{"id":407,"date":"2024-10-24T09:19:33","date_gmt":"2024-10-24T00:19:33","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=407"},"modified":"2025-03-24T08:53:17","modified_gmt":"2025-03-23T23:53:17","slug":"java%e5%88%9d%e5%bf%83%e8%80%85%e5%bf%85%e8%a6%8b%ef%bc%81this%e3%82%ad%e3%83%bc%e3%83%af%e3%83%bc%e3%83%89%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%e8%ac%9b","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=407","title":{"rendered":"Java\u521d\u5fc3\u8005\u5fc5\u898b\uff01&#8217;this&#8217;\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u4f7f\u3044\u65b9\u30de\u30b9\u30bf\u30fc\u8b1b\u5ea7\uff1a5\u3064\u306e\u5b9f\u8df5\u7684\u30c6\u30af\u30cb\u30c3\u30af\u3068\u3088\u304f\u3042\u308b3\u3064\u306e\u843d\u3068\u3057\u7a74"},"content":{"rendered":"<div id=\"sgb-css-id-1\">\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">\uff11\uff0e \u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u306f\uff1fJava\u306e\u57fa\u672c\u4e2d\u306e\u57fa\u672c\u3092\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u2018this\u2019\u304c\u6307\u3057\u793a\u3059\u3082\u306e\u3068\u305d\u306e\u91cd\u8981\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u533a\u5225\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">\uff12\uff0e\u2019this\u2019\u306e5\u3064\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">1. \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u306e\u885d\u7a81\u56de\u907f<\/a>      <\/li>      <li>        <a href=\"#i-5\">2. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u306e\u5b9f\u73fe\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-6\">3. \u73fe\u5728\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-7\">4. \u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u547c\u3073\u51fa\u3057<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">5. \u5185\u90e8\u30af\u30e9\u30b9\u304b\u3089\u5916\u90e8\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u30a2\u30af\u30bb\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">\uff13\uff0e\u2019this\u2019\u4f7f\u7528\u6642\u306b\u3088\u304f\u3042\u308b3\u3064\u306e\u843d\u3068\u3057\u7a74\u3068\u56de\u907f\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">1. \u9759\u7684\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306e\u8aa4\u7528\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-11\">2. \u4e0d\u5fc5\u8981\u306a\u2019this\u2019\u306e\u4e71\u7528\u304c\u3082\u305f\u3089\u3059\u53ef\u8aad\u6027\u4f4e\u4e0b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">3. \u2018this\u2019\u3068\u2019super\u2019\u306e\u6df7\u540c\uff1a\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\uff14\uff0e\u2019this\u2019\u3092\u4f7f\u3063\u305f\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\uff1a\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3068\u306e\u95a2\u9023<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">Builder\u30d1\u30bf\u30fc\u30f3\u306b\u304a\u3051\u308b\u2019this\u2019\u306e\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">Singleton\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u2019this\u2019\u306e\u5f79\u5272<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-16\">\uff15\uff0e\u2019this\u2019\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u306b\u3088\u308b\u30b3\u30fc\u30c9\u54c1\u8cea\u5411\u4e0a<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u30ab\u30d7\u30bb\u30eb\u5316\u306e\u5f37\u5316\uff1agetter\u3068setter\u3067\u306e\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30b3\u30fc\u30c9\u306e\u81ea\u5df1\u6587\u66f8\u5316\uff1a\u2019this\u2019\u3067\u660e\u793a\u7684\u306b\u793a\u3059\u610f\u56f3<\/a>      <\/li>      <li>        <a href=\"#i-19\">\u2018this\u2019\u306e\u9069\u5207\u306a\u4f7f\u7528\u306b\u3088\u308b\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-20\">\u2018this\u2019\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u306b\u95a2\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-21\">\uff16\uff0e\u307e\u3068\u3081\uff1a\u2019this\u2019\u306e\u7406\u89e3\u304cJava\u30de\u30b9\u30bf\u30fc\u3078\u306e\u7b2c\u4e00\u6b69<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-22\">\u5fa9\u7fd2\uff1a\u2019this\u2019\u306e5\u3064\u306e\u4f7f\u3044\u65b9\u30683\u3064\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\uff1a\u3088\u308a\u9ad8\u5ea6\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u6982\u5ff5\u3078<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">\uff11\uff0e \u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u306f\uff1fJava\u306e\u57fa\u672c\u4e2d\u306e\u57fa\u672c\u3092\u89e3\u8aac<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u3076\u4e0a\u3067\u3001\u2019this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u7406\u89e3\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u2019this\u2019\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u6838\u5fc3\u90e8\u5206\u306b\u89e6\u308c\u308b\u6982\u5ff5\u3067\u3042\u308a\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u2018this\u2019\u304c\u6307\u3057\u793a\u3059\u3082\u306e\u3068\u305d\u306e\u91cd\u8981\u6027<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3001\u73fe\u5728\u5b9f\u884c\u4e2d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53c2\u7167\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">this \u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u6a5f\u80fd<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-5\">\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u5185\uff1a\u73fe\u5728\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u3059\u3002<\/li>\n<\/div>\n\n\n<li>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\uff1a\u65b0\u3057\u304f\u4f5c\u6210\u3055\u308c\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-6\">\n<p>\u2018this\u2019\u306e\u91cd\u8981\u6027\u306f\u4ee5\u4e0b\u306e\u70b9\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\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\">this \u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u91cd\u8981\u6027<\/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-7\">\n<li>\u540d\u524d\u306e\u885d\u7a81\u56de\u907f\uff1a\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u540d\u304c\u540c\u3058\u5834\u5408\u306b\u3001\u533a\u5225\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a\uff1a\u3069\u306e\u5909\u6570\u304c\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u3067\u3042\u308b\u304b\u3092\u660e\u78ba\u306b\u3059\u308b\u3002<\/li>\n<\/div>\n\n\n<li>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u306e\u5b9f\u73fe\uff1a\u30e1\u30bd\u30c3\u30c9\u304c\u73fe\u5728\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3053\u3068\u3092\u53ef\u80fd\u306b\u3059\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u533a\u5225\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<p>\u2018this\u2019\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u9055\u3044\u3092\u77e5\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"id-a573742f-0e82-43c3-9e21-008f3315e3af\"><div id=\"sgb-css-id-12\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5909\u6570\u306e\u7a2e\u985e<\/th><th>\u5b9a\u7fa9\u3055\u308c\u308b\u5834\u6240<\/th><th>\u5b58\u5728\u671f\u9593<\/th><th>\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5<\/th><\/tr><\/thead><tbody><tr><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/td><td>\u30af\u30e9\u30b9\u5185<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u4e2d<\/td><td>this.