{"id":1224,"date":"2026-04-15T18:24:17","date_gmt":"2026-04-15T10:24:17","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=1224"},"modified":"2026-04-15T18:24:19","modified_gmt":"2026-04-15T10:24:19","slug":"%e3%80%90java%e3%80%91static%e5%85%b3%e9%94%ae%e5%ad%97%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90%ef%bc%9a%e4%bb%8e%e5%9f%ba%e7%a1%80%e7%94%a8%e6%b3%95%e5%88%b0%e5%ae%9e%e6%88%98%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=1224","title":{"rendered":"\u3010Java\u3011static\u5173\u952e\u5b57\u6df1\u5ea6\u89e3\u6790\uff1a\u4ece\u57fa\u7840\u7528\u6cd5\u5230\u5b9e\u6218\u6280\u5de7"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e91\u626c\uff5e \u4eca\u5929\u54b1\u4eec\u6765\u6df1\u5165\u804a\u804a Java \u4e2d\u975e\u5e38\u57fa\u7840\u4f46\u53c8\u81f3\u5173\u91cd\u8981\u7684 static \u5173\u952e\u5b57\u3002\u76f8\u4fe1\u5f88\u591a\u521a\u5165\u95e8 Java \u7684\u5c0f\u4f19\u4f34\u90fd\u5bf9\u8fd9\u4e2a\u5173\u952e\u5b57\u53c8\u7231\u53c8\u6068 \u2014\u2014 \u5b83\u7528\u6cd5\u7b80\u5355\uff0c\u4f46\u7a0d\u4e0d\u6ce8\u610f\u5c31\u5bb9\u6613\u8e29\u5751\u3002\u8fd9\u7bc7\u6587\u7ae0\u6211\u4f1a\u7ed3\u5408\u5b9e\u9645\u4ee3\u7801\u793a\u4f8b\uff0c\u628a static \u7684\u6838\u5fc3\u7528\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879\u8bb2\u900f\uff0c\u65b0\u624b\u4e5f\u80fd\u8f7b\u677e\u7406\u89e3\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001static \u5173\u952e\u5b57\u7684\u6838\u5fc3\u4f5c\u7528<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5148\u4e00\u53e5\u8bdd\u6982\u62ec\u6838\u5fc3\uff1a<strong>static \u5141\u8bb8\u6211\u4eec\u5728\u4e0d\u521b\u5efa\u5bf9\u8c61\u7684\u60c5\u51b5\u4e0b\uff0c\u76f4\u63a5\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\u53d8\u91cf\u6216\u65b9\u6cd5<\/strong>\u3002\u6362\u53e5\u8bdd\u8bf4\uff0cstatic \u4fee\u9970\u7684\u6210\u5458\u5c5e\u4e8e \u201c\u7c7b\u7ea7\u522b\u7684\u8d44\u6e90\u201d\uff0c\u800c\u975e \u201c\u5bf9\u8c61\u7ea7\u522b\u7684\u8d44\u6e90\u201d\u2014\u2014 \u53ea\u8981\u7c7b\u88ab JVM \u52a0\u8f7d\uff0c\u8fd9\u4e9b\u8d44\u6e90\u5c31\u4f1a\u521d\u59cb\u5316\uff0c\u4e0d\u9700\u8981\u4f9d\u8d56\u4efb\u4f55\u5b9e\u4f8b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u9759\u6001\u53d8\u91cf\uff1a\u8282\u7701\u5185\u5b58\u7684\u5171\u4eab\u8d44\u6e90<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5b9a\u4e49\u4e0e\u7279\u70b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u9759\u6001\u53d8\u91cf\uff08\u4e5f\u53eb\u7c7b\u53d8\u91cf\uff09\u5728\u7c7b\u52a0\u8f7d\u65f6\u4ec5\u521d\u59cb\u5316\u4e00\u6b21\uff0c\u6240\u6709\u5bf9\u8c61\u5171\u4eab\u8fd9\u4e00\u5757\u5185\u5b58\u7a7a\u95f4\u3002\u4e3e\u4e2a\u5b9e\u9645\u573a\u666f\uff1a\u4e00\u4e2a\u73ed\u7ea7\u7684\u6240\u6709\u5b66\u751f\u90fd\u5c5e\u4e8e\u540c\u4e00\u6240\u5b66\u6821\uff0c\u8fd9\u4e2a \u201c\u5b66\u6821\u540d\u79f0\u201d \u5c31\u9002\u5408\u5b9a\u4e49\u4e3a\u9759\u6001\u53d8\u91cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u4ee3\u7801\u793a\u4f8b<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Student {\n    \/\/ \u9759\u6001\u53d8\u91cf\uff1a\u6240\u6709\u5b66\u751f\u5171\u4eab\u7684\u5b66\u6821\u540d\u79f0\n    public static String SCHOOL_NAME = \"\u9633\u5149\u4e2d\u5b66\";\n    \/\/ \u975e\u9759\u6001\u53d8\u91cf\uff1a\u6bcf\u4e2a\u5b66\u751f\u72ec\u6709\u7684\u59d3\u540d\n    private String name;\n\n    public Student(String name) {\n        this.name = name;\n    }\n\n    public static void main(String&#91;] args) {\n        \/\/ \u6b63\u786e\u7528\u6cd5\uff1a\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\u9759\u6001\u53d8\u91cf\uff08\u63a8\u8350\uff09\n        System.out.println(\"\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\uff1a\" + Student.SCHOOL_NAME);\n\n        \/\/ \u521b\u5efa\u4e24\u4e2a\u5b66\u751f\u5bf9\u8c61\n        Student student1 = new Student(\"\u5c0f\u660e\");\n        Student student2 = new Student(\"\u5c0f\u7ea2\");\n\n        \/\/ \u4e0d\u63a8\u8350\uff1a\u901a\u8fc7\u5bf9\u8c61\u8bbf\u95ee\u9759\u6001\u53d8\u91cf\uff08\u7f16\u8bd1\u5668\u4f1a\u8b66\u544a\uff09\n        System.out.println(\"\u901a\u8fc7\u5bf9\u8c611\u8bbf\u95ee\uff1a\" + student1.SCHOOL_NAME);\n        System.out.println(\"\u901a\u8fc7\u5bf9\u8c612\u8bbf\u95ee\uff1a\" + student2.SCHOOL_NAME);\n\n        \/\/ \u4efb\u610f\u5bf9\u8c61\u4fee\u6539\u9759\u6001\u53d8\u91cf\uff0c\u6240\u6709\u5bf9\u8c61\u90fd\u4f1a\u53d7\u5f71\u54cd\n        student1.SCHOOL_NAME = \"\u661f\u5149\u4e2d\u5b66\";\n        System.out.println(\"\u4fee\u6539\u540e\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\uff1a\" + Student.SCHOOL_NAME);\n        System.out.println(\"\u4fee\u6539\u540e\u901a\u8fc7\u5bf9\u8c612\u8bbf\u95ee\uff1a\" + student2.SCHOOL_NAME);\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u8fd0\u884c\u7ed3\u679c<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\uff1a\u9633\u5149\u4e2d\u5b66\n\u901a\u8fc7\u5bf9\u8c611\u8bbf\u95ee\uff1a\u9633\u5149\u4e2d\u5b66\n\u901a\u8fc7\u5bf9\u8c612\u8bbf\u95ee\uff1a\u9633\u5149\u4e2d\u5b66\n\u4fee\u6539\u540e\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\uff1a\u661f\u5149\u4e2d\u5b66\n\u4fee\u6539\u540e\u901a\u8fc7\u5bf9\u8c612\u8bbf\u95ee\uff1a\u661f\u5149\u4e2d\u5b66\n<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\uff1a\u7f16\u8bd1\u5668\u4f1a\u5bf9 \u201c\u5bf9\u8c61\u8bbf\u95ee\u9759\u6001\u53d8\u91cf\u201d \u53d1\u51fa\u8b66\u544a\uff0c\u867d\u7136\u80fd\u8fd0\u884c\uff0c\u4f46\u8fdd\u80cc\u8bbe\u8ba1\u521d\u8877\uff0c\u5c3d\u91cf\u907f\u514d\uff01<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u9759\u6001\u65b9\u6cd5\uff1a\u65e0\u9700\u5b9e\u4f8b\u7684\u5de5\u5177\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u6838\u5fc3\u7279\u5f81\u4e0e\u9650\u5236<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9759\u6001\u65b9\u6cd5\u5c5e\u4e8e\u7c7b\uff0c\u65e0\u9700\u521b\u5efa\u5bf9\u8c61\u5373\u53ef\u8c03\u7528<\/li>\n\n\n\n<li>\u53ea\u80fd\u8bbf\u95ee\u9759\u6001\u53d8\u91cf\u548c\u9759\u6001\u65b9\u6cd5\uff0c\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u975e\u9759\u6001\u6210\u5458\uff08\u56e0\u4e3a\u975e\u9759\u6001\u6210\u5458\u4f9d\u8d56\u5bf9\u8c61\u5b9e\u4f8b\uff09<\/li>\n\n\n\n<li>\u4e0d\u80fd\u4f7f\u7528<code>this<\/code>\u6216<code>super<\/code>\u5173\u952e\u5b57\uff08<code>this<\/code>\u4ee3\u8868\u5f53\u524d\u5bf9\u8c61\uff0c\u9759\u6001\u65b9\u6cd5\u65e0\u5bf9\u8c61\u5173\u8054\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u4ee3\u7801\u793a\u4f8b\uff1a\u5de5\u5177\u7c7b\u5b9e\u6218<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.Arrays;\n\npublic class ArrayUtils {\n    \/\/ \u9759\u6001\u53d8\u91cf\uff1a\u5de5\u5177\u7c7b\u7248\u672c\uff08\u5171\u4eab\u8d44\u6e90\uff09\n    private static final String VERSION = \"1.0.0\";\n\n    \/\/ \u9759\u6001\u65b9\u6cd5\uff1a\u6570\u7ec4\u6392\u5e8f\uff08\u5de5\u5177\u65b9\u6cd5\uff09\n    public static int&#91;] sortArray(int&#91;] array) {\n        if (array == null || array.length == 0) {\n            throw new IllegalArgumentException(\"\u6570\u7ec4\u4e0d\u80fd\u4e3a\u7a7a\");\n        }\n        int&#91;] result = Arrays.copyOf(array, array.length);\n        Arrays.sort(result);\n        return result;\n    }\n\n    \/\/ \u9759\u6001\u65b9\u6cd5\uff1a\u83b7\u53d6\u5de5\u5177\u7c7b\u7248\u672c\n    public static String getVersion() {\n        return VERSION;\n    }\n\n    \/\/ \u975e\u9759\u6001\u53d8\u91cf\uff08\u4ec5\u4f5c\u6f14\u793a\uff1a\u9759\u6001\u65b9\u6cd5\u65e0\u6cd5\u8bbf\u95ee\uff09\n    private String author = \"\u4e91\u626c\";\n\n    public static void main(String&#91;] args) {\n        \/\/ \u65e0\u9700\u521b\u5efa\u5bf9\u8c61\uff0c\u76f4\u63a5\u901a\u8fc7\u7c7b\u540d\u8c03\u7528\u9759\u6001\u65b9\u6cd5\n        int&#91;] original = {3, 1, 4, 1, 5, 9};\n        int&#91;] sorted = ArrayUtils.sortArray(original);\n        System.out.println(\"\u6392\u5e8f\u540e\u6570\u7ec4\uff1a\" + Arrays.toString(sorted));\n        System.out.println(\"\u5de5\u5177\u7c7b\u7248\u672c\uff1a\" + ArrayUtils.getVersion());\n\n        \/\/ \u9519\u8bef\u6f14\u793a\uff1a\u9759\u6001\u65b9\u6cd5\u4e0d\u80fd\u8bbf\u95ee\u975e\u9759\u6001\u53d8\u91cf\uff08\u7f16\u8bd1\u62a5\u9519\uff09\n        \/\/ System.out.println(author); \n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4e3a\u4ec0\u4e48 main \u65b9\u6cd5\u662f\u9759\u6001\u7684\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u9762\u8bd5\u9ad8\u9891\u9898\uff01\u7b54\u6848\u5f88\u7b80\u5355\uff1a<strong>main \u65b9\u6cd5\u662f\u7a0b\u5e8f\u5165\u53e3\uff0cJVM \u542f\u52a8\u65f6\u9700\u8981\u76f4\u63a5\u8c03\u7528\u5b83\uff0c\u5982\u679c\u662f\u975e\u9759\u6001\u7684\uff0cJVM \u5fc5\u987b\u5148\u521b\u5efa\u5bf9\u8c61\u624d\u80fd\u8c03\u7528 \u2014\u2014 \u8fd9\u4f1a\u5bfc\u81f4\u903b\u8f91\u77db\u76fe\uff08\u6ca1\u6709\u5165\u53e3\u600e\u4e48\u521b\u5efa\u5bf9\u8c61\uff1f\uff09<\/strong>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u9759\u6001\u4ee3\u7801\u5757\uff1a\u7c7b\u52a0\u8f7d\u65f6\u7684\u521d\u59cb\u5316\u795e\u5668<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5b9a\u4e49\u4e0e\u4f5c\u7528<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u9759\u6001\u4ee3\u7801\u5757\u662f\u7528<code>static {}<\/code>\u5305\u88f9\u7684\u4ee3\u7801\u7247\u6bb5\uff0c<strong>\u5728\u7c7b\u52a0\u8f7d\u65f6\u81ea\u52a8\u6267\u884c\uff0c\u4e14\u4ec5\u6267\u884c\u4e00\u6b21<\/strong>\u3002\u5e38\u7528\u4e8e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u521d\u59cb\u5316\u9759\u6001\u53d8\u91cf\uff08\u5c24\u5176\u662f\u590d\u6742\u903b\u8f91\u7684\u521d\u59cb\u5316\uff09<\/li>\n\n\n\n<li>\u52a0\u8f7d\u914d\u7f6e\u6587\u4ef6\u3001\u6ce8\u518c\u9a71\u52a8\u7b49\u4e00\u6b21\u6027\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u4ee3\u7801\u793a\u4f8b\uff1a\u6a21\u62df\u914d\u7f6e\u52a0\u8f7d<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.HashMap;\nimport java.util.Map;\n\npublic class ConfigLoader {\n    \/\/ \u9759\u6001\u53d8\u91cf\uff1a\u5b58\u50a8\u914d\u7f6e\u4fe1\u606f\n    public static Map configMap = new HashMap();\n\n    \/\/ \u9759\u6001\u4ee3\u7801\u5757\uff1a\u521d\u59cb\u5316\u914d\u7f6e\uff08\u7c7b\u52a0\u8f7d\u65f6\u6267\u884c\uff09\n    static {\n        System.out.println(\"\u5f00\u59cb\u52a0\u8f7d\u914d\u7f6e\u6587\u4ef6...\");\n        \/\/ \u6a21\u62df\u4ece\u914d\u7f6e\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\n        configMap.put(\"timeout\", \"3000\");\n        configMap.put(\"charset\", \"UTF-8\");\n        configMap.put(\"maxConnections\", \"100\");\n        System.out.println(\"\u914d\u7f6e\u52a0\u8f7d\u5b8c\u6210\uff01\");\n    }\n\n    public static void main(String&#91;] args) {\n        \/\/ \u76f4\u63a5\u4f7f\u7528\u521d\u59cb\u5316\u540e\u7684\u9759\u6001\u53d8\u91cf\n        System.out.println(\"\u8d85\u65f6\u65f6\u95f4\uff1a\" + configMap.get(\"timeout\") + \"ms\");\n        System.out.println(\"\u7f16\u7801\u683c\u5f0f\uff1a\" + configMap.get(\"charset\"));\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u8fd0\u884c\u7ed3\u679c<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5f00\u59cb\u52a0\u8f7d\u914d\u7f6e\u6587\u4ef6...