{"id":26,"date":"2017-04-19T17:33:52","date_gmt":"2017-04-19T09:33:52","guid":{"rendered":"http:\/\/www.myway5.com\/?p=26"},"modified":"2017-08-17T13:17:35","modified_gmt":"2017-08-17T05:17:35","slug":"jvm-study-lesson-5","status":"publish","type":"post","link":"https:\/\/www.myway5.com\/index.php\/2017\/04\/19\/jvm-study-lesson-5\/","title":{"rendered":"Java\u865a\u62df\u673a\u5b66\u4e60\u8bb0\u5f55(\u4e94)-\u5783\u573e\u6536\u96c6\u5668"},"content":{"rendered":"<h2>\u4e00\u3001\u524d\u8a00<\/h2>\n<p>\u4f17\u6240\u5468\u77e5\uff0cJava\u4e0eC\u7684\u4e00\u4e2a\u663e\u8457\u7684\u533a\u522b\u5728\u4e8ec\u9700\u8981\u624b\u52a8\u7684\u53bb\u7ba1\u7406\u5185\u5b58\uff0c\u800cJava\u51e0\u4e4e\u4e0d\u9700\u8981\u53bb\u505a\u8fd9\u6837\u7684\u5904\u7406\u3002\u539f\u56e0\u5728\u4e8eJava\u7684\u865a\u62df\u673a\u6709\u4e00\u5957\u81ea\u5df1\u7684\u5185\u5b58\u56de\u6536\u7b56\u7565\u3002<\/p>\n<p>\u5728Java\u865a\u62df\u673a\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u865a\u62df\u673a\u6808\u3001\u7a0b\u5e8f\u8ba1\u6570\u5668\u3001\u672c\u5730\u65b9\u6cd5\u6808\u968f\u7740\u7ebf\u7a0b\u7684\u751f\u547d\u5468\u671f\u7684\u53d8\u5316\u800c\u53d8\u5316\uff0c\u56e0\u6b64\u8fd9\u4e00\u90e8\u5206\u7684\u5185\u5b58\u662f\u4e0d\u9700\u8981\u989d\u5916\u7684\u53bb\u56de\u6536\u3002\u4f46\u662f\u5bf9\u4e8eJava\u5806\u6765\u8bf4\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u5bf9\u8c61\u7684\u521b\u5efa\uff08\u8fd9\u91cc\u4e4b\u6240\u4ee5\u8bf4\u51e0\u4e4e\uff0c\u662f\u56e0\u4e3a\u968f\u7740JIT\u7f16\u8bd1\u5668\u3001\u5bf9\u8c61\u9003\u9038\u5206\u6790\u548c\u6808\u4e0a\u5206\u914d\u7684\u6280\u672f\u53d1\u5c55\uff0c\u90e8\u5206\u5bf9\u8c61\u4e0d\u9700\u8981\u5728\u5806\u4e2d\u5206\u914d\u5185\u5b58\uff09\u90fd\u662f\u5728\u5806\u4e2d\u8fdb\u884c\uff0c\u5982\u679c\u4e0d\u4f5c\u5185\u5b58\u56de\u6536\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u5360\u6ee1\u5185\u5b58\uff0c\u90a3\u4e48\u600e\u4e48\u6837\u53bb\u5206\u6790\u5f97\u5230\u90a3\u4e9b\u5bf9\u8c61\u5df2\u7ecf\u4e0d\u518d\u9700\u8981\u5219\u662f\u95ee\u9898\u7684\u5173\u952e\u3002<strong>\u6240\u4ee5\uff0c\u8981\u5b9e\u73b0\u5783\u573e\u56de\u6536\uff0c\u5148\u8981\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u5df2\u6b7b\uff0c\u7136\u540e\u518d\u5bf9\u5df2\u6b7b\u5bf9\u8c61\u6267\u884c\u56de\u6536\u7b97\u6cd5\u3002<\/strong>\u4e0b\u9762\u8bb0\u5f55\u51e0\u79cd\u5e38\u89c1\u7684\u5728\u5783\u573e\u56de\u6536\u4e2d\u7684\u7b97\u6cd5<\/p>\n<h2>\u4e8c\u3001\u5bf9\u8c61\u662f\u5426\u5df2\u6b7b\u7684\u5224\u5b9a\u2014\u2014\u5f15\u7528\u8ba1\u6570\u6cd5<\/h2>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