000\u25cf \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5148\u982d\u3067\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u691c\u8a3c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-80\">\n<p>\u3000\u25cf null\u30c1\u30a7\u30c3\u30af\u3084\u57fa\u672c\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u65bd<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-81\">\n<p>\u3000\u25cf \u554f\u984c\u304c\u3042\u308b\u5834\u5408\u306f\u4f8b\u5916\u3092\u30b9\u30ed\u30fc<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-82\">\n<p><strong>2. \u30ea\u30bd\u30fc\u30b9\u7ba1\u7406<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-83\">\n<p>\u3000\u25cf AutoCloseable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\n<p>\u3000\u25cf try-with-resources\u306e\u6d3b\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-85\">\n<p>\u3000\u25cf \u9069\u5207\u306a\u30ea\u30bd\u30fc\u30b9\u89e3\u653e\u306e\u4fdd\u8a3c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<p><strong>3. \u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-87\">\n<p>\u3000\u25cf \u4e0d\u5909\u6761\u4ef6\u306e\u4fdd\u8a3c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-88\">\n<p>\u3000\u25cf \u5165\u529b\u5024\u306e\u6b63\u898f\u5316\uff08trim()\u306a\u3069\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\n<p>\u3000\u25cf \u660e\u78ba\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u63d0\u4f9b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-90\">\n<p><strong>4. \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-91\">\n<p>\u3000\u25cf \u8907\u96d1\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u4e00\u62ec\u5b9f\u884c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<p>\u3000\u25cf \u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u67d4\u8edf\u306a\u8a2d\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\n<p>\u3000\u25cf \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u96c6\u7d04<\/p>\n<\/div><\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<p>\u3053\u308c\u3089\u306e\u5bfe\u7b56\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<h2 class=\"wp-block-heading\" id=\"i-23\">\uff15\uff0e\u5b9f\u8df5\u7684\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u6d3b\u7528\u4f8b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<h3 class=\"wp-block-heading\" id=\"i-24\">5.1 \u30c7\u30fc\u30bf\u8ee2\u9001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08DTO\uff09\u306e\u5b9f\u88c5\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<p>DTO\u306f\u3001\u30ec\u30a4\u30e4\u30fc\u9593\u3067\u30c7\u30fc\u30bf\u3092\u8ee2\u9001\u3059\u308b\u969b\u306b\u4f7f\u7528\u3055\u308c\u308b\u5358\u7d14\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\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=\"\">\/\/ \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u30af\u30e9\u30b9\npublic class UserEntity {\n    private Long id;\n    private String username;\n    private String email;\n    private String password;\n    private LocalDateTime createdAt;\n    private LocalDateTime updatedAt;\n\n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30de\u30c3\u30d4\u30f3\u30b0\u7528\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public UserEntity() {}\n\n    \/\/ \u696d\u52d9\u30ed\u30b8\u30c3\u30af\u7528\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public UserEntity(String username, String email, String password) {\n        this.username = username;\n        this.email = email;\n        this.password = password;\n        this.createdAt = LocalDateTime.now();\n        this.updatedAt = LocalDateTime.now();\n    }\n}\n\n\/\/ DTO\u30af\u30e9\u30b9\npublic class UserDTO {\n    private final String username;\n    private final String email;\n    private final LocalDateTime lastLogin;\n\n    \/\/ \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304b\u3089DTO\u3092\u4f5c\u6210\u3059\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public UserDTO(UserEntity entity) {\n        this.username = entity.getUsername();\n        this.email = entity.getEmail();\n        this.lastLogin = entity.getUpdatedAt();\n    }\n\n    \/\/ JSON\u304b\u3089DTO\u3092\u4f5c\u6210\u3059\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public UserDTO(JsonObject json) {\n        this.username = json.getString(\"username\");\n        this.email = json.getString(\"email\");\n        this.lastLogin = LocalDateTime.parse(json.getString(\"lastLogin\"));\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-99\">\n<h3 class=\"wp-block-heading\" id=\"i-25\">5.2 \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-100\">\n<p>\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u69cb\u7bc9\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u3068\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u7d44\u307f\u5408\u308f\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ApiRequest {\n    private final String endpoint;\n    private final String method;\n    private final Map&lt;String, String&gt; headers;\n    private final Map&lt;String, String&gt; queryParams;\n    private final String body;\n    private