\n\u914d\u7f6e\u52a0\u8f7d\u5b8c\u6210\uff01\n\u8d85\u65f6\u65f6\u95f4\uff1a3000ms\n\u7f16\u7801\u683c\u5f0f\uff1aUTF-8\n<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u5173\u952e\uff1a\u9759\u6001\u4ee3\u7801\u5757\u6267\u884c\u987a\u5e8f\u4f18\u5148\u4e8e main \u65b9\u6cd5\uff0c\u4e14\u53ea\u6267\u884c\u4e00\u6b21 \u2014\u2014 \u5373\u4f7f\u521b\u5efa\u591a\u4e2a\u5bf9\u8c61\uff0c\u4e5f\u4e0d\u4f1a\u91cd\u590d\u6267\u884c\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u9759\u6001\u5185\u90e8\u7c7b\uff1a\u4f18\u96c5\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u6838\u5fc3\u7279\u6027<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9759\u6001\u5185\u90e8\u7c7b\u4e0d\u5c5e\u4e8e\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\uff0c\u800c\u662f\u5c5e\u4e8e\u5916\u90e8\u7c7b\u672c\u8eab<\/li>\n\n\n\n<li>\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u7c7b\u7684\u9759\u6001\u53d8\u91cf\uff08\u5305\u62ec\u79c1\u6709\uff09\uff0c\u4f46\u4e0d\u80fd\u8bbf\u95ee\u975e\u9759\u6001\u53d8\u91cf<\/li>\n\n\n\n<li>\u5916\u90e8\u7c7b\u4e0d\u80fd\u5b9a\u4e49\u4e3a static\uff0c\u4f46\u5185\u90e8\u7c7b\u53ef\u4ee5<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u5b9e\u6218\uff1a\u9759\u6001\u5185\u90e8\u7c7b\u5b9e\u73b0\u5355\u4f8b\uff08\u63a8\u8350\u65b9\u6848\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u65b9\u5f0f\u662f Java \u5355\u4f8b\u6a21\u5f0f\u7684\u6700\u4f18\u89e3\u4e4b\u4e00 \u2014\u2014 \u5ef6\u8fdf\u52a0\u8f7d\u3001\u7ebf\u7a0b\u5b89\u5168\u3001\u65e0\u6027\u80fd\u635f\u8017\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Singleton {\n    \/\/ \u79c1\u6709\u6784\u9020\u65b9\u6cd5\uff1a\u9632\u6b62\u5916\u90e8\u521b\u5efa\u5bf9\u8c61\n    private Singleton() {}\n\n    \/\/ \u9759\u6001\u5185\u90e8\u7c7b\uff1a\u6301\u6709\u5355\u4f8b\u5b9e\u4f8b\n    private static class SingletonHolder {\n        \/\/ \u9759\u6001\u5e38\u91cf\uff1a\u521d\u59cb\u5316\u5355\u4f8b\uff08\u7c7b\u52a0\u8f7d\u65f6\u4ec5\u6267\u884c\u4e00\u6b21\uff0c\u5929\u751f\u7ebf\u7a0b\u5b89\u5168\uff09\n        private static final Singleton INSTANCE = new Singleton();\n    }\n\n    \/\/ \u9759\u6001\u65b9\u6cd5\uff1a\u63d0\u4f9b\u5168\u5c40\u8bbf\u95ee\u5165\u53e3\n    public static Singleton getInstance() {\n        return SingletonHolder.INSTANCE;\n    }\n\n    \/\/ \u6d4b\u8bd5\u65b9\u6cd5\n    public