u539f\u7406\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u8bf4\u6bcf\u4e2a\u5bf9\u8c61\u589e\u52a0\u4e00\u4e2a\u5f15\u7528\u5c31\u7ed9\u4ed6\u7684\u8ba1\u6570\u5668\u52a01\uff0c\u5f53\u5f15\u7528\u5931\u6548\u65f6(\u8fd9\u91cc\u7684\u5f15\u7528\u5931\u6548\uff0c\u6211\u89c9\u5f97\u662f\u8bf4\u5f53\u7a0b\u5e8f\u7684\u6267\u884c\u79bb\u5f00\u4e86\u5bf9\u8c61\u7684\u4f5c\u7528\u57df\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5f15\u7528\u5c31\u7b97\u662f\u5931\u6548\u4e86)\uff0c\u8ba1\u6570\u5668\u5c31\u51cf\u4e00\u3002\u5f53\u8ba1\u6570\u5668\u518d\u6b21\u53d8\u4e3a0\u65f6\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u5c31\u5224\u5b9a\u5b83\u5df2\u7ecf\u53ef\u4ee5\u56de\u6536\u4e86\u3002<\/p>\n<p>\u4f46\u662f\u8fd9\u79cd\u65b9\u6cd5\u4e5f\u6709\u4e00\u4e2a\u4e25\u91cd\u7684\u95ee\u9898\uff0c\u5f53ObjectA.instance 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href=\"http:\/\/blog.csdn.net\/derrantcm\/article\/details\/44409835\" target=\"_blank\">\u56fe\u7247\u5f15\u7528\u5730\u5740<\/a>\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2017\/08\/%E5%8F%AF%E8%BE%BE%E6%80%A7%E5%88%86%E6%9E%90.png\" alt=\"\u53ef\u8fbe\u6027\u5206\u6790\"><\/p>\n<p>\u5728\u8fd9\u91cc\uff0c\u867d\u7136object 8,object 9,object 10,object 11,object 12\u90fd\u4e92\u76f8\u6301\u6709\u5f15\u7528\uff0c\u4f46\u662f\u56e0\u4e3a\u4eceGC Roots\u4e2d\u65e0\u6cd5\u5230\u8fbe\uff0c\u6240\u4ee5\u53ef\u4ee5\u5224\u5b9a\u4e3a\u53ef\u56de\u6536\u5bf9\u8c61\u3002\u5f88\u597d\u7684\u89e3\u51b3\u4e86\u5f15\u7528\u8ba1\u6570\u6cd5\u7684\u5f0a\u7aef\u3002<br \/>\n  \u5728Java\u4e2d\uff0c\u53ef\u4f5c\u4e3aGC Roots\u7684\u5bf9\u8c61\u5305\u62ec\uff1a<br \/>\n  \u865a\u62df\u673a\u6808\uff08\u6808\u5e27\u4e2d\u7684\u672c\u5730\u53d8\u91cf\u8868)\u4e2d\u7684\u5f15\u7528\u5bf9\u8c61<br \/>\n  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Promotion)\u3002<\/p>\n<h2>\u516d\u3001\u5783\u573e\u56de\u6536\u7b97\u6cd5\u2014\u2014\u6807\u8bb0-\u6574\u7406\u6cd5<\/h2>\n<p>\u4e0a\u9762\u7684\u590d\u5236\u7b97\u6cd5\u5f88\u660e\u663e\u4e0d\u9002\u7528\u4e8e\u5e74\u8001\u4ee3\uff0c\u56e0\u4e3a\u5e74\u8001\u4ee3\u4e2d\u7684\u5bf9\u8c61\u7279\u70b9\u662f\u5b58\u6d3b\u7387\u5927\u3002\u6807\u8bb0-\u6574\u7406\u7b97\u6cd5\u4e0e\u6807\u8bb0-\u6e05\u9664\u7b97\u6cd5\u7c7b\u4f3c\uff0c\u4f46\u662f\u5b83\u4e0d\u662f\u76f4\u63a5\u5bf9\u5bf9\u8c61\u8fdb\u884c\u6e05\u9664\uff0c\u800c\u662f\u5c06\u5b58\u6d3b\u7684\u5bf9\u8c61\u5411\u4e00\u7aef\u79fb\u52a8\uff0c\u7136\u540e\u76f4\u63a5\u6e05\u7406\u6389\u7aef\u8fb9\u754c\u610f\u5916\u7684\u5185\u5b58\u3002\u5f15\u7528\u4e00\u5f20\u6765\u81ea\u7f51\u7edc\u4e0a\u7684\u56fe\u7247<a