{"id":15769,"date":"2024-03-16T02:11:59","date_gmt":"2024-03-15T17:11:59","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e5%8f%8d%e5%b0%84%e3%81%ab%e3%82%88%e3%81%a3%e3%81%a6private%e3%81%aa%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95\/"},"modified":"2025-08-06T04:05:16","modified_gmt":"2025-08-05T19:05:16","slug":"java%e3%81%ae%e5%8f%8d%e5%b0%84%e3%81%ab%e3%82%88%e3%81%a3%e3%81%a6private%e3%81%aa%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e5%8f%8d%e5%b0%84%e3%81%ab%e3%82%88%e3%81%a3%e3%81%a6private%e3%81%aa%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95\/","title":{"rendered":"Java\u306e\u53cd\u5c04\u306b\u3088\u3063\u3066private\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>Java\u306e\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u6cd5\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>Class\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u53d6\u5f97\uff1a\u307e\u305a\u3001\u64cd\u4f5c\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u30af\u30e9\u30b9\u306eClass\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306bClass.forName()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300cExample\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30af\u30e9\u30b9\u306e\u79c1\u6709\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>Class&lt;?&gt; clazz = Class.forName(\"Example\");\r\n<\/code><\/pre>\n<ol>\n<li>Method\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u307e\u3059\uff1a\u305d\u306e\u5f8c\u3001getDeclaredMethod\uff08\uff09\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306eMethod\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u306f2\u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5fc5\u8981\u3067\u3059\uff1a\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d\u3068\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30bf\u30a4\u30d7\u3002\u4f8b\u3048\u3070\u3001\u300cprivateMethod\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u3001\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>Method method = clazz.getDeclaredMethod(\"privateMethod\", parameterTypes);\r\n<\/code><\/pre>\n<ol>\n<li>\u8a2d\u5b9a\u65b9\u6cd5\u7684\u53ef\u5b58\u53d6\u6027\uff1a\u7531\u65bc\u79c1\u6709\u65b9\u6cd5\u9810\u8a2d\u662f\u4e0d\u53ef\u5b58\u53d6\u7684\uff0c\u9700\u8981\u900f\u904esetAccessible()\u65b9\u6cd5\u5c07\u5176\u8a2d\u5b9a\u70ba\u53ef\u5b58\u53d6\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7a0b\u5f0f\u78bc\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>method.setAccessible(true);\r\n<\/code><\/pre>\n<ol>\n<li>\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\uff1a\u6700\u5f8c\u306b\u3001invoke\uff08\uff09\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>Object result = method.invoke(object, args);\r\n<\/code><\/pre>\n<p>object\u306f\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u542b\u3080\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3042\u308a\u3001args\u306f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3055\u308c\u308b\u5f15\u6570\u914d\u5217\u3067\u3059\u3002<\/p>\n<p>\u79c1\u6709\u30e1\u30bd\u30c3\u30c9\u3078\u306e\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u306f\u3001\u60c5\u5831\u96a0\u853d\u306e\u539f\u5247\u306b\u9055\u53cd\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u614e\u91cd\u3067\u3042\u308a\u3001\u5145\u5206\u306a\u7406\u7531\u3068\u9069\u5207\u306a\u30b7\u30ca\u30ea\u30aa\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u306e\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u6cd5\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 Class\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u53d6\u5f97\uff1a\u307e\u305a\u3001\u64cd\u4f5c\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u30af\u30e9\u30b9\u306eClass\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306bClas [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-15769","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u306e\u53cd\u5c04\u306b\u3088\u3063\u3066private\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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content=\"Java\u306e\u53cd\u5c04\u306b\u3088\u3063\u3066private\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"Java\u306e\u53cd\u5c04\u306b\u3088\u3063\u3066private\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306e\u53cd\u5c04\u306b\u3088\u3063\u3066private\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4f55\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" 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