\u5909\u6570\u540d \u307e\u305f\u306f \u76f4\u63a5\u5909\u6570\u540d<\/td><\/tr><tr><td>\u30ed\u30fc\u30ab\u30eb\u5909\u6570<\/td><td>\u30e1\u30bd\u30c3\u30c9\u5185<\/td><td>\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u884c\u4e2d\u306e\u307f<\/td><td>\u5909\u6570\u540d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-13\">\n<p>\u2018this\u2019\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u308c\u3089\u306e\u5909\u6570\u3092\u660e\u78ba\u306b\u533a\u5225\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-14\">\n<p>\u4ee5\u4e0b\u306b\u3001\u2019this\u2019\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\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 Person {\n    private String name; \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\n\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u306e\u885d\u7a81\u56de\u907f\n    public Person(String name) {\n        this.name = name; \/\/ this\u3092\u4f7f\u3063\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u53c2\u7167\n    }\n\n    \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u306e\u4f7f\u7528\n    public void printName() {\n        System.out.println(\"My name is \" + this.name);\n    }\n\n    \/\/ \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u306e\u4f8b\n    public Person setName(String name) {\n        this.name = name;\n        return this; \/\/ \u73fe\u5728\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nPerson person = new Person(\"Alice\");\nperson.printName(); \/\/ \u51fa\u529b: My name is Alice\nperson.setName(\"Bob\").printName(); \/\/ \u51fa\u529b: My name is Bob<\/pre>\n\n\n<div id=\"sgb-css-id-15\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u4f8b\u3067\u306f\u3001\u2019this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u540d\u524d\u306e\u885d\u7a81\u3092\u56de\u907f\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u2019this\u2019\u3092\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-16\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u9069\u5207\u306a\u4f7f\u7528\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u308b\u91cd\u8981\u306a\u4e00\u6b69\u3068\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u2019this\u2019\u306e\u3088\u308a\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-17\">\n<h2 class=\"wp-block-heading\" id=\"i-3\">\uff12\uff0e\u2019this\u2019\u306e5\u3064\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u2019this\u2019\u306e5\u3064\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002\u5404\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3068\u5171\u306b\u3001\u305d\u306e\u5229\u70b9\u3068\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u306e\u5fdc\u7528\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-19\">\n<h3 class=\"wp-block-heading\" id=\"i-4\">1. \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u306e\u885d\u7a81\u56de\u907f<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-20\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u540d\u304c\u540c\u3058\u5834\u5408\u3001\u2019this\u2019\u3092\u4f7f\u7528\u3057\u3066\u660e\u78ba\u306b\u533a\u5225\u3059\u308b\u3053\u3068\u304c\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    \/\/ this\u3092\u4f7f\u7528\u3057\u3066\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u306e\u885d\u7a81\u3092\u56de\u907f\n    public Person(String name, int age) {\n        this.name = name; \/\/ this.name\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3001name\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\n        this.age = age;   \/\/ this.age\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3001age\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\n    }\n\n    \/\/ getter \u30e1\u30bd\u30c3\u30c9\n    public String getName() {\n        return this.name; \/\/ this\u306e\u4f7f\u7528\u306f\u4efb\u610f\u3060\u304c\u3001\u660e\u78ba\u3055\u306e\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\n    }\n\n    public int getAge() {\n        return age; \/\/ this\u3092\u7701\u7565\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-22\">\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\">\u3053\u306e\u65b9\u6cd5\u306e\u5229\u70b9<\/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-21\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3059\u308b<\/li>\n<\/div>\n\n\n<li>\u5909\u6570\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u30d0\u30b0\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">2. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u306e\u5b9f\u73fe\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<p>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u306f\u3001\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u3092\u4e00\u884c\u3067\u9023\u9396\u7684\u306b\u884c\u3046\u6280\u6cd5\u3067\u3059\u3002\u2019this\u2019\u3092\u8fd4\u3059\u3053\u3068\u3067\u5b9f\u73fe\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 StringBuilder {\n    private String str = \"\";\n\n    \/\/ \u6587\u5b57\u5217\u3092\u8ffd\u52a0\u3057\u3001this\u3092\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\n    public StringBuilder append(String s) {\n        this.str += s;\n        return this; \/\/ \u81ea\u8eab\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\n    }\n\n    \/\/ \u73fe\u5728\u306e\u6587\u5b57\u5217\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30bd\u30c3\u30c9\n    public String toString() {\n        return this.str;\n    }\n\n    public static void main(String[] args) {\n        StringBuilder sb = new StringBuilder();\n        String result = sb.append(\"Hello\")\n                          .append(\" \")\n                          .append(\"World\")\n                          .toString();\n        System.out.println(result); \/\/ \u51fa\u529b: Hello World\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-26\">\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\">\u3053\u306e\u65b9\u6cd5\u306e\u5229\u70b9<\/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-25\">\n<li>\u30b3\u30fc\u30c9\u304c\u3088\u308a\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u304f\u306a\u308b<\/li>\n<\/div>\n\n\n<li>\u8907\u6570\u306e\u64cd\u4f5c\u3092\u9023\u7d9a\u3057\u3066\u884c\u3046\u969b\u306b\u4fbf\u5229<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<h3 class=\"wp-block-heading\" id=\"i-6\">3. \u73fe\u5728\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<p>\u2018this\u2019\u3092\u4f7f\u7528\u3057\u3066\u3001\u73fe\u5728\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u3053\u3068\u304c\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 Button {\n    private ClickListener listener;\n\n    \/\/ \u30af\u30ea\u30c3\u30af\u30ea\u30b9\u30ca\u30fc\u3092\u8a2d\u5b9a\u3059\u308b\u30e1\u30bd\u30c3\u30c9\n    public void setClickListener(ClickListener listener) {\n        this.listener = listener;\n    }\n\n    \/\/ \u30af\u30ea\u30c3\u30af\u6642\u306e\u51e6\u7406\n    public void click() {\n        if (this.listener != null) {\n            this.listener.onClick(this); \/\/ this\u3092\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\n        }\n    }\n}\n\ninterface ClickListener {\n    void onClick(Button button);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\npublic class Main {\n    public static void main(String[] args) {\n        Button button = new Button();\n        button.setClickListener(new ClickListener() {\n            @Override\n            public void onClick(Button clickedButton) {\n                System.out.println(\"Button clicked: \" + clickedButton);\n            }\n        });\n        button.click(); \/\/ \u30af\u30ea\u30c3\u30af\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-30\">\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\">\u3053\u306e\u65b9\u6cd5\u306e\u5229\u70b9<\/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>\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3084\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u3067\u975e\u5e38\u306b\u6709\u7528<\/li>\n<\/div>\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u9593\u306e\u76f8\u4e92\u4f5c\u7528\u3092\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<h3 class=\"wp-block-heading\" id=\"i-7\">4. \u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u547c\u3073\u51fa\u3057<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\n<p>\u2018this()\u2019\u3092\u4f7f\u7528\u3057\u3066\u3001\u540c\u3058\u30af\u30e9\u30b9\u5185\u306e\u4ed6\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u304c\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    private String address;\n\n    \/\/ \u57fa\u672c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Person(String name, int age, String address) {\n        this.name = name;\n        this.age = age;\n        this.address = address;\n    }\n\n    \/\/ \u540d\u524d\u3068\u5e74\u9f62\u306e\u307f\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Person(String name, int age) {\n        this(name, age, \"Unknown\"); \/\/ \u57fa\u672c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\n    }\n\n    \/\/ \u540d\u524d\u306e\u307f\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    public Person(String name) {\n        this(name, 0); \/\/ \u540d\u524d\u3068\u5e74\u9f62\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\n    }\n\n    \/\/ toString \u30e1\u30bd\u30c3\u30c9\n    @Override\n    public String toString() {\n        return \"Person{name='\" + name + \"', age=\" + age + \", address='\" + address + \"'}\";\n    }\n\n    public static void main(String[] args) {\n        Person p1 = new Person(\"Alice\", 30, \"New York\");\n        Person p2 = new Person(\"Bob\", 25);\n        Person p3 = new Person(\"Charlie\");\n\n        System.out.println(p1); \/\/ Person{name='Alice', age=30, address='New York'}\n        System.out.println(p2); \/\/ Person{name='Bob', age=25, address='Unknown'}\n        System.out.println(p3); \/\/ Person{name='Charlie', age=0, address='Unknown'}\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-34\">\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\">\u3053\u306e\u65b9\u6cd5\u306e\u5229\u70b9<\/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-33\">\n<li>\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u3092\u6e1b\u3089\u305b\u308b<\/li>\n<\/div>\n\n\n<li>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9023\u9396\u7684\u306a\u547c\u3073\u51fa\u3057\u306b\u3088\u308a\u3001\u67d4\u8edf\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u521d\u671f\u5316\u304c\u53ef\u80fd<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-35\">\n<h3 class=\"wp-block-heading\" id=\"i-8\">5. \u5185\u90e8\u30af\u30e9\u30b9\u304b\u3089\u5916\u90e8\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u30a2\u30af\u30bb\u30b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<p>\u5185\u90e8\u30af\u30e9\u30b9\u304b\u3089\u5916\u90e8\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u3001\u2019\u5916\u90e8\u30af\u30e9\u30b9\u540d.this\u2019\u3092\u4f7f\u7528\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 OuterClass {\n    private String outerField = \"Outer Class Field\";\n\n    class InnerClass {\n        private String innerField = \"Inner Class Field\";\n\n        public void accessOuterClass() {\n            \/\/ \u5185\u90e8\u30af\u30e9\u30b9\u304b\u3089\u5916\u90e8\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a2\u30af\u30bb\u30b9\n            System.out.println(\"OuterField: \" + OuterClass.this.outerField);\n\n            \/\/ \u5185\u90e8\u30af\u30e9\u30b9\u81ea\u8eab\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a2\u30af\u30bb\u30b9\n            System.out.println(\"InnerField: \" + this.innerField);\n\n            \/\/ \u5916\u90e8\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\n            OuterClass.this.outerMethod();\n        }\n    }\n\n    public void outerMethod() {\n        System.out.println(\"Outer Class Method\");\n    }\n\n    public static void main(String[] args) {\n        OuterClass outer = new OuterClass();\n        InnerClass inner = outer.new InnerClass();\n        inner.accessOuterClass();\n    }\n}<\/pre>\n\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\">\u3053\u306e\u65b9\u6cd5\u306e\u5229\u70b9<\/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-37\">\n<li>\u8907\u96d1\u306a\u69cb\u9020\u3092\u6301\u3064\u30af\u30e9\u30b9\u306e\u8a2d\u8a08\u306b\u5f79\u7acb\u3064<\/li>\n<\/div>\n\n\n<li>\u5185\u90e8\u30af\u30e9\u30b9\u3068\u5916\u90e8\u30af\u30e9\u30b9\u306e\u95a2\u4fc2\u3092\u660e\u78ba\u306b\u8868\u73fe\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-39\">\n<p>\u3053\u308c\u3089\u306e\u2019this\u2019\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u7406\u89e3\u3057\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044Java\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u2019this\u2019\u4f7f\u7528\u6642\u306b\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u305d\u306e\u56de\u907f\u7b56\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-40\">\n<h2 class=\"wp-block-heading\" id=\"i-9\">\uff13\uff0e\u2019this\u2019\u4f7f\u7528\u6642\u306b\u3088\u304f\u3042\u308b3\u3064\u306e\u843d\u3068\u3057\u7a74\u3068\u56de\u907f\u7b56<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u9069\u5207\u306b\u4f7f\u7528\u3057\u306a\u3044\u3068\u4e88\u671f\u305b\u306c\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u2019this\u2019\u4f7f\u7528\u6642\u306b\u3088\u304f\u3042\u308b3\u3064\u306e\u843d\u3068\u3057\u7a74\u3068\u305d\u306e\u56de\u907f\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u5bfe\u51e6\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306aJava\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-42\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">1. \u9759\u7684\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306e\u8aa4\u7528\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-43\">\n<p>\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3084static\u521d\u671f\u5316\u30d6\u30ed\u30c3\u30af\u5185\u3067\u2019this\u2019\u3092\u4f7f\u7528\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-44\">\n<p>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\u4f8b\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=\"\">public class StaticExample {\n    private static int count = 0;\n\n    public static void incrementCount() {\n        this.count++; \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc: \u9759\u7684\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067this\u306f\u4f7f\u7528\u3067\u304d\u306a\u3044\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-45\">\n<p>\u3053\u306e\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u539f\u56e0\u306f\u3001\u9759\u7684\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u5b58\u5728\u3057\u306a\u3044\u305f\u3081\u3067\u3059\u3002\u9759\u7684\u30e1\u30f3\u30d0\u30fc\u306f\u30af\u30e9\u30b9\u306b\u5c5e\u3057\u3066\u304a\u308a\u3001\u7279\u5b9a\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u306f\u7d10\u3065\u3044\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p>\u56de\u907f\u7b56\uff1a<br>\u9759\u7684\u30e1\u30f3\u30d0\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306b\u306f\u3001\u2019this\u2019\u306e\u4ee3\u308f\u308a\u306b\u30af\u30e9\u30b9\u540d\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<p>\u6b63\u3057\u3044\u30b3\u30fc\u30c9\u4f8b\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=\"\">public class StaticExample {\n    private static int count = 0;\n\n    public static void incrementCount() {\n        StaticExample.count++; \/\/ \u30af\u30e9\u30b9\u540d\u3092\u4f7f\u7528\u3057\u3066\u9759\u7684\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\n    }\n\n    public static void main(String[] args) {\n        StaticExample.incrementCount();\n        System.out.println(\"Count: \" + StaticExample.count); \/\/ \u51fa\u529b: Count: 1\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-48\">\n<h3 class=\"wp-block-heading\" id=\"i-11\">2. \u4e0d\u5fc5\u8981\u306a\u2019this\u2019\u306e\u4e71\u7528\u304c\u3082\u305f\u3089\u3059\u53ef\u8aad\u6027\u4f4e\u4e0b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-49\">\n<p>\u5168\u3066\u306e\u5909\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306b\u2019this\u2019\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30fc\u30c9\u304c\u5197\u9577\u306b\u306a\u308a\u3001\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-50\">\n<p>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\u4f8b\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=\"\">public class OveruseThis {\n    private int value;\n\n    public void setValue(int value) {\n        this.value = value;\n    }\n\n    public int getValue() {\n        return this.value; \/\/ \u4e0d\u5fc5\u8981\u306athis\u306e\u4f7f\u7528\n    }\n\n    public void printValue() {\n        System.out.println(this.getValue()); \/\/ \u4e0d\u5fc5\u8981\u306athis\u306e\u4f7f\u7528\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-51\">\n<p>\u56de\u907f\u7b56\uff1a<br>\u2018this\u2019\u306f\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u4f7f\u7528\u3057\u3001\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u4fdd\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<p>\u6539\u5584\u3055\u308c\u305f\u30b3\u30fc\u30c9\u4f8b\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=\"\">public class ImprovedUseThis {\n    private int value;\n\n    public void setValue(int value) {\n        this.value = value; \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u304c\u540c\u3058\u5834\u5408\u306fthis\u3092\u4f7f\u7528\n    }\n\n    public int getValue() {\n        return value; \/\/ this\u306f\u7701\u7565\u53ef\u80fd\n    }\n\n    public void printValue() {\n        System.out.println(getValue()); \/\/ this\u306f\u7701\u7565\u53ef\u80fd\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-53\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">3. \u2018this\u2019\u3068\u2019super\u2019\u306e\u6df7\u540c\uff1a\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u306e\u6ce8\u610f\u70b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<p>\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u2019this\u2019\u3068\u2019super\u2019\u3092\u6df7\u540c\u3057\u3066\u4f7f\u7528\u3059\u308b\u3068\u3001\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<p>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\u4f8b\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=\"\">class Parent {\n    protected int value = 10;\n    \n    public void print() {\n        System.out.println(\"Parent value: \" + value);\n    }\n}\n\nclass Child extends Parent {\n    private int value = 20;\n    \n    public void printValues() {\n        System.out.println(\"Child value: \" + this.value);\n        System.out.println(\"Parent value: \" + this.value); \/\/ \u8aa4\u308a\uff1a\u89aa\u30af\u30e9\u30b9\u306e\u5024\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\n        