{"id":154,"date":"2021-12-22T22:10:12","date_gmt":"2021-12-22T14:10:12","guid":{"rendered":"https:\/\/blog.xiaotao2333.top:344\/?p=154"},"modified":"2021-12-23T23:09:54","modified_gmt":"2021-12-23T15:09:54","slug":"%e7%8e%a9%e8%bd%acjava%ef%bc%9a%e6%95%b4%e6%95%b011%e5%b1%85%e7%84%b6%e5%8f%af%e4%bb%a5%e4%b8%8d%e7%ad%89%e4%ba%8e2%ef%bc%81%ef%bc%9f%ef%bc%8c%e5%8e%9f%e6%9d%a5%e6%b6%89%e5%8f%8a%e5%88%b0%e8%bf%99","status":"publish","type":"post","link":"https:\/\/blog.xiaotao2333.top:344\/?p=154","title":{"rendered":"\u73a9\u8f6cJava\uff1a\u6574\u65701+1\u5c45\u7136\u53ef\u4ee5\u4e0d\u7b49\u4e8e2\uff01\uff1f\u6d89\u53ca\u5230\u8fd9\u4e9b\u77e5\u8bc6\u70b9"},"content":{"rendered":"<h1>\u73a9\u8f6cJava\uff1a\u6574\u65701+1\u5c45\u7136\u53ef\u4ee5\u4e0d\u7b49\u4e8e2\uff1f<\/h1>\n<hr \/>\n<h2>\u6765\u70b9\u795e\u5947\u73b0\u8c61<\/h2>\n<p>\u4e00\u5f00\u59cb\u4f60\u8be5\u4e0d\u4f1a\u4ee5\u4e3a\u662f\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u5427\uff0cNo No No\uff0c<img src=\"\/wp-content\/uploads\/2021\/12\/\u6ed1\u7a3d\u8349\u4e1b.jpg\" alt=\"\" \/>\u5c31\u662f<strong>\u6574\u6570<\/strong>\u76841+1\u8fd0\u7b97\u7ed3\u679c\u4e0d\u4e3a2\uff0c\u5148\u6765\u770b\u6bb5\u4ee3\u7801\u7684\u6267\u884c\u6f14\u793a\uff1a<br \/>\n<img src=\"\/wp-content\/uploads\/2021\/12\/\u4e00\u52a0\u4e00\u4e0d\u7b49\u4e8e\u4e8c.gif\" alt=\"\" \/><\/p>\n<h2>\u5b8c\u6574\u4ee3\u7801\u63ed\u79d8<\/h2>\n<p>\u5982\u679c\u4f60\u590d\u5236\u4e86\u4e0a\u9762GIF\u4e2d\u7684\u4ee3\u7801\u5230\u81ea\u5df1\u7684\u73af\u5883\u4e0b\u8fd0\u884c\uff0c\u4f60\u4f1a\u53d1\u73b0\u7ed3\u679c\u5c31\u662f2\uff0c\u8fd9\u65f6\u5019\u8bfb\u8005\u80af\u5b9a\u5c31\u4f1a\u9a82\u6211\uff0c\u8bf4\u4e0a\u9762\u7684\u52a8\u56fe\u662f\u5047\u7684\uff0c\u662f\u5f55\u5c4f\u7684\u7279\u6280\uff0c\u6839\u672c\u5c31\u6ca1\u6709\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n<p>\u6ca1\u9519\uff0c\u786e\u5b9e\u52a0\u4e86duang~\\~\\~\u7684\u7279\u6280\uff0c\u4e0d\u8fc7\u6ca1\u6709\u5728\u5f55\u5c4f\u6216GIF\u4e0a\u505a\u624b\u811a\uff0c\u800c\u662f\u6211\u6ca1\u6709\u5f55\u4e0b\u5b8c\u6574\u7684\u4ee3\u7801\u3002\u4e0b\u9762\u5c31\u5c55\u793a\u4e00\u4e0b\u5b8c\u6574\u7684\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">public class TestIntegerMagic {\n\n    public static void main(String[] args) {\n        Integer a = 1;\n        System.out.println(a + 1);\n    }\n\n    \/\/ \u523b\u610f\u6ca1\u6709\u5c55\u793a\u7684\u4ee3\u7801\n    static {\n        Integer a = 1;\n        try {\n            Field value = a.getClass().getDeclaredField(&quot;value&quot;);\n            value.setAccessible(true);\n            value.set(a, 114513);\n        } catch (NoSuchFieldException | IllegalAccessException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n<p>\u5982\u679c\u4f60\u4e86\u89e3\u4e0b\u9762\u7684\u673a\u5236\uff0c\u770b\u5230\u8fd9\u6bb5\u4ee3\u7801\u7684\u65f6\u5019\u4f30\u8ba1\u5c31\u4f1a\u5fc3\u4e00\u7b11\uff0c\u79d2\u61c2\u4e86\uff1a<\/p>\n<ul>\n<li>\u57fa\u672c\u7c7b\u578b\u5305\u88c5\u7c7b\u7684\u81ea\u52a8\u88c5\u7bb1\/\u62c6\u7bb1<\/li>\n<li>Integer \u7f13\u5b58\u673a\u5236<\/li>\n<li>Java\u53cd\u5c04\u673a\u5236<\/li>\n<li>JVM\u7c7b\u52a0\u8f7d\u673a\u5236<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u6211\u5c31\u7ed3\u5408\u8fd9\u4e2a\u4e00\u52a0\u4e00\u7684\u4f8b\u5b50\uff0c\u9010\u4e2a\u8bb2\u89e3\u3002<\/p>\n<h2>\u539f\u7406\u8bb2\u89e3<\/h2>\n<h3>\u81ea\u52a8\u88c5\u7bb1\u4e0e\u62c6\u7bb1<\/h3>\n<p>\u5982\u679c\u4e86\u89e3\u5e76\u4e14\u4f7f\u7528\u8fc7Java\u8fdb\u884c\u9879\u76ee\u5f00\u53d1\uff0c99%\u4f1a\u6709\u610f\u6216\u65e0\u610f\u4e2d\u5229\u7528\u5230\u8fd9\u4e2a\u673a\u5236\u3002\u5173\u4e8e\u8fd9\u4e2a\u673a\u5236\uff0c\u7f51\u4e0a\u7684\u53c2\u8003\u8d44\u6599\u975e\u5e38\u975e\u5e38\u591a\uff0c\u6211\u8fd9\u91cc\u5c31\u6211\u7684\u7406\u89e3\u6765\u8bb2\u89e3\u4e00\u4e0b\uff1a<\/p>\n<p>\u4e0a\u9762\u7684\u6837\u4f8b\u4ee3\u7801\u4e2d\uff0c\u51fa\u73b0\u4e86\u8fd9\u79cd\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">Integer a = 1;<\/code><\/pre>\n<p>\u53ef\u5b9e\u9645\u4e0a\u5728\u88ab\u7f16\u8bd1\u6210class\u6587\u4ef6\u540e\uff0c\u4f1a\u88ab\u5148\u5904\u7406\u6210<code>Integer a = Integer.valueOf(1)<\/code>\u518d\u8fdb\u884c\u7f16\u8bd1\uff0c\u6211\u4eec\u53ef\u4ee5\u89c2\u5bdf\u6e90\u4ee3\u7801\u7f16\u8bd1\u540e\u7684\u5b57\u8282\u7801\u6765\u9a8c\u8bc1\u8fd9\u4e2a\u8fc7\u7a0b\u3002<br \/>\n\u4ee5\u4e0b\u662f\u4f7f\u7528IDEA\u67e5\u770b\u7684\u5b57\u8282\u7801\u4fe1\u606f\uff1a<\/p>\n<p><img src=\"\/wp-content\/uploads\/2021\/12\/\u5b57\u8282\u7801.jpg\" alt=\"\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u786e\u5b9e\u662f\u4f7f\u7528\u4e86<code>Integer<\/code>\u5bf9\u8c61\u7684<font color=\"red\"><strong>\u9759\u6001\u65b9\u6cd5<\/strong><\/font><code>valueOf<\/code>\u6765\u83b7\u53d6<code>Integer<\/code>\u7c7b\u5b9e\u4f8b\u5bf9\u8c61\u3002<\/p>\n<p>\u800c\u62c6\u7bb1\u5462\uff0c\u5219\u662f\u8c03\u7528\u4e86<code>Integer<\/code><font