{"id":22699,"date":"2017-05-08T15:43:55","date_gmt":"2017-05-08T06:43:55","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=22699"},"modified":"2024-05-06T11:42:09","modified_gmt":"2024-05-06T02:42:09","slug":"%e3%80%90java%e5%85%a5%e9%96%80%e3%80%91%e3%82%b8%e3%82%a7%e3%83%8d%e3%83%aa%e3%82%af%e3%82%b9%e7%b7%8f%e7%a7%b0%e5%9e%8b%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/22699","title":{"rendered":"\u3010Java\u5165\u9580\u3011\u30b8\u30a7\u30cd\u30ea\u30af\u30b9(Generics\u30fb\u7dcf\u79f0\u578b)\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"<p>List&lt;\u30c7\u30fc\u30bf\u578b&gt;\u306a\u3069\u306f\u898b\u304b\u3051\u308b\u3053\u3068\u3082\u591a\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u578b\u306b\u306fInteger\u578b\u3084String\u578b\u306a\u3069\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3001\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u3067\u3082\u540c\u3058\u3088\u3046\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u3066\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u6a5f\u80fd\u3092\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3068\u547c\u3073\u3001\u81ea\u4f5c\u306e\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u3067\u3082\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306b\u3064\u3044\u3066\u4ee5\u4e0b\u306e\u5185\u5bb9\u3067\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<div class=\"box01\">\n<ul>\n<li><b>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3068\u306f<\/b><\/li>\n<li><b>\u30af\u30e9\u30b9\u3067\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u3046\u65b9\u6cd5<\/b><\/li>\n<li><b>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3067extends\u3092\u4f7f\u3046\u5834\u5408<\/b><\/li>\n<li><b>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3067super\u3092\u4f7f\u3046\u5834\u5408<\/b><\/li>\n<li><b>\u30e1\u30bd\u30c3\u30c9\u3067\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u3046\u65b9\u6cd5<\/b><\/li>\n<\/ul>\n<\/div>\n<p>\u4eca\u56de\u306f\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306b\u3064\u3044\u3066\u3001\u4f7f\u3044\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\uff01<\/p>\n<p>\u306a\u304a\u3001Java\u306e\u8a18\u4e8b\u306b\u3064\u3044\u3066\u306f\u3001<a href=\"https:\/\/www.sejuku.net\/blog\/148098\" target=\"_blank\" rel=\"noopener\">\u3053\u3061\u3089<\/a>\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9(Generics\u30fb\u7dcf\u79f0\u578b)\u3068\u306f<\/h2>\n<p>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3068\u306f\u300c&lt;&gt;\u300d\u8a18\u53f7\u3067\u56f2\u307e\u308c\u305f\u30c7\u30fc\u30bf\u578b\u540d\u3092\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u306b\u4ed8\u3051\u308b\u3053\u3068\u3067\u3001Integer\u578b\u3084String\u578b\u306a\u3069\u306e\u69d8\u3005\u306a\u578b\u306b\u5bfe\u5fdc\u3059\u308b\u6c4e\u7528\u7684\u306a\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u308b\u6a5f\u80fd\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u308f\u306a\u3044\u3068\u3001\u30c7\u30fc\u30bf\u578b\u306e\u4e0d\u4e00\u81f4\u3067\u5b9f\u884c\u6642\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u7c21\u5358\u306a\u4f8b\u3092\u4e0b\u8a18\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true \">class ClassSample{\r\n    private Object o;\r\n \r\n    public ClassSample(Object o){\r\n        this.o = o;\r\n    }\r\n \r\n    public Object getO(){\r\n        return o;\r\n    }\r\n}\r\n \r\npublic class Main {\r\n \r\n    public static void main(String[] args) {\r\n \r\n        ClassSample cs = new ClassSample(\"Hello\");\r\n        Integer i = (Integer) cs.getO();\r\n        System.out.println(i);\r\n    }\r\n \r\n}<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">Exception in thread \"main\" java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer\r\n    at Main.main(Main.java:18)<\/pre>\n<p>\u3053\u306e\u4f8b\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u51fa\u6765\u307e\u3059\u304c\u3001\u5b9f\u884c\u6642\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u4f8b\u306e\u3088\u3046\u306a\u5b9f\u884c\u6642\u306e\u30a8\u30e9\u30fc\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u6a5f\u80fd\u304c\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3067\u3059\u3002<\/p>\n<h2>\u30af\u30e9\u30b9\u3067\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u3046\u65b9\u6cd5<\/h2>\n<p>\u5148\u307b\u3069\u306e\u4f8b\u306e\u554f\u984c\u306f\u30af\u30e9\u30b9\u3067\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u3048\u3070\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u3046\u65b9\u6cd5\u3092\u307f\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:java