this.print(); \/\/ \u5b50\u30af\u30e9\u30b9\u306eprint\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\uff08\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3070\u308c\u308b\uff09\n    }\n\n    @Override\n    public void print() {\n        System.out.println(\"Child value: \" + value);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-56\">\n<p>\u3053\u306e\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u539f\u56e0\u306f\u3001\u7d99\u627f\u95a2\u4fc2\u306b\u304a\u3051\u308b\u5909\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u30b9\u30b3\u30fc\u30d7\u306e\u8aa4\u89e3\u3067\u3059\u3002\u2019this\u2019\u306f\u73fe\u5728\u306e\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u53c2\u7167\u3057\u307e\u3059\u304c\u3001\u89aa\u30af\u30e9\u30b9\u306e\u540c\u540d\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u96a0\u853d\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-57\">\n<p>\u56de\u907f\u7b56\uff1a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-58\">\n<p> \u2018this\u2019\u3068\u2019super\u2019\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u307e\u3059\u3002\u2019super\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002 <\/p>\n<\/div>\n\n<div id=\"sgb-css-id-59\">\n<p>\u6539\u5584\u3055\u308c\u305f\u30b3\u30fc\u30c9\u4f8b\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=\"\">class Parent {\n    protected int value = 10;\n\n    public void print() {\n        System.out.println(\"Parent value: \" + value);\n    }\n}\n\nclass Child extends Parent {\n    private int value = 20;\n\n    public void printValues() {\n        System.out.println(\"Child value: \" + this.value);\n        System.out.println(\"Parent value: \" + super.value); \/\/ super\u3092\u4f7f\u7528\u3057\u3066\u89aa\u30af\u30e9\u30b9\u306e\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\n        this.print(); \/\/ \u5b50\u30af\u30e9\u30b9\u306eprint\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\n        super.print(); \/\/ \u89aa\u30af\u30e9\u30b9\u306eprint\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\n    }\n\n    @Override\n    public void print() {\n        System.out.println(\"Child value: \" + value);\n    }\n\n    public static void main(String[] args) {\n        Child child = new Child();\n        child.printValues();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-60\">\n<p>\u51fa\u529b\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=\"\">Child value: 20\nParent value: 10\nChild value: 20\nParent value: 10<\/pre>\n\n\n\n<p>\u3053\u306e\u6539\u5584\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3067\u306f\u3001\u2019this\u2019\u3068\u2019super\u2019\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u5b50\u30af\u30e9\u30b9\u3068\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u660e\u78ba\u306b\u533a\u5225\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\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\">\u3053\u308c\u3089\u306e\u843d\u3068\u3057\u7a74\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-61\">\n<li>\u9759\u7684\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306f\u2019this\u2019\u3092\u4f7f\u7528\u305b\u305a\u3001\u30af\u30e9\u30b9\u540d\u3092\u4f7f\u7528\u3057\u3066\u9759\u7684\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<li>\u2018this\u2019\u306f\u5fc5\u8981\u306a\u5834\u5408\uff08\u4f8b\uff1a\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u540d\u304c\u540c\u3058\u5834\u5408\uff09\u306b\u306e\u307f\u4f7f\u7528\u3057\u3001\u904e\u5270\u306a\u4f7f\u7528\u3092\u907f\u3051\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<li>\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u306f\u2019this\u2019\u3068\u2019super\u2019\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3002\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306f\u2019super\u2019\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<li>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3092\u884c\u3044\u3001\u2019this\u2019\u306e\u4f7f\u7528\u304c\u9069\u5207\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002<\/li>\n<\/div>\n\n\n<li>IDE\u306e\u8b66\u544a\u3084\u30d2\u30f3\u30c8\u3092\u6d3b\u7528\u3057\u3001\u4e0d\u8981\u306a\u2019this\u2019\u306e\u4f7f\u7528\u3092\u691c\u51fa\u3059\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-65\">\n<p>\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3092\u5b88\u308b\u3053\u3068\u3067\u3001\u2019this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3057\u3001\u3088\u308a\u660e\u78ba\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044Java\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u2019this\u2019\u3092\u4f7f\u3063\u305f\u3088\u308a\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-66\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3001\u5358\u7d14\u306a\u5909\u6570\u53c2\u7167\u3084\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u3060\u3051\u3067\u306a\u304f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3082\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u7279\u306b\u3001\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306b\u304a\u3044\u3066\u2019this\u2019\u306f\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Builder\u30d1\u30bf\u30fc\u30f3\u3068Singleton\u30d1\u30bf\u30fc\u30f3\u3092\u4f8b\u306b\u3001\u2019this\u2019\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u63a2\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-67\">\n<h2 class=\"wp-block-heading\" id=\"i-13\">\uff14\uff0e\u2019this\u2019\u3092\u4f7f\u3063\u305f\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\uff1a\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3068\u306e\u95a2\u9023<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-68\">\n<h3 class=\"wp-block-heading\" id=\"i-14\">Builder\u30d1\u30bf\u30fc\u30f3\u306b\u304a\u3051\u308b\u2019this\u2019\u306e\u6d3b\u7528\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-69\">\n<p>Builder\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u69cb\u7bc9\u30d7\u30ed\u30bb\u30b9\u3092\u6bb5\u968e\u7684\u306b\u884c\u3046\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u2019this\u2019\u3092\u5de7\u307f\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6d41\u66a2\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff08Fluent Interface\uff09\u3092\u5b9f\u73fe\u3057\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4f7f\u3044\u3084\u3059\u3055\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\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    private String address;\n\n    private Person() {}\n\n    public static class Builder {\n        private Person person = new Person();\n\n        public Builder name(String name) {\n            person.name = name;\n            return this; \/\/ \u3053\u306eBuilder\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\n        }\n\n        public Builder age(int age) {\n            person.age = age;\n            return this; \/\/ \u3053\u306eBuilder\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\n        }\n\n        public Builder address(String address) {\n            person.address = address;\n            return this; \/\/ \u3053\u306eBuilder\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\n        }\n\n        public Person build() {\n            return person;\n        }\n    }\n\n    @Override\n    public String toString() {\n        return \"Person{name='\" + name + \"', age=\" + age + \", address='\" + address + \"'}\";\n    }\n\n    public static void main(String[] args) {\n        Person person = new Person.Builder()\n                .name(\"Alice\")\n                .age(30)\n                .address(\"New York\")\n                .build();\n        System.out.println(person);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-70\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u5404\u30bb\u30c3\u30bf\u30fc\u30e1\u30bd\u30c3\u30c9\uff08<code>name()<\/code>, <code>age()<\/code>, <code>address()<\/code>\uff09\u304c<code>this<\/code>\u3092\u8fd4\u3059\u3053\u3068\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u3092\u53ef\u80fd\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u69cb\u7bc9\u904e\u7a0b\u304c\u76f4\u611f\u7684\u3067\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-71\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">Singleton\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u2019this\u2019\u306e\u5f79\u5272<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<p>Singleton\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c1\u3064\u3057\u304b\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u2019this\u2019\u3092\u4f7f\u7528\u3057\u3066\u552f\u4e00\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Singleton {\n    private static Singleton instance;\n\n    private Singleton() {}\n\n    public static Singleton getInstance() {\n        if (instance == null) {\n            instance = new Singleton();\n        }\n        return instance;\n    }\n\n    public void showMessage() {\n        System.out.println(\"Hello, I am a singleton!\");\n    }\n\n    public static void main(String[] args) {\n        Singleton singleton = Singleton.getInstance();\n        singleton.showMessage();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-73\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001<code>getInstance()<\/code>\u30e1\u30bd\u30c3\u30c9\u5185\u3067<code>new Singleton()<\/code>\u3092\u4f7f\u3063\u3066\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u6697\u9ed9\u7684\u306b<code>this<\/code>\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u7b49\u3057\u3044\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<p>\u3053\u308c\u3089\u306e\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306b\u304a\u3051\u308b\u2019this\u2019\u306e\u4f7f\u7528\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#009EF3;color:#FFF\" class=\"sgb-box-simple__title\">\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306b\u304a\u3051\u308b\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-75\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a\uff1a\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u306b\u3088\u308a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u69cb\u7bc9\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u660e\u78ba\u306b\u306a\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-76\">\n<li>\u67d4\u8edf\u6027\uff1aBuilder\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u69cb\u7bc9\u9806\u5e8f\u3092\u81ea\u7531\u306b\u5909\u66f4\u3067\u304d\u308b\u3002<\/li>\n<\/div>\n\n\n<li>\u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u7ba1\u7406\uff1aSingleton\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u5171\u6709\u3068\u30b0\u30ed\u30fc\u30d0\u30eb\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8\u3092\u63d0\u4f9b\u3059\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-77\">\n<p>\u305f\u3060\u3057\u3001\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#ffb36b;color:#FFF\" class=\"sgb-box-simple__title\">\u6ce8\u610f\u70b9<\/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-78\">\n<li>Builder\u30d1\u30bf\u30fc\u30f3\uff1a\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u306e\u307f\u4f7f\u7528\u3057\u3001\u5358\u7d14\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u901a\u5e38\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/div>\n\n\n<li>Singleton\u30d1\u30bf\u30fc\u30f3\uff1a\u30b0\u30ed\u30fc\u30d0\u30eb\u72b6\u614b\u306e\u7ba1\u7406\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3001\u30c6\u30b9\u30c8\u306e\u56f0\u96e3\u3055\u3084\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u554f\u984c\u306b\u6ce8\u610f\u3059\u308b\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-79\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u7406\u89e3\u3057\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044Java\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u2019this\u2019\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u306b\u3088\u308b\u30b3\u30fc\u30c9\u54c1\u8cea\u5411\u4e0a\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-80\">\n<h2 class=\"wp-block-heading\" id=\"i-16\">\uff15\uff0e\u2019this\u2019\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u306b\u3088\u308b\u30b3\u30fc\u30c9\u54c1\u8cea\u5411\u4e0a<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-81\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3001\u5358\u306a\u308b\u6587\u6cd5\u4e0a\u306e\u6b63\u78ba\u3055\u3060\u3051\u3067\u306a\u304f\u3001\u30b3\u30fc\u30c9\u5168\u4f53\u306e\u54c1\u8cea\u5411\u4e0a\u306b\u3082\u5927\u304d\u304f\u8ca2\u732e\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u2019this\u2019\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u304c\u3069\u306e\u3088\u3046\u306b\u3057\u3066\u30b3\u30fc\u30c9\u54c1\u8cea\u3092\u5411\u4e0a\u3055\u305b\u308b\u304b\u3092\u3001\u5177\u4f53\u7684\u306a\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-82\">\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30ab\u30d7\u30bb\u30eb\u5316\u306e\u5f37\u5316\uff1agetter\u3068setter\u3067\u306e\u6d3b\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-83\">\n<p>\u30ab\u30d7\u30bb\u30eb\u5316\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u91cd\u8981\u306a\u539f\u5247\u306e\u4e00\u3064\u3067\u3059\u3002\u2019this\u2019\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5f37\u529b\u306a\u30ab\u30d7\u30bb\u30eb\u5316\u3092\u5b9f\u73fe\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 