color=\"red\"><strong>\u5b9e\u4f8b\u65b9\u6cd5<\/strong><\/font>\u7684<code>intValue<\/code>\u65b9\u6cd5\uff0c\u4e0a\u9762\u7684\u5b57\u8282\u7801\u56fe\u7247\u4e2d\u4e5f\u6709\u51fa\u73b0\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u672c\u7bc7\u6587\u7ae0\u4f8b\u5b50\u4e2d\u6700\u7ec8\u7f16\u8bd1\u7684Java\u4ee3\u7801\u5e94\u8be5\u662f\u8fd9\u6837\u7684<\/p>\n<pre><code class=\"language-java\">\/\/ \u5176\u4ed6\u58f0\u660e\u7701\u7565\nInteger a = Integer.valueOf(1);\nSystem.out.println(a.intValue() + 1);<\/code><\/pre>\n<p>\u4e3a\u4ec0\u4e48\u8981\u63d0\u5230\u8fd9\u4e2a\u81ea\u52a8\u88c5\u7bb1\u7684\u673a\u5236\u5462\uff1f\u56e0\u4e3a\uff0c\u4f7f\u7528\u81ea\u52a8\u88c5\u7bb1\u6216valueOf\u65b9\u6cd5\uff0c\u5f80\u5f80\u4f1a\u6d89\u53ca\u5230\u53e6\u4e00\u4e2a\u673a\u5236\uff0cInteger\u7684\u7f13\u5b58\u673a\u5236<\/p>\n<h3>Integer\u7f13\u5b58\u673a\u5236<\/h3>\n<p>Integer\u7f13\u5b58\u673a\u5236\u662f\u6307Integer\u5728\u901a\u8fc7<code>valueOf<\/code>\u65b9\u6cd5\u83b7\u53d6\u5b9e\u4f8b\u65f6\uff0c\u76f4\u63a5\u83b7\u53d6\u5230\u5148\u524d\u65e9\u5c31\u5b9e\u4f8b\u5316\u597d\u7684\u5bf9\u8c61\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u5b9e\u4f8b\u5316\u521b\u5efa\u5bf9\u8c61\uff0c\u4ece\u800c\u5b9e\u73b0<strong>\u51cf\u8f7bGC\u538b\u529b\u548c\u63d0\u9ad8\u7a0b\u5e8f\u8fd0\u884c\u901f\u5ea6<\/strong>\u3002<\/p>\n<p>\u60f3\u8981\u7406\u89e3\u8fd9\u4e2a\u8fc7\u7a0b\u5230\u5e95\u53d1\u751f\u4e86\u4ec0\u4e48\uff0c\u6700\u597d\u7684\u65b9\u6cd5\u5c31\u662f\u9605\u8bfb<code>Integer.valueOf(int i)<\/code>\u7684\u6e90\u7801\uff0c\u8fd9\u4e2a\u6ca1\u6709\u6d89\u53ca\u5230\u4ec0\u4e48\u9ad8\u6df1\u7684\u8bbe\u8ba1\u6a21\u5f0f\u548c\u7b97\u6cd5\uff0c\u4ed4\u7ec6\u9605\u8bfb\u7684\u8bdd\u8fd8\u662f\u5f88\u597d\u7406\u89e3\u7684\u3002<\/p>\n<p>\u8fd9\u91cc\u6211\u76f4\u63a5\u8d34\u51fa\u8fd9\u6bb5\u4ee3\u7801\uff0c\u53ea\u67093\u884c\uff1a<\/p>\n<pre><code class=\"language-java\">public Integer {\n    \/\/ ...\u5176\u4ed6\u58f0\u660e\u7565...\n    public static Integer valueOf(int i) {\n        if (i &gt;= IntegerCache.low &amp;&amp; i &lt;= IntegerCache.high)\n            return IntegerCache.cache[i + (-IntegerCache.low)];\n        return new Integer(i);\n    }\n    \/\/ ...\u5176\u4ed6\u58f0\u660e\u7565...