final int timeout;\n\n    \/\/ \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    private ApiRequest(Builder builder) {\n        this.endpoint = builder.endpoint;\n        this.method = builder.method;\n        this.headers = Collections.unmodifiableMap(new HashMap&lt;&gt;(builder.headers));\n        this.queryParams = Collections.unmodifiableMap(new HashMap&lt;&gt;(builder.queryParams));\n        this.body = builder.body;\n        this.timeout = builder.timeout;\n    }\n\n    public static class Builder {\n        \/\/ \u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\n        private final String endpoint;\n        private final String method;\n\n        \/\/ \u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf\n        private Map&lt;String, String&gt; headers = new HashMap&lt;&gt;();\n        private Map&lt;String, String&gt; queryParams = new HashMap&lt;&gt;();\n        private String body;\n        private int timeout = 30000;  \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n\n        public Builder(String endpoint, String method) {\n            this.endpoint = endpoint;\n            this.method = method;\n        }\n\n        public Builder addHeader(String key, String value) {\n            headers.put(key, value);\n            return this;\n        }\n\n        public Builder addQueryParam(String key, String value) {\n            queryParams.put(key, value);\n            return this;\n        }\n\n        public Builder body(String body) {\n            this.body = body;\n            return this;\n        }\n\n        public Builder timeout(int timeout) {\n            this.timeout = timeout;\n            return this;\n        }\n\n        public ApiRequest build() {\n            return new ApiRequest(this);\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nApiRequest request = new ApiRequest.Builder(\"https:\/\/api.example.com\/users\", \"POST\")\n    .addHeader(\"Content-Type\", \"application\/json\")\n    .addHeader(\"Authorization\", \"Bearer token123\")\n    .addQueryParam(\"version\", \"v2\")\n    .body(\"{\\\"name\\\":\\\"John\\\"}\")\n    .timeout(5000)\n    .build();<\/pre>\n\n\n<div id=\"sgb-css-id-101\">\n<h3 class=\"wp-block-heading\" id=\"i-26\">5.3 \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u9ad8\u3081\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u8a2d\u8a08<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<p>\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306b\u3001\u9069\u5207\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u8a2d\u8a08\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class OrderProcessor {\n    private final PaymentGateway paymentGateway;\n    private final OrderRepository orderRepository;\n    private final NotificationService notificationService;\n\n    \/\/ \u672c\u756a\u74b0\u5883\u7528\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public OrderProcessor() {\n        this(\n            new DefaultPaymentGateway(),\n            new DatabaseOrderRepository(),\n            new EmailNotificationService()\n        );\n    }\n\n    \/\/ \u30c6\u30b9\u30c8\u7528\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\uff08\u4f9d\u5b58\u6027\u6ce8\u5165\uff09\n    public OrderProcessor(\n        PaymentGateway paymentGateway,\n        OrderRepository orderRepository,\n        NotificationService notificationService\n    ) {\n        this.paymentGateway = paymentGateway;\n        this.orderRepository = orderRepository;\n        this.notificationService = notificationService;\n    }\n\n    \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\n    public OrderResult processOrder(Order order) {\n        try {\n            \/\/ \u652f\u6255\u3044\u51e6\u7406\n            PaymentResult payment = paymentGateway.processPayment(order.getPaymentDetails());\n\n            if (payment.isSuccessful()) {\n                \/\/ \u6ce8\u6587\u306e\u4fdd\u5b58\n                orderRepository.save(order);\n\n                \/\/ \u901a\u77e5\u306e\u9001\u4fe1\n                notificationService.sendOrderConfirmation(order);\n\n                return OrderResult.success(order.getId());\n            } else {\n                return OrderResult.failure(\"\u652f\u6255\u3044\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n            }\n        } catch (Exception e) {\n            return OrderResult.failure(e.getMessage());\n        }\n    }\n}\n\n\/\/ \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\npublic class OrderProcessorTest {\n    @Test\n    public void testSuccessfulOrderProcessing() {\n        \/\/ \u30e2\u30c3\u30af\u306e\u4f5c\u6210\n        PaymentGateway mockPaymentGateway = mock(PaymentGateway.class);\n        OrderRepository mockOrderRepository = mock(OrderRepository.class);\n        NotificationService mockNotificationService = mock(NotificationService.class);\n\n        \/\/ \u30e2\u30c3\u30af\u306e\u632f\u308b\u821e\u3044\u3092\u8a2d\u5b9a\n        when(mockPaymentGateway.processPayment(any()))\n            .thenReturn(PaymentResult.success());\n\n        \/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\n        