decode:true \">class ClassSample&lt;T&gt;{\r\n    private T t;\r\n \r\n    public ClassSample(T t){\r\n        this.t = t;\r\n    }\r\n \r\n    public T getT(){\r\n        return t;\r\n    }\r\n}\r\n \r\npublic class Main {\r\n \r\n    public static void main(String[] args) {\r\n        \/\/ String\u578b\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd\r\n        ClassSample&lt;String&gt; cs1 = new ClassSample&lt;String&gt;(\"Hello\");\r\n        String str = cs1.getT();\r\n        System.out.println(str);\r\n \r\n        \/\/ Integer\u578b\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd\r\n        ClassSample&lt;Integer&gt; cs2 = new ClassSample&lt;Integer&gt;(1);\r\n        Integer i = cs2.getT();\r\n        System.out.println(i);\r\n    }\r\n \r\n}<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">Hello\r\n1<\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306fClassSample\u30af\u30e9\u30b9\u540d\u306b\u7d9a\u3051\u3066\u300c&lt;T&gt;\u300d\u3092\u8a18\u8ff0\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u300c&lt;T&gt;\u300d\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u578b\u306e\u6307\u5b9a\u304cObject\u578b\u304b\u3089T\u578b(\u578b\u5909\u6570)\u306b\u5909\u66f4\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>Main\u30af\u30e9\u30b9\u306emain\u30e1\u30bd\u30c3\u30c9\u3067ClassSample\u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u969b\u306b\u306f\u3001\u30c7\u30fc\u30bf\u578b\u3092\u300c&lt;&gt;\u300d\u8a18\u53f7\u306e\u4e2d\u3067\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u307e\u305aString\u578b\u3067\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306e\u6a5f\u80fd\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001ClassSample\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u547c\u3073\u51fa\u3059getT\u30e1\u30bd\u30c3\u30c9\u306f\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3053\u3068\u306a\u304f\u3001<b>\u6307\u5b9a\u3057\u305f\u578b\u306b\u5024\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3044\u307e\u3059<\/b>\u3002<\/p>\n<p>\u3053\u308c\u306b\u3088\u308a\u5b9f\u884c\u6642\u306b\u30c7\u30fc\u30bf\u578b\u306e\u4e0d\u4e00\u81f4\u3067\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u306a\u304f\u3001String\u578b\u3084Integer\u578b\u306a\u3069\u69d8\u3005\u306a\u578b\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3067extends\u3092\u4f7f\u3046\u5834\u5408<\/h3>\n<p>\u307e\u305f\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u4f7f\u3046\u3053\u3068\u3067\u30c7\u30fc\u30bf\u578b\u3092\u5f8c\u3067\u5ba3\u8a00\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u306f\u3001\u30c7\u30fc\u30bf\u578b\u3092\u5ba3\u8a00\u305b\u305a\u306b\u4e00\u6642\u7684\u306b\u5909\u6570\u3092\u4fdd\u6301\u3059\u308b\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:java decode:true \">class ClassSample&lt;T&gt;{\r\n    private T t;\r\n \r\n    public ClassSample(T t){\r\n        this.t = t;\r\n    }\r\n \r\n    public T getT(){\r\n        return t;\r\n    }\r\n}\r\n \r\npublic class Main {\r\n \r\n    public static void main(String[] args) {\r\n        \/\/ Integer\u578b\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd\r\n        ClassSample&lt;Integer&gt; cs2 = new ClassSample&lt;Integer&gt;(1);\r\n        Integer i = cs2.getT();\r\n        System.out.println(i);\r\n        \r\n        \/\/ \u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u4f7f\u7528 Number\u578b\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd\r\n        ClassSample&lt;? extends Number&gt; cs3;\r\n        cs3 = cs2;\r\n        Number n = cs3.getT();\r\n        System.out.println(n);\r\n    }\r\n \r\n}<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">1\r\n1<\/pre>\n<p>\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001cs3\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b\u969b\u306b\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u8868\u3059\u300c\uff1f\u300d\u8a18\u53f7\u3092\u4f7f\u7528\u3057\u3066\u300c&lt;? extends Number&gt;\u300d\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Integer\u30af\u30e9\u30b9\u306fNumber\u30af\u30e9\u30b9\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u3059\u306e\u3067\u3001\u300c&lt;? extends