\n}<\/code><\/pre>\n<p>\u5f53\u4f20\u5165\u7684int\u503c\u5728[IntegerCache.low, IntegerCache.high]\u8fd9\u4e2a\u95ed\u533a\u95f4\u5185\uff0c\u5c31\u76f4\u63a5\u8fd4\u56de<code>IntegerCache.cache<\/code>\u8fd9\u4e2a\u6570\u7ec4\u4e2d\u5bf9\u5e94\u4e0b\u6807\u4e2d\u7684\u5143\u7d20\uff08\u5373Integer\u5bf9\u8c61\uff09<\/p>\n<p>\u8fd9\u65f6\u5019\u4f1a\u7ee7\u7eed\u629b\u51fa\u4e24\u4e2a\u95ee\u9898\uff1a<\/p>\n<ol>\n<li><code>IntegerCache.low<\/code>\u548c<code>IntegerCache.high<\/code>\u5206\u522b\u662f\u591a\u5c11\uff1f\u5982\u4f55\u6307\u5b9a\uff1f<\/li>\n<li><code>IntegerCache.cache<\/code>\u662f\u600e\u4e48\u521d\u59cb\u5316\u7684\uff1f<\/li>\n<\/ol>\n<p>\u7b54\u6848\u5c31\u5728Integer\u7684\u5185\u90e8\u7c7b<code>IntegerCache<\/code>\u4e2d\u53ef\u4ee5\u627e\u5230\u7b54\u6848\uff0c\u4ee3\u7801\u53ea\u6709\u800c\u4e09\u5341\u884c\uff0c\u4e0d\u591a\uff0c\u4e5f\u5f88\u5bb9\u6613\u7406\u89e3<br \/>\n<img src=\"\/wp-content\/uploads\/2021\/12\/IntegerCache.jpg\" alt=\"\" \/><\/p>\n<p>\u8fd9\u70b9\u4ee3\u7801\u5f88\u5bb9\u6613\u4e00\u773c\u5c31\u770b\u51fa\uff0clow\u9ed8\u8ba4\u662f-128\uff0chigh\u9ed8\u8ba4\u662f127\u3002<br \/>\nlow\u88ab\u56fa\u5b9a\u6b7b\u4e86\uff0c\u4f46high\u662f\u53ef\u4ee5\u914d\u7f6e\u7684\uff0c\u65b9\u6cd5\u5c31\u662f\u865a\u62df\u673a\u6dfb\u52a0\u53c2\u6570<code>java.lang.Integer.IntegerCache.high<\/code>\u8bbe\u7f6e\u3002<\/p>\n<p>\u540e\u9762\u5c31\u662f\u4e00\u4e2afor\u5faa\u73af\u6765\u9010\u4e2a\u9010\u4e2a\u5b9e\u4f8b\u5316\u5e76\u52a0\u5165\u5230\u6570\u7ec4\u4e2d\u4e86\u3002<\/p>\n<p>\u4ee5\u4e0a\u521d\u59cb\u5316\u8fc7\u7a0b\u662f\u5728Integer\u5185\u90e8\u7c7bIntegerCache\u7684static\u4ee3\u7801\u5757\uff08\u9759\u6001\u4ee3\u7801\u5757\uff09\u4e2d\u6267\u884c\uff0c\u800c\u8fd9\u6bb5\u7684\u4ee3\u7801\u6267\u884c\u65f6\u673a\u548cJVM\u7c7b\u52a0\u8f7d\u673a\u5236\u6709\u5173\uff0c\u7ee7\u7eed\u9605\u8bfb\uff0c\u4e0b\u9762\u6211\u4eec\u518d\u5355\u72ec\u8ba8\u8bba\u3002<\/p>\n<h3>Java\u53cd\u5c04\u673a\u5236<\/h3>\n<p>\u5728\u4e86\u89e3Java\u53cd\u5c04\u673a\u5236\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u63a2\u8ba8\u4e0bint\u7684\u5305\u88c5\u7c7bInteger\u662f\u5982\u4f55\u5305\u88c5int\u7684\u3002<\/p>\n<h4>Integer\u5305\u88c5\u539f\u7406<\/h4>\n<p>\u6211\u4eec\u53ef\u4ee5\u4ece\u83b7\u53d6\u6216\u521b\u5efaInteger\u7684\u65b9\u6cd5\u4e2d\u4e0b\u624b\uff0c\u7b80\u5355\u7ffb\u9605\u6e90\u4ee3\u7801\uff0c\u6700\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u5c31\u662f\u7528<code>new<\/code>\u5173\u952e\u5b57\u8c03\u7528\u6784\u9020\u65b9\u6cd5\u5b9e\u4f8b\u5316\u3002\u4ee5\u4e0b\u662fInteger\u7684\u6784\u9020\u65b9\u6cd5\u548cintValue()\u6e90\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">public Integer {\n    private final int value;\n    public Integer(int value) {\n        this.value = value;\n    }\n\n    public int