Employee {\n    private String name;\n    private double salary;\n\n    public Employee(String name, double salary) {\n        this.name = name;\n        this.salary = salary;\n    }\n\n    public String getName() {\n        return this.name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public double getSalary() {\n        return this.salary;\n    }\n\n    public void setSalary(double salary) {\n        if (salary &gt; 0) {\n            this.salary = salary;\n        } else {\n            throw new IllegalArgumentException(\"Salary must be positive\");\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-84\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u2019this\u2019\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u4ee5\u4e0b\u306e\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-87\">\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\">\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-85\">\n<li>\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u5909\u6570\u3078\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\uff1a\u2019this\u2019\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u660e\u78ba\u306b\u533a\u5225\u3067\u304d\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<li>\u540d\u524d\u306e\u885d\u7a81\u56de\u907f\uff1a\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u540d\u304c\u540c\u3058\u5834\u5408\u3067\u3082\u3001\u6df7\u4e71\u306a\u304f\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3002<\/li>\n<\/div>\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u7dad\u6301\uff1a\u5168\u3066\u306egetter\u3068setter\u3067\u540c\u3058\u65b9\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u304c\u4fdd\u305f\u308c\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-88\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30b3\u30fc\u30c9\u306e\u81ea\u5df1\u6587\u66f8\u5316\uff1a\u2019this\u2019\u3067\u660e\u793a\u7684\u306b\u793a\u3059\u610f\u56f3<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\n<p>\u2018this\u2019\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u3092\u3088\u308a\u660e\u78ba\u306b\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u4e00\u7a2e\u306e\u81ea\u5df1\u6587\u66f8\u5316\u3068\u8a00\u3048\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 Counter {\n    private int count;\n\n    public void increment() {\n        this.count++;\n    }\n\n    public void reset() {\n        this.count = 0;\n    }\n\n    public void addTo(Counter other) {\n        other.count += this.count;\n    }\n\n    public int getCount() {\n        return this.count;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-90\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u2019this\u2019\u306e\u4f7f\u7528\u306b\u3088\u308a\u4ee5\u4e0b\u306e\u70b9\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\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\"><code>this<\/code> \u306e\u4f7f\u7528\u306b\u3088\u308a\u660e\u78ba\u306b\u306a\u308b\u3053\u3068<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-91\">\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u533a\u5225\uff1a\u2019this.count\u2019\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3067\u3042\u308b\u3053\u3068\u304c\u4e00\u76ee\u3067\u5206\u304b\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<li>\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u5143\u306e\u660e\u78ba\u5316\uff1a\u2019addTo\u2019\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u3001\u2019this.count\u2019\u306f\u73fe\u5728\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u2019count\u2019\u3092\u6307\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u660e\u78ba\u3067\u3042\u308b\u3002<\/li>\n<\/div>\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a\uff1a\u5909\u6570\u306e\u7bc4\u56f2\uff08\u30b9\u30b3\u30fc\u30d7\uff09\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u7406\u89e3\u304c\u5bb9\u6613\u306b\u306a\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u2018this\u2019\u306e\u9069\u5207\u306a\u4f7f\u7528\u306b\u3088\u308b\u30e1\u30ea\u30c3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\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\">\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u30e1\u30ea\u30c3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-95\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a\uff1a\u2019this\u2019\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5909\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u6240\u5c5e\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u304c\u8aad\u307f\u3084\u3059\u304f\u306a\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<li>\u4fdd\u5b88\u6027\u306e\u6539\u5584\uff1a\u610f\u56f3\u304c\u660e\u78ba\u306a\u30b3\u30fc\u30c9\u306f\u3001\u5f8c\u304b\u3089\u4fee\u6b63\u3084\u62e1\u5f35\u3092\u884c\u3046\u969b\u306b\u3082\u7406\u89e3\u3057\u3084\u3059\u304f\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u307e\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<li>\u518d\u5229\u7528\u6027\u306e\u4fc3\u9032\uff1a\u9069\u5207\u306b\u30ab\u30d7\u30bb\u30eb\u5316\u3055\u308c\u305f\u30af\u30e9\u30b9\u306f\u3001\u4ed6\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u518d\u5229\u7528\u3057\u3084\u3059\u3044\u3002<\/li>\n<\/div>\n\n\n<li>\u30d0\u30b0\u306e\u6e1b\u5c11\uff1a\u5909\u6570\u306e\u7bc4\u56f2\u304c\u660e\u78ba\u306b\u306a\u308b\u3053\u3068\u3067\u3001\u610f\u56f3\u3057\u306a\u3044\u5909\u6570\u306e\u4f7f\u7528\u306b\u3088\u308b\u30d0\u30b0\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u2018this\u2019\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u306b\u95a2\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u52b9\u679c\u7684\u306a\u4f7f\u7528\u306b\u95a2\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-100\">\n<li>\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u4f7f\u7528\u3059\u308b\uff1a\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u540d\u304c\u885d\u7a81\u3059\u308b\u5834\u5408\u306a\u3069\u3001\u5fc5\u8981\u306a\u6642\u306b\u306e\u307f\u2019this\u2019\u3092\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-101\">\n<li>\u4e00\u8cab\u6027\u3092\u4fdd\u3064\uff1a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5185\u3067\u2019this\u2019\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u7d71\u4e00\u3057\u3001\u4e00\u8cab\u6027\u3092\u4fdd\u3061\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<li>IDE\u306e\u652f\u63f4\u3092\u6d3b\u7528\u3059\u308b\uff1a\u591a\u304f\u306eIDE\u306f\u4e0d\u8981\u306a\u2019this\u2019\u306e\u4f7f\u7528\u3092\u8b66\u544a\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u8b66\u544a\u3092\u6d3b\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n\n<li>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u78ba\u8a8d\u3059\u308b\uff1a\u2019this\u2019\u306e\u9069\u5207\u306a\u4f7f\u7528\u3092\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u78ba\u8a8d\u9805\u76ee\u306e\u4e00\u3064\u3068\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u826f\u3044\u4f8b\npublic