Number&gt;\u300d\u3067\u5b9a\u7fa9\u3057\u305fcs3\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306bcs2\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3059\u308b\u3068cs3\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3082getT\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001cs2\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067Integer\u578b\u306b\u6307\u5b9a\u3057\u305f\u300c1\u300d\u3092cs3\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306fNumber\u578b\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3067super\u3092\u4f7f\u3046\u5834\u5408<\/h3>\n<p>\u9006\u306bNumber\u578b\u3067\u6307\u5b9a\u3057\u305fcs4\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092Integer\u578b\u3067\u6307\u5b9a\u3057\u305fcs5\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u4ee3\u5165\u3059\u308b\u5834\u5408\u3001getT\u30e1\u30bd\u30c3\u30c9\u306fObject\u578b\u3068\u3057\u3066\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u5834\u5408\u306f\u300cextends\u300d\u53e5\u306e\u4ee3\u308f\u308a\u306b\u300csuper\u300d\u53e5\u3092\u7528\u3044\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:java decode:true \">class ClassSample&lt;T&gt;{\r\n    private T t;\r\n \r\n    public ClassSample(T t){\r\n        this.t = t;\r\n    }\r\n \r\n    public T getT(){\r\n        return t;\r\n    }\r\n}\r\n \r\npublic class Main {\r\n \r\n    public static void main(String[] args) {\r\n        \/\/ \u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u4f7f\u7528 Object\u578b\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd\r\n        ClassSample&lt;Number&gt; cs4 = new ClassSample&lt;Number&gt;(1);\r\n        ClassSample&lt;? super Integer&gt; cs5;\r\n        cs5 = cs4;\r\n        Object o = cs5.getT();\r\n        System.out.println(o);\r\n    }\r\n \r\n}<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">1<\/pre>\n<h2>\u30e1\u30bd\u30c3\u30c9\u3067\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u3046\u65b9\u6cd5<\/h2>\n<p>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306f\u30e1\u30bd\u30c3\u30c9\u306b\u5bfe\u3057\u3066\u3082\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306b\u623b\u308a\u5024\u306e\u578b\u540d\u3067\u3042\u308bT\u306e\u524d\u306b\u300c&lt;T&gt;\u300d\u53e5\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3061\u3089\u3082\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:java decode:true \">public class Main {\r\n \r\n    public static void main(String[] args) {\r\n \r\n        String str = getT(\"Hello\");\r\n        System.out.println(str);\r\n \r\n        Integer i = getT(1);\r\n        System.out.println(i);\r\n    }\r\n \r\n    private static &lt;T&gt; T getT(T t){\r\n        return t;\r\n    }\r\n}<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">Hello\r\n1<\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306fgetT\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u3068\u623b\u308a\u5024\u306bT\u578b\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30af\u30e9\u30b9\u3067\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3068\u540c\u69d8\u306b\u3001getT\u30e1\u30bd\u30c3\u30c9\u3092\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u3053\u3053\u3067\u306f\u3001\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306b\u3064\u3044\u3066\u30af\u30e9\u30b9\u3084\u30e1\u30bd\u30c3\u30c9\u3067\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>Integer\u578b\u3084String\u578b\u306e\u3088\u3046\u306b\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u3067\u540c\u3058\u3088\u3046\u306a\u51e6\u7406\u3092\u3057\u305f\u3044\u5834\u5408\u306b\u30c7\u30fc\u30bf\u578b\u6bce\u306b\u305d\u308c\u305e\u308c\u51e6\u7406\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u5b9f\u884c\u6642\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u5371\u967a\u3082\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u306e\u3067\u3001\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u3053\u306e\u8a18\u4e8b\u3092\u4f55\u5ea6\u3082\u53c2\u8003\u306b\u3057\u3066\u4e0b\u3055\u3044\u306d\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>List&lt;\u30c7\u30fc\u30bf\u578b&gt;\u306a\u3069\u306f\u898b\u304b\u3051\u308b\u3053\u3068\u3082\u591a\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002 \u30c7\u30fc\u30bf\u578b\u306b\u306fInteger\u578b\u3084String\u578b\u306a\u3069\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3001\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u3067\u3082\u540c\u3058\u3088\u3046\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u3066\u4fbf\u5229\u3067\u3059\u3002 \u3053\u306e\u6a5f\u80fd\u3092\u30b8\u30a7\u30cd [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":33619,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[2344],"tags":[67],"class_list":["post-22699","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-study","tag-java"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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