href=\"https:\/\/my.oschina.net\/winHerson\/blog\/114391\" target=\"_blank\">\u56fe\u7247\u5f15\u7528\u5730\u5740<\/a><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2017\/08\/%E5%A4%8D%E5%88%B6%E6%B8%85%E7%90%86-1.jpg\" alt=\"\u6b64\u5904\u8f93\u5165\u56fe\u7247\u7684\u63cf\u8ff0\"><\/p>\n<h2>\u4e03\u3001\u6269\u5c55\u4e00\u4e0b\u5f15\u7528\u7684\u77e5\u8bc6<\/h2>\n<p>\u5728\u56db\u3001\u4e94\u7684\u5224\u5b9a\u5bf9\u8c61\u662f\u5426\u5df2\u6b7b\u4e2d\uff0c\u5747\u6d89\u53ca\u5230\u4e86\u5f15\u7528\u3002\u5728\u4e0a\u9762\u7684\u8868\u8ff0\u4e2d\uff0c\u4f3c\u4e4e\u53ea\u6709\u5f15\u7528\u548c\u6b7b\u4ea1\u4e24\u79cd\u72b6\u6001\u3002\u4f46\u662f\u4e8b\u5b9e\u4e0a\uff0cJava\u89c4\u5b9a\u4e86\u56db\u79cd\u5f15\u7528\u72b6\u6001\u6765\u5e2e\u52a9Java\u7a0b\u5e8f\u83b7\u5f97\u66f4\u597d\u7684\u6027\u80fd\u3002\u600e\u4e48\u53bb\u7406\u89e3\u8fd9\u4e2a\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u5f53Java\u865a\u62df\u673a\u7684\u5185\u5b58\u8db3\u591f\u65f6\uff0c\u6709\u7684\u5bf9\u8c61\u867d\u7136\u5df2\u7ecf\u4e0d\u9700\u8981\u4e86\uff0c\u4f46\u662f\u5b8c\u5168\u6ca1\u6709\u5fc5\u8981\u5c06\u5b83\u4e22\u5f03\uff0c\u53ea\u6709\u5728\u8fdb\u884c\u5783\u573e\u56de\u6536\u540e\u5185\u5b58\u4ecd\u7136\u4e0d\u8db3\u65f6\u624d\u5c06\u8fd9\u4e9b\u5bf9\u8c61\u56de\u6536\u3002\u8fd9\u6837\u5c31\u589e\u52a0\u4e86\u8fd9\u4e9b\u5bf9\u8c61\u7684\u590d\u7528\u3002\u514d\u53bb\u4e86\u4e0b\u4e00\u6b21\u4f7f\u7528\u8fd9\u4e9b\u5bf9\u8c61\u53c8\u8981\u91cd\u65b0\u521b\u5efa\u7684\u95ee\u9898\u3002\u5f88\u591a\u7cfb\u7edf\u7684\u7f13\u5b58\u529f\u80fd\u90fd\u7b26\u5408\u8fd9\u6837\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n<p>\u5728JDK1.2\u540e\uff0cJava\u6269\u5145\u4e86\u5f15\u7528\u7684\u6982\u5ff5\uff0c\u5206\u4e3a\u5f3a\u5f15\u7528(Strong Reference)\u3001\u8f6f\u5f15\u7528(Soft Reference)\u3001\u5f31\u5f15\u7528(Weak Reference)\u548c\u865a\u5f15\u7528(Phantom Reference)\u3002<\/p>\n<p><strong>a.\u5f3a\u5f15\u7528<\/strong><br \/>\nObject obj = new Object()\u8fd9\u79cd\u5c31\u662f\u5f3a\u5f15\u7528\uff0c\u53ea\u8981\u8fd9\u4e2a\u5f15\u7528\u5b58\u5728\uff0c\u65e0\u8bba\u5982\u4f55JVM\u90fd\u4e0d\u4f1a\u56de\u6536\u8fd9\u4e9b\u5bf9\u8c61<\/p>\n<p><strong>b.\u8f6f\u5f15\u7528<\/strong><br \/>\n\u8f6f\u5f15\u7528\u7528\u6765\u63cf\u8ff0\u4e00\u4e9b\u8fd8\u6709\u7528\u4f46\u5e76\u975e\u5fc5\u9700\u7684\u5bf9\u8c61\u3002\u7528\u8f6f\u5f15\u7528\u7684\u5bf9\u8c61\u5728\u7cfb\u7edf\u8fdb\u884c\u8fc7\u5783\u573e\u56de\u6536\u4ecd\u7136\u5185\u5b58\u4e0d\u8db3\u65f6\u624d\u4f1a\u8fdb\u884c\u56de\u6536\u3002\u5728JDK1.2\u4e4b\u540e\uff0c\u63d0\u4f9b\u4e86SoftReference\u7c7b\u6765\u5b9e\u73b0\u8f6f\u5f15\u7528\u3002<\/p>\n<p><strong>c.