class GoodExample {\n    private int value;\n\n    public void setValue(int value) {\n        this.value = value; \/\/ 'this'\u306e\u4f7f\u7528\u304c\u9069\u5207\n    }\n\n    public int getValue() {\n        return value; \/\/ 'this'\u306f\u4e0d\u8981\u306a\u306e\u3067\u7701\u7565\n    }\n}\n\n\/\/ \u60aa\u3044\u4f8b\npublic class BadExample {\n    private int value;\n\n    public void setValue(int value) {\n        value = value; \/\/ \u6df7\u4e71\u3092\u62db\u304f\u53ef\u80fd\u6027\u304c\u3042\u308b\n    }\n\n    public int getValue() {\n        return this.value; \/\/ \u4e0d\u8981\u306a'this'\u306e\u4f7f\u7528\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-104\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u30b9\u30ad\u30eb\u306e\u4e00\u3064\u3067\u3059\u3002\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5e38\u306b\u610f\u8b58\u7684\u306b\u2019this\u2019\u3092\u4f7f\u7528\u3057\u3001\u30af\u30ea\u30fc\u30f3\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3088\u3046\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<h2 class=\"wp-block-heading\" id=\"i-21\">\uff16\uff0e\u307e\u3068\u3081\uff1a\u2019this\u2019\u306e\u7406\u89e3\u304cJava\u30de\u30b9\u30bf\u30fc\u3078\u306e\u7b2c\u4e00\u6b69<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-106\">\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u2019this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u91cd\u8981\u6027\u3068\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u2019this\u2019\u306e\u7406\u89e3\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u672c\u3092\u638c\u63e1\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u306a\u4e00\u6b69\u3067\u3059\u3002\u3053\u3053\u3067\u3001\u4e3b\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u632f\u308a\u8fd4\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-107\">\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u5fa9\u7fd2\uff1a\u2019this\u2019\u306e5\u3064\u306e\u4f7f\u3044\u65b9\u30683\u3064\u306e\u6ce8\u610f\u70b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-108\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306e5\u3064\u306e\u4e3b\u8981\u306a\u4f7f\u7528\u65b9\u6cd5<\/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\">\u4e3b\u8981\u306a\u4f7f\u7528\u65b9\u6cd5<\/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-109\">\n<li>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u306e\u885d\u7a81\u56de\u907f<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<li>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30cb\u30f3\u30b0\u306e\u5b9f\u73fe\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<li>\u73fe\u5728\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u65b9\u6cd5<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-112\">\n<li>\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u547c\u3073\u51fa\u3057<\/li>\n<\/div>\n\n\n<li>\u5185\u90e8\u30af\u30e9\u30b9\u304b\u3089\u5916\u90e8\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u30a2\u30af\u30bb\u30b9<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-113\">\n<p>\u540c\u6642\u306b\u3001\u2019this\u2019\u4f7f\u7528\u6642\u306e3\u3064\u306e\u91cd\u8981\u306a\u6ce8\u610f\u70b9\u3082\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\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:#ffb36b;color:#FFF\" class=\"sgb-box-simple__title\">\u91cd\u8981\u306a\u6ce8\u610f\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#ffb36b;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-114\">\n<li>\u9759\u7684\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306e\u8aa4\u7528\u3092\u907f\u3051\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-115\">\n<li>\u4e0d\u5fc5\u8981\u306a\u2019this\u2019\u306e\u4e71\u7528\u3092\u63a7\u3048\u308b<\/li>\n<\/div>\n\n\n<li>\u2018this\u2019\u3068\u2019super\u2019\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<p>\u3053\u308c\u3089\u306e\u4f7f\u7528\u65b9\u6cd5\u3068\u6ce8\u610f\u70b9\u3092\u9069\u5207\u306b\u7406\u89e3\u3057\u3001\u5b9f\u8df5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044Java\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-118\">\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\uff1a\u3088\u308a\u9ad8\u5ea6\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u6982\u5ff5\u3078<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-119\">\n<p>\u2018this\u2019\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u7406\u89e3\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30ad\u30eb\u5411\u4e0a\u3078\u306e\u91cd\u8981\u306a\u4e00\u6b69\u3067\u3059\u304c\u3001\u3053\u308c\u306f\u307b\u3093\u306e\u59cb\u307e\u308a\u306b\u904e\u304e\u307e\u305b\u3093\u3002\u3055\u3089\u306a\u308b\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u306e\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u9ad8\u5ea6\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u6982\u5ff5\u306e\u5b66\u7fd2\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u6b21\u30b9\u30c6\u30c3\u30d7\u3078\u306e\u5b66\u7fd2<\/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-120\">\n<li>\u7d99\u627f\u3068\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u7406\u89e3\u3057\u3001\u6d3b\u7528\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-121\">\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u62bd\u8c61\u30af\u30e9\u30b9\uff1a\u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u8a2d\u8a08\u3092\u5b66\u3076<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-122\">\n<li>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\uff1a\u578b\u5b89\u5168\u6027\u3068\u518d\u5229\u7528\u6027\u3092\u9ad8\u3081\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7fd2\u5f97\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<li>\u30e9\u30e0\u30c0\u5f0f\u3068\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff1aJava 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