OrderProcessor processor = new OrderProcessor(\n            mockPaymentGateway,\n            mockOrderRepository,\n            mockNotificationService\n        );\n\n        \/\/ \u30c6\u30b9\u30c8\u306e\u5b9f\u884c\n        Order testOrder = new Order(\/* \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf *\/);\n        OrderResult result = processor.processOrder(testOrder);\n\n        \/\/ \u691c\u8a3c\n        assertTrue(result.isSuccessful());\n        verify(mockOrderRepository).save(testOrder);\n        verify(mockNotificationService).sendOrderConfirmation(testOrder);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-103\">\n<p>\u5b9f\u8df5\u7684\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u6d3b\u7528\u306e\u30dd\u30a4\u30f3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-116\">\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\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u6d3b\u7528\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\"><div id=\"sgb-css-id-104\">\n<p><strong>1. DTO\u30d1\u30bf\u30fc\u30f3<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<p>\u3000\u25cf \u30c7\u30fc\u30bf\u306e\u5909\u63db\u3068\u8ee2\u9001\u3092\u52b9\u7387\u5316<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-106\">\n<p>\u3000\u25cf \u30ec\u30a4\u30e4\u30fc\u9593\u306e\u7d50\u5408\u5ea6\u3092\u4f4e\u6e1b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-107\">\n<p>\u3000\u25cf \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5411\u4e0a\uff08\u6a5f\u5bc6\u30c7\u30fc\u30bf\u306e\u9664\u5916\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-108\">\n<p><strong>2. \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-109\">\n<p>\u3000\u25cf \u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u306e\u7c21\u7565\u5316<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<p>\u3000\u25cf \u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<p>\u3000\u25cf \u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u67d4\u8edf\u306a\u8a2d\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-112\">\n<p><strong>3. \u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-113\">\n<p>\u3000\u25cf \u4f9d\u5b58\u6027\u6ce8\u5165\u306e\u6d3b\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<p>\u3000\u25cf \u30e2\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-115\">\n<p>\u3000\u25cf \u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u4f5c\u6210\u5bb9\u6613\u6027<\/p>\n<\/div><\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-118\">\n<h2 class=\"wp-block-heading\" id=\"i-27\">\u307e\u3068\u3081\uff1a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5b9f\u88c5\u306e\u6210\u529f\u306b\u5411\u3051\u3066<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-119\">\n<h4 class=\"wp-block-heading\" id=\"i-28\">1. \u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u91cd\u8981\u30dd\u30a4\u30f3\u30c8<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-120\">\n<p>\u30001. <strong>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u57fa\u672c\u7684\u5f79\u5272<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-121\">\n<p>\u3000\u3000\u25cf \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u5316\u3092\u62c5\u5f53<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-122\">\n<p>\u3000\u3000\u25cf \u30af\u30e9\u30b9\u306e\u6574\u5408\u6027\u3092\u4fdd\u8a3c<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<p>\u3000\u3000\u25cf \u4e0d\u6b63\u306a\u72b6\u614b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u3092\u9632\u6b62<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-124\">\n<p>\u30002. <strong>\u5b9f\u88c5\u6642\u306e\u57fa\u672c\u539f\u5247<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-125\">\n<p>\u3000\u3000\u25cf \u5fc5\u8981\u6700\u5c0f\u9650\u306e\u521d\u671f\u5316\u51e6\u7406\u306e\u307f\u3092\u884c\u3046<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-126\">\n<p>\u3000\u3000\u25cf \u5f15\u6570\u306e\u59a5\u5f53\u6027\u691c\u8a3c\u3092\u5fc5\u305a\u5b9f\u65bd<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-127\">\n<p>\u3000\u3000\u25cf \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-128\">\n<p>\u30003. <strong>\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-129\">\n<p>\u3000\u3000\u25cf \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<p>\u3000\u3000\u25cf \u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9069\u5207\u306a\u5b9f\u88c5<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-131\">\n<p>\u3000\u3000\u25cf \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-132\">\n<h4 class=\"wp-block-heading\" id=\"i-29\">2. \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5b9f\u88c5\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-133\">\n<p>\u3000\u4ee5\u4e0b\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9f\u88c5\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-134\">\n<p>\u3000\u25cf \u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u306e null \u30c1\u30a7\u30c3\u30af\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-135\">\n<p>\u3000\u25cf \u5024\u306e\u59a5\u5f53\u6027\u691c\u8a3c\u3092\u884c\u3063\u3066\u3044\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-136\">\n<p>\u3000\u25cf \u521d\u671f\u5316\u51e6\u7406\u306f\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u6291\u3048\u3066\u3044\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-137\">\n<p>\u3000\u25cf \u53ef\u5909\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u9632\u885b\u7684\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\u3057\u3066\u3044\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-138\">\n<p>\u3000\u25cf \u5faa\u74b0\u53c2\u7167\u3092\u907f\u3051\u308b\u8a2d\u8a08\u306b\u306a\u3063\u3066\u3044\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<p>\u3000\u25cf \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u3066\u3044\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-140\">\n<p>\u3000\u25cf \u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<h4 class=\"wp-block-heading\" id=\"i-30\">3. \u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-142\">\n<p>\u3000\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u57fa\u672c\u3092\u7406\u89e3\u3057\u305f\u3089\u3001\u4ee5\u4e0b\u306e\u9805\u76ee\u306b\u3082\u53d6\u308a\u7d44\u3093\u3067\u307f\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-143\">\n<p>\u30001. <strong>\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u5b66\u7fd2<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-144\">\n<p>\u3000\u3000\u25cf Factory \u30d1\u30bf\u30fc\u30f3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<p>\u3000\u3000\u25cf Abstract Factory \u30d1\u30bf\u30fc\u30f3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\n<p>\u3000\u3000\u25cf Prototype \u30d1\u30bf\u30fc\u30f3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-147\">\n<p>\u30002. <strong>\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\uff08TDD\uff09\u306e\u5b9f\u8df5<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-148\">\n<p>\u3000\u3000\u25cf \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u4f5c\u6210<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-149\">\n<p>\u3000\u3000\u25cf \u30e2\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6d3b\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-150\">\n<p>\u3000\u3000\u25cf \u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u8a2d\u8a08<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-151\">\n<p>\u30003. <strong>\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u6d3b\u7528<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-152\">\n<p>\u3000\u3000\u25cf DTO\u306e\u5b9f\u88c5<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-153\">\n<p>\u3000\u3000\u25cf \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a2d\u8a08<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-154\">\n<p>\u3000\u3000\u25cf \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u306e\u30c7\u30fc\u30bf\u8ee2\u9001\u8a2d\u8a08<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-155\">\n<h4 class=\"wp-block-heading\" id=\"i-31\">4. \u767a\u5c55\u7684\u306a\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-156\">\n<p>\u3000\u3088\u308a\u6df1\u3044\u7406\u89e3\u306e\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30c8\u30d4\u30c3\u30af\u306e\u5b66\u7fd2\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-157\">\n<p>\u30001. <strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-158\">\n<p>\u3000\u3000\u25cf SOLID\u539f\u5247<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-159\">\n<p>\u3000\u3000\u25cf \u30af\u30ea\u30fc\u30f3\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-160\">\n<p>\u3000\u3000\u25cf \u30c9\u30e1\u30a4\u30f3\u99c6\u52d5\u8a2d\u8a08\uff08DDD\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-161\">\n<p>\u30002. <strong>\u4e26\u884c\u51e6\u7406\u3068\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-162\">\n<p>\u3000\u3000\u25cf \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u5b9f\u88c5<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-163\">\n<p>\u3000\u3000\u25cf \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6d3b\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-164\">\n<p>\u3000\u3000\u25cf \u4e26\u884c\u51e6\u7406\u30d1\u30bf\u30fc\u30f3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-165\">\n<p>\u30003. <strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u7ba1\u7406<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-166\">\n<p>\u3000\u3000\u25cf \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u9632\u6b62<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-167\">\n<p>\u3000\u3000\u25cf \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u6700\u9069\u5316<\/p>\n<\/div>\n\n\n<p>\u3000\u3000\u25cf \u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/p>\n\n\n\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u790e\u3067\u3042\u308a\u3001\u826f\u8cea\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u5185\u5bb9\u3092\u5b9f\u8df5\u3057\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u3092\u9858\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in 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