\u5f31\u5f15\u7528<\/strong><br \/>\n\u5f31\u5f15\u7528\u4e5f\u662f\u7528\u6765\u63cf\u8ff0\u975e\u5fc5\u9700\u7684\u5bf9\u8c61\uff0c\u4f46\u662f\u5f3a\u5ea6\u6bd4\u8f6f\u5f15\u7528\u8fd8\u5f31\u4e00\u70b9\u3002\u5728\u4e0b\u4e00\u6b21GC\u65f6\u5fc5\u5b9a\u4f1a\u56de\u6536\u3002<\/p>\n<p><strong>d.\u865a\u5f15\u7528<\/strong><br \/>\n\u865a\u5f15\u7528\u5bf9\u5bf9\u8c61\u7684\u751f\u5b58\u65f6\u95f4\u6784\u4e0d\u6210\u5f71\u54cd\uff0c\u5c31\u548c\u6ca1\u6709\u5f15\u7528\u4e0e\u4e4b\u5173\u8054\u4e00\u6837\uff0c\u6240\u4ee5\u4efb\u4f55\u65f6\u5019\u7684GC\u90fd\u4f1a\u5c06\u5176\u56de\u6536\u3002\u5bf9\u4e00\u4e2a\u5bf9\u8c61\u8bbe\u7f6e\u865a\u5f15\u7528\u7684\u552f\u4e00\u76ee\u7684\u5c31\u662f\u8fd9\u4e2a\u5bf9\u8c61\u88ab\u56de\u6536\u65f6\u4f1a\u6536\u5230\u4e00\u4e2a\u7cfb\u7edf\u901a\u77e5\u3002\u5728JDK1.2\u4ee5\u540e\uff0c\u63d0\u4f9b\u4e86PhantomReference\u7c7b\u6765\u5b9e\u73b0\u865a\u5f15\u7528\u3002<\/p>\n<p>\u7528\u4ee3\u7801\u6765\u68c0\u9a8c\u4e00\u4e0b\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a\u5f15\u7528\u3002<\/p>\n<pre class=\"line-numbers prism-highlight\" data-start=\"1\"><code class=\"language-java\">package test;\n\nimport java.lang.ref.PhantomReference;\nimport java.lang.ref.Reference;\nimport java.lang.ref.ReferenceQueue;\nimport java.lang.ref.SoftReference;\nimport java.lang.ref.WeakReference;\nimport java.lang.reflect.Field;\n\npublic class TestReference {\n    public static boolean run = true;\n    public static void main(String[] args){\n        WeakReference&lt;String&gt; weakReference = new WeakReference&lt;String&gt;(new String(\"weak Reference\"));\n        SoftReference&lt;String&gt; softReference = new SoftReference&lt;String&gt;(new String(\"soft Reference\"));\n        final ReferenceQueue&lt;String&gt; queue = new ReferenceQueue&lt;String&gt;();\n        new Thread(new Runnable() {\n\n            @Override\n            public void run() {\n                while(run){\n                    Object object = queue.poll();\n                    if(object != null){\n                        try {\n                            Field referent = Reference.class.getDeclaredField(\"referent\");\n                            referent.setAccessible(true);\n                            Object result = referent.get(object);\n                            System.out.println(\"\u5373\u5c06\u56de\u6536\"+result.getClass()+(String)result);\n                        } catch (NoSuchFieldException | SecurityException e) {\n                            \/\/ TODO Auto-generated