intValue() {\n        return value;\n    }\n}<\/code><\/pre>\n<p>\u5229\u7528Java\u975e\u57fa\u672c\u7c7b\u578b\u4f20\u503c\u4e3a\u5f15\u7528\u7684\u7279\u6027\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u4f7f\u7528\u5bf9\u8c61\u6765\u5305\u88c5\u57fa\u672c\u6570\u636e\u7c7b\u578b\u3002<br \/>\nemmm\uff0c\u5e73\u5e73\u65e0\u5947\u7684\u6784\u9020\u65b9\u6cd5\u548cintValue()\uff0c\u50cf\u6781\u4e86\u6211\u4eec\u65e0\u8111\u751f\u6210\u7684\u6784\u9020\u65b9\u6cd5\u548cgetter\u65b9\u6cd5\u3002<\/p>\n<h4>\u53cd\u5c04\u767b\u573a<\/h4>\n<p>Integer\u7684\u5b57\u6bb5<code>value<\/code>\u4f7f\u7528\u4e86<code>private final<\/code>\u4fee\u9970\uff0c\u770b\u8d77\u6765\u597d\u50cf\u5f88\u7a33\u5f88\u5b89\u5168\u7684\u611f\u89c9\uff0c\u56e0\u4e3a\u5916\u90e8\u662f\u65e0\u6cd5\u76f4\u63a5\u83b7\u53d6\u548c\u4fee\u6539\u8fd9\u4e2a\u5c5e\u6027\u7684\u503c\u7684\uff0c\u800c\u4e14\u5373\u4f7f\u662f\u5185\u90e8\u4e5f\u4e0d\u5141\u8bb8\u8fd0\u884c\u65f6\u518d\u6b21\u4fee\u6539\u8fd9\u4e2a\u503c\u3002<\/p>\n<p>\u90a3\u4e48\u6709\u4ec0\u4e48\u529e\u6cd5\u6253\u7834\u8fd9\u9650\u5236\u5462\uff1f\u5f53\u7136\u6709\uff0c\u90a3\u5c31\u662fJava\u5f3a\u5927\u53c8\u6050\u6016\u7684\u53cd\u5c04\u673a\u5236\u3002<br \/>\nJava\u7684\u53cd\u5c04\u673a\u5236\u5f88\u7075\u6d3b\uff0c\u6211\u5c31\u4e0d\u8be6\u7ec6\u4ecb\u7ecd\u4e86\uff0c\u53ea\u8bb2\u89e3\u4e0b\u53cd\u5c04\u673a\u5236\u662f\u5982\u4f55\u5f71\u54cd\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u9898\u4e2d\u6548\u679c\u7684\u5b9e\u73b0\u7684\u3002<\/p>\n<h5>\u4ec0\u4e48\u662fJava\u53cd\u5c04\u673a\u5236\uff1f<\/h5>\n<p>\u8fd9\u4e2a\u673a\u5236\u5c31\u662fJava\u5141\u8bb8\u7a0b\u5e8f\u5728\u8fd0\u884c\u671f\u95f4\u83b7\u53d6\u7c7b\u7684\u5404\u79cd\u5c5e\u6027\uff0c\u5305\u62ec\u58f0\u660e\u7684\u65b9\u6cd5\uff0c\u6210\u5458\u53d8\u91cf\uff0c\u4ee5\u53ca\u4f7f\u7528\u4e86\u4ec0\u4e48\u4fee\u9970\u7b26\uff0c\u65b9\u6cd5\u6709\u54ea\u4e9b\u53c2\u6570\uff0c\u5206\u522b\u662f\u4ec0\u4e48\u7c7b\u578b\u7b49\u3002\u9664\u4e86\u5bf9\u8fd9\u4e9b\u5c5e\u6027\u8fdb\u884c\u8bfb\u53d6\u64cd\u4f5c\uff0c\u8fd8\u80fd\u5bf9\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u8bbe\u7f6e\u503c\u64cd\u4f5c\uff0c\u5bf9\u53ef\u8bbf\u95ee\u6027\u8fdb\u884c\u4fee\u6539\uff08\u53ef\u7a81\u7834private\u548c\u90e8\u5206final\u9650\u5236\uff09\uff0c\u5bf9\u65b9\u6cd5\u8fdb\u884c\u8c03\u7528\uff0c\u5b9e\u4f8b\u5316\u5bf9\u8c61\u7b49\u7b49\u64cd\u4f5c\u3002<\/p>\n<p>\u6240\u4ee5Java\u53cd\u5c04\u673a\u5236\u662f\u975e\u5e38<strong>\u5f3a\u5927