catch block\n                            e.printStackTrace();\n                        } catch (IllegalArgumentException e) {\n                            \/\/ TODO Auto-generated catch block\n                            e.printStackTrace();\n                        } catch (IllegalAccessException e) {\n                            \/\/ TODO Auto-generated catch block\n                            e.printStackTrace();\n                        }\n                    }\n                }\n\n            }\n        }).start();\n        PhantomReference&lt;String&gt; phantomReference = new PhantomReference&lt;String&gt;(new String(\"phantom Reference\"), queue);\n\n        System.out.println(weakReference.get());\n        System.out.println(softReference.get());\n        System.out.println(phantomReference.get());\n        System.out.println(\"*****************\u4e0b\u9762\u5f00\u59cbGC******************\");\n        System.gc();        \/\/System.gc\u53ea\u662f\u5efa\u8bae\u7cfb\u7edf\u8fdb\u884c\u5783\u573e\u56de\u6536\uff0c\u5e76\u4e0d\u662f\u7acb\u523b\u6267\u884c\n        System.out.println(weakReference.get());\n        System.out.println(softReference.get());\n        System.out.println(phantomReference.get());\n    }\n}\n\n<\/code><\/pre>\n<p>\u4e0a\u9762\u8fd9\u6bb5\u4ee3\u7801\u7684\u8f93\u51fa\u4e3a<\/p>\n<blockquote><p>\n  weak Reference<br \/>\n  soft Reference<br \/>\n  null<br \/>\n  *****************\u4e0b\u9762\u5f00\u59cbGC******************<br \/>\n  null<br \/>\n  soft Reference<br \/>\n  null<br \/>\n  \u5373\u5c06\u56de\u6536class java.lang.Stringphantom Reference\n<\/p><\/blockquote>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u8f6f\u5f15\u7528\u5728gc\u4e4b\u540e\u4ecd\u7136\u662f\u5b58\u5728\u7684\uff0c\u800c\u5f31\u5f15\u7528gc\u4e4b\u540e\u53d8\u6210null\u4e86\uff0c\u865a\u5f15\u7528\u4e00\u76f4\u4e3anull\u3002\u5e76\u4e14\u6211\u4eec\u901a\u8fc7\u65b0\u5f00\u4e00\u4e2a\u7ebf\u7a0b\u6765\u68c0\u6d4b\u865a\u5f15\u7528\u88ab\u56de\u6536\u7684\u901a\u77e5\u3002\u6240\u4ee5\u6b63\u786e\u7684\u4f7f\u7528soft Reference\u548cweak Reference\u53ef\u4ee5\u5b9e\u73b0\u7f13\u5b58\u548c\u9632\u6b62\u5185\u5b58\u6cc4\u9732\uff0c\u800c\u865a\u5f15\u7528\u4e00\u822c\u7528\u6765\u5b9e\u73b0\u7ec6\u7c92\u5ea6\u7684\u5185\u5b58\u63a7\u5236\u3002\u6bd4\u5982\u4e0b\u9762\u4ee3\u7801\u5b9e\u73b0\u4e00\u4e2a\u7f13\u5b58\u3002\u7a0b\u5e8f\u5728\u786e\u8ba4\u539f\u6765\u7684\u5bf9\u8c61\u8981\u88ab\u56de\u6536\u4e4b\u540e\uff0c\u624d\u7533\u8bf7\u5185\u5b58\u521b\u5efa\u65b0\u7684\u7f13\u5b58\u3002<a