\u800c\u53c8\u5371\u9669<\/strong>\u7684\uff0c\u5229\u7528\u53cd\u5c04\u673a\u5236\u53ef\u4ee5\u5b9e\u73b0\u5404\u79cd\u529f\u80fd\u7075\u6d3b\u7684\u5de5\u5177\u548c\u6846\u67b6\uff08\u6bd4\u5982\u5927\u540d\u9f0e\u9f0e\u7684Spring\uff09\uff0c\u4f46\u4e5f\u53ef\u4ee5\u7834\u574f\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u4e0a\u7684\u5c01\u88c5\u6027\uff0c\u751a\u81f3\u662f\u7be1\u6539\u7a0b\u5e8f\u8fd0\u884c\u671f\u95f4\u7684\u6570\u636e\uff08\u6bd4\u5982\u8457\u540d\u6c99\u76d2\u6e38\u620fMinecraft\u7684Mod\u5b9e\u73b0\u5c31\u5927\u91cf\u4f9d\u8d56\u4e86\u8fd9\u4e2a\uff09<\/p>\n<h4>\u4f7f\u7528\u53cd\u5c04\u4fee\u6539Integer\u5bf9\u8c61\u7684value\u5c5e\u6027<\/h4>\n<p>\u8fd9\u4e2a\u5c31\u662f\u6838\u5fc3\u90e8\u5206\u4e86\uff0c\u5229\u7528Integer\u7684\u81ea\u52a8\u62c6\u88c5\u7bb1\u4e0e\u7f13\u5b58\u673a\u5236\uff0c\u6211\u4eec\u901a\u8fc7\u53cd\u5c04\u53bb\u5f3a\u884c\u4fee\u6539Integer\u7f13\u5b58\u4e2d\u67d0\u4e2a\u5bf9\u8c61\u7684value\u3002<br \/>\n\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">\/\/ \u5148\u62ff\u5230\u6570\u5b571\u7684Integer\u5bf9\u8c61\uff08\u5f53\u7136\uff0c\u8fd9\u4e2a\u662fInteger\u7f13\u5b58\u6570\u7ec4\u4e2d\u62ff\u5230\u7684\u5bf9\u8c61\uff0c\u524d\u9762\u8bb2\u7f13\u5b58\u673a\u5236\u7684\u65f6\u5019\u6709\u8bb2\u5230\uff09\nInteger a = 1;\ntry {\n    \/\/ \u83b7\u53d6\u5bf9\u8c61Integer\u4e2d\u540d\u4e3avalue\u7684\u5b57\u6bb5\u4fe1\u606f\uff08\u53cd\u5c04\u673a\u5236\uff09\n    \/\/ \u6ce8\uff1aa.getClass()\u76f8\u5f53\u4e8eInteger.class\uff0c\u83b7\u53d6Integer\u7684class\u5bf9\u8c61\uff0cclass\u5bf9\u8c61\u662f\u53cd\u5c04\u8c03\u7528\u4e00\u4e2a\u5173\u952e\u5bf9\u8c61\uff0c\u91cc\u9762\u5305\u542b\u4e86\u7c7b\u7684\u5404\u79cd\u4fe1\u606f\uff0c\u611f\u5174\u8da3\u7684\u53ef\u53e6\u5916\u627e\u6587\u7ae0\u9605\u8bfb\uff0c\u7f51\u4e0a\u8d44\u6599\u4e5f\u5f88\u591a\n    Field value = a.getClass().getDeclaredField(&quot;value&quot;);\n\n    \/\/ \u5c06value\u5b57\u6bb5\u7684\u53cd\u5c04\u53ef\u8bbf\u95ee\u6027\u8bbe\u7f6e\u4e3atrue\uff0c\u5373\u5141\u8bb8\u53cd\u5c04\u8bbf\u95ee\uff0c\u8fd9\u6837\u5c31\u80fd\u7a81\u7834private\u7684\u9650\u5236\n    value.setAccessible(true);\n\n    \/\/ \u5c06Integer\u5bf9\u8c61\u7684value\u5b57\u6bb5\u503c\u8bbe\u7f6e\u4e3a114513\n    \/\/ \u56e0\u4e3avalue\u662f\u5bf9\u8c61\u7684\u5b9e\u4f8b\u5c5e\u6027\uff0c\u6240\u4ee5\u9700\u8981\u6311\u4e00\u4e2a\u88ab\u8fd9\u4e2a\u4f5c\u7528\u5f71\u54cd\u7684\u5b9e\u4f8b\u5bf9\u8c61\n    \/\/ \u8fd9\u91cc\u5c31\u6311\u4e86\u4eceInteger\u7f13\u5b58\u91cc\u62ff\u5230\u7684\u5b9e\u4f8b\u5bf9\u8c61\uff0c\u5f3a\u884c\u8bbe\u7f6e\u8fd9\u4e2a\u5bf9\u8c61\u7684value\u503c\n    value.set(a, 114513);\n} catch (NoSuchFieldException | IllegalAccessException e) {\n\n    \/\/ \u5c1d\u8bd5\u83b7\u53d6\u4e0d\u5b58\u5728\u7684\u5b57\u6bb5\n    \/\/ \u6216\n    \/\/ \u8bfb\u5199\u88ab\u4fdd\u62a4\u7ea6\u675f\u7684\u5bf9\u8c61\u5c5e\u6027\u5b57\u6bb5\uff08private\uff0cprotect\u7b49\u7ea6\u675f\uff09\u65f6\u629b\u51fa\uff08\u5982\u679c\u4f60\u6ca1\u6539\u53d8\u8bbf\u95ee\u6027\u7684\u8bdd\uff09\n    e.printStackTrace();\n}<\/code><\/pre>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u4e00\u65e6\u6267\u884c\uff0c<font color=\"red\"><strong>\u4efb\u4f55\u901a\u8fc7valueOf\u6216\u81ea\u52a8\u88c5\u7bb1\u673a\u5236\u83b7\u53d6\u5230\u7684\u201c\u503c\u4e3a1\u201d\u7684Integer\u5bf9\u8c61\u65f6\uff0c\u5b9e\u9645\u4e0a\u5b83\u7684value\u5df2\u7ecf\u662f114513\u4e86\u3002<\/strong><\/font><\/p>\n<p>\u4f46\u662f\u6587\u7ae0\u7684\u793a\u4f8b\u4ee3\u7801\u4e2d\u5e76\u672a\u5728main\u51fd\u6570\u4e2d\u5bf9\u8fd9\u4e9b\u4ee3\u7801\u4e3b\u52a8\u8fdb\u884c\u8c03\u7528\uff0c<font color=\"red\"><strong>\u800c\u662f\u88abstatic\u5173\u952e\u5b57\u5305\u8d77\u6765<\/strong><\/font>\uff0c\u90a3\u4e48\u8fd9\u4e9b\u4ee3\u7801\u662f\u600e\u4e48\u6267\u884c\u7684\u5462\uff1f\u6267\u884c\u7684\u65f6\u673a\u53c8\u662f\u4ec0\u4e48\uff1f<\/p>\n<p>\u4e0b\u9762\u5c31\u9700\u8981\u7b80\u5355\u4e86\u89e3\u4e0bJVM\u7684\u7c7b\u52a0\u8f7d\u673a\u5236\u4e86<\/p>\n<h3>JVM\u7c7b\u52a0\u8f7d\u673a\u5236<\/h3>\n<p>\u9996\u5148\uff0cJava\u7c7b\u7684\u52a0\u8f7d\u9075\u5faa\u7684\u662f\u61d2\u52a0\u8f7d\u539f\u5219\u3002\u4ec0\u4e48\u610f\u601d\u5462\uff1f\u5c31\u662f\u4f60\u8c03\u7528\u5230\u7684\u65f6\u5019\u624d\u4f1a\u53bb\u52a0\u8f7d\uff0c\u4f60\u8fd8\u6ca1\u8c03\u7528\u5230\u5c31\u4e0d\u52a0\u8f7d\uff0c\u5c31\u50cf\u4e00\u4e2a\u61d2\u6c49\uff08\u62d3\u5c55\u5ef6\u4f38\uff1a\u61d2\u6c49\u5f0f\u5355\u4f8b\u6a21\u5f0f\uff09\uff0c\u5e72\u6d3b\u7684\u65f6\u5019\u8e22\u4e00\u811a\u624d\u52a8\u4e00\u4e0b\u3002<\/p>\n<h4>\u7c7b\u52a0\u8f7d\u6d41\u7a0b<\/h4>\n<p>\u4e00\u4e2a\u7c7b\u5728Java\u865a\u62df\u673a\u4e2d\u4ece\u88ab\u52a0\u8f7d\u5230\u5378\u8f7d\uff0c\u4f1a\u6309\u987a\u5e8f\u6d89\u53ca\u5230\u4e0b\u9762\u7684\u6d41\u7a0b<\/p>\n<ol>\n<li>\n<p>\u52a0\u8f7d - \u5c06class\u5b57\u8282\u7801\u6587\u4ef6\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u5e76\u5c06\u8fd9\u4e9b\u6570\u636e\u8f6c\u6362\u6210\u65b9\u6cd5\u533a\u4e2d\u7684\u8fd0\u884c\u65f6\u6570\u636e\uff08\u9759\u6001\u53d8\u91cf\u3001\u9759\u6001\u4ee3\u7801\u5757\u3001\u5e38\u91cf\u6c60\u7b49\uff09\uff0c\u5728\u5806\u4e2d\u751f\u6210\u4e00\u4e2aClass\u7c7b\u5bf9\u8c61\u4ee3\u8868\u8fd9\u4e2a\u7c7b\uff08\u53cd\u5c04\u539f\u7406\uff09\uff0c\u4f5c\u4e3a\u65b9\u6cd5\u533a\u7c7b\u6570\u636e\u7684\u8bbf\u95ee\u5165\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u94fe\u63a5<br \/>\n\u603b\u4f53\u4e0a\u5c31\u662f\u5c06Java\u7c7b\u7684\u4e8c\u8fdb\u5236\u4ee3\u7801\u5408\u5e76\u5230JVM\u7684\u8fd0\u884c\u72b6\u6001\u4e4b\u4e2d\u3002<\/p>\n<ol>\n<li>\u9a8c\u8bc1 - \u9a8c\u8bc1Java\u7c7b\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u5408\u4e0d\u5408\u6cd5\uff0c\u683c\u5f0f\u5bf9\u4e0d\u5bf9<\/li>\n<li>\u51c6\u5907 - \u6b63\u5f0f\u4e3a\u7c7b\u53d8\u91cf(static\u53d8\u91cf)\u5206\u914d\u5185\u5b58\u5e76\u8bbe\u7f6e\u7c7b\u53d8\u91cf\u521d\u59cb\u503c\u7684\u9636\u6bb5\uff0c\u8fd9\u4e9b\u5185\u5b58\u90fd\u5c06\u5728\u65b9\u6cd5\u533a\u4e2d\u8fdb\u884c\u5206\u914d\u3002\u6ce8\u610f\u6b64\u65f6\u7684\u8bbe\u7f6e\u521d\u59cb\u503c\u4e3a\u9ed8\u8ba4\u503c\uff0c\u5177\u4f53\u8d4b\u503c\u5728\u521d\u59cb\u5316\u9636\u6bb5\u5b8c\u6210\u3002<\/li>\n<li>\u89e3\u6790 - \u865a\u62df\u673a\u5e38\u91cf\u6c60\u5185\u7684\u7b26\u53f7\u5f15\u7528\u66ff\u6362\u4e3a\u76f4\u63a5\u5f15\u7528\uff08\u5730\u5740\u5f15\u7528\uff09\u7684\u8fc7\u7a0b\u3002<\/li>\n<\/ol>\n<\/li>\n<li>\n<p>\u521d\u59cb\u5316<br \/>\n\u521d\u59cb\u5316\u9636\u6bb5\u662f\u6267\u884c\u7c7b\u6784\u9020\u5668<clinit>()\u65b9\u6cd5\u7684\u8fc7\u7a0b\u3002\u7c7b\u6784\u9020\u5668<clinit>()\u65b9\u6cd5\u662f\u7531<font color=\"red\">\u7f16\u8bd1\u5668\u81ea\u52a8\u6536\u96c6<strong>\u7c7b\u4e2d\u7684\u6240\u6709\u7c7b\u53d8\u91cf\u7684\u8d4b\u503c\u52a8\u4f5c\u548c\u9759\u6001\u8bed\u53e5\u5757(static\u5757)<\/strong>\u4e2d\u7684\u8bed\u53e5\u5408\u5e76\u4ea7\u751f\u7684\u3002<\/font><\/p>\n<ul>\n<li>\u5f53\u521d\u59cb\u5316\u4e00\u4e2a\u7c7b\u7684\u65f6\u5019\uff0c\u5982\u679c\u53d1\u73b0\u5176\u7236\u7c7b\u8fd8\u6ca1\u6709\u8fdb\u884c\u8fc7\u521d\u59cb\u5316\u3001\u5219\u9700\u8981\u5148\u521d\u59cb\u5316\u5176\u7236\u7c7b\u3002<\/li>\n<li>\u865a\u62df\u673a\u4f1a\u4fdd\u8bc1\u4e00\u4e2a\u7c7b\u7684<clinit>()\u65b9\u6cd5\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u88ab\u6b63\u786e\u52a0\u9501\u548c\u540c\u6b65\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4f7f\u7528<\/p>\n<\/li>\n<li>\n<p>\u5378\u8f7d<br 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