href=\"http:\/\/blog.csdn.net\/imzoer\/article\/details\/8044900\" target=\"_blank\">Java\u5e7d\u7075\u5f15\u7528\u7684\u4f5c\u7528<\/a><\/p>\n<h2>\u516b\u3001\u603b\u7ed3<\/h2>\n<p>\u53ef\u4ee5\u770b\u51fa\uff0c\u4e0d\u8bba\u662f\u5bf9java\u5806\u4e2d\u5185\u5b58\u7a7a\u95f4\u8fdb\u884c\u5206\u4ee3\uff0c\u8fd8\u662f\u5bf9\u5f15\u7528\u8fdb\u884c\u56db\u79cd\u7c7b\u578b\u7684\u5212\u5206\uff0c\u90fd\u662f\u4e3a\u4e86\u89e3\u51b3\u5728java\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u56e0\u4e3a\u5b58\u5728\u5404\u79cd\u5404\u6837\u7684\u5bf9\u8c61\uff0c\u5355\u4e00\u7684\u5783\u573e\u56de\u6536\u7b97\u6cd5\u6ca1\u6709\u529e\u6cd5\u9ad8\u6548\u7684\u8fdb\u884c\u3002\u4e8b\u5b9e\u4e0a\u5783\u573e\u56de\u6536\u7b97\u6cd5\u518d\u4e0d\u65ad\u7684\u53d8\u5316\uff0c\u6bcf\u4e00\u79cd\u5f53\u524d\u5b58\u5728\u7684\u5783\u573e\u56de\u6536\u7b97\u6cd5\u90fd\u6709\u5b83\u9002\u5e94\u7684\u8fd0\u884c\u73af\u5883\u3002\u56e0\u6b64\u5728\u4ec0\u4e48\u65f6\u5019\u4f7f\u7528\u4ec0\u4e48\u6837\u7684\u5783\u573e\u56de\u6536\u7b97\u6cd5\uff0c\u5bf9\u4e8e\u7a0b\u5e8f\u7684\u6027\u80fd\u6765\u8bf4\u4e5f\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u524d\u8a00 \u4f17\u6240\u5468\u77e5\uff0cJava\u4e0eC\u7684\u4e00\u4e2a\u663e\u8457\u7684\u533a\u522b\u5728\u4e8ec\u9700\u8981\u624b\u52a8\u7684\u53bb\u7ba1\u7406\u5185\u5b58\uff0c\u800cJava\u51e0\u4e4e\u4e0d\u9700\u8981\u53bb\u505a\u8fd9\u6837\u7684\u5904\u7406 &hellip; <a href=\"https:\/\/www.myway5.com\/index.php\/2017\/04\/19\/jvm-study-lesson-5\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">Java\u865a\u62df\u673a\u5b66\u4e60\u8bb0\u5f55(\u4e94)-\u5783\u573e\u6536\u96c6\u5668<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-26","post","type-post","status-publish","format-standard","hentry","category-jvm"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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\u7ee7\u7eed\u9605\u8bfbJava\u865a\u62df\u673a\u5b66\u4e60\u8bb0\u5f55(\u4e94)-\u5783\u573e\u6536\u96c6\u5668\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.myway5.com\/index.php\/2017\/04\/19\/jvm-study-lesson-5\/\" \/>\n<meta property=\"og:site_name\" content=\"\u4e00\u53ea\u5b89\u9759\u7684\u732b\" \/>\n<meta property=\"article:published_time\" content=\"2017-04-19T09:33:52+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-08-17T05:17:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2017\/08\/%E5%8F%AF%E8%BE%BE%E6%80%A7%E5%88%86%E6%9E%90.png\" \/>\n<meta name=\"author\" content=\"jiangpengfei\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"jiangpengfei\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" 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