void doSomething() {\n        System.out.println(\"\u5355\u4f8b\u5bf9\u8c61\u6267\u884c\u64cd\u4f5c\uff1a\" + this.hashCode());\n    }\n\n    public static void main(String&#91;] args) {\n        \/\/ \u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u6d4b\u8bd5\uff08\u9a8c\u8bc1\u552f\u4e00\u6027\uff09\n        for (int i = 0; i 5; i++) {\n            new Thread(() -&gt; {\n                Singleton instance = Singleton.getInstance();\n                instance.doSomething();\n            }).start();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u8fd0\u884c\u7ed3\u679c<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5355\u4f8b\u5bf9\u8c61\u6267\u884c\u64cd\u4f5c\uff1a123456789\n\u5355\u4f8b\u5bf9\u8c61\u6267\u884c\u64cd\u4f5c\uff1a123456789\n\u5355\u4f8b\u5bf9\u8c61\u6267\u884c\u64cd\u4f5c\uff1a123456789\n\u5355\u4f8b\u5bf9\u8c61\u6267\u884c\u64cd\u4f5c\uff1a123456789\n\u5355\u4f8b\u5bf9\u8c61\u6267\u884c\u64cd\u4f5c\uff1a123456789\n<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u89e3\u91ca\uff1a\u53ea\u6709\u7b2c\u4e00\u6b21\u8c03\u7528<code>getInstance()<\/code>\u65f6\uff0cJVM \u624d\u4f1a\u52a0\u8f7d<code>SingletonHolder<\/code>\u5e76\u521d\u59cb\u5316<code>INSTANCE<\/code>\uff0c\u5b9e\u73b0\u5ef6\u8fdf\u52a0\u8f7d\uff1b\u540c\u65f6\u7c7b\u52a0\u8f7d\u8fc7\u7a0b\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u65e0\u9700\u989d\u5916\u52a0\u9501\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001static \u5173\u952e\u5b57\u5e38\u89c1\u5751\u70b9\u603b\u7ed3<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e0d\u8981\u901a\u8fc7\u5bf9\u8c61\u8bbf\u95ee\u9759\u6001\u6210\u5458<\/strong>\uff1a\u867d\u7136\u8bed\u6cd5\u5141\u8bb8\uff0c\u4f46\u8fdd\u80cc\u8bbe\u8ba1\u521d\u8877\uff0c\u4e14\u53ef\u8bfb\u6027\u5dee<\/li>\n\n\n\n<li><strong>\u9759\u6001\u65b9\u6cd5\u4e0d\u80fd\u8bbf\u95ee\u975e\u9759\u6001\u6210\u5458<\/strong>\uff1a\u8bb0\u4f4f \u201c\u9759\u6001\u5bf9\u9759\u6001\uff0c\u975e\u9759\u6001\u5bf9\u6240\u6709\u201d<\/li>\n\n\n\n<li><strong>\u9759\u6001\u53d8\u91cf\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684<\/strong>\uff1a\u591a\u7ebf\u7a0b\u4fee\u6539\u65f6\u9700\u52a0\u9501\uff08\u5982<code>volatile<\/code>\u3001<code>synchronized<\/code>\uff09<\/li>\n\n\n\n<li><strong>\u9759\u6001\u4ee3\u7801\u5757\u6267\u884c\u987a\u5e8f<\/strong>\uff1a\u591a\u4e2a\u9759\u6001\u4ee3\u7801\u5757\u6309\u5b9a\u4e49\u987a\u5e8f\u6267\u884c\uff0c\u4e14\u4ec5\u6267\u884c\u4e00\u6b21<\/li>\n\n\n\n<li><strong>\u9759\u6001\u5185\u90e8\u7c7b\u4e0e\u975e\u9759\u6001\u5185\u90e8\u7c7b\u7684\u533a\u522b<\/strong>\uff1a\u9759\u6001\u5185\u90e8\u7c7b\u65e0\u5916\u90e8\u7c7b\u5f15\u7528\uff0c\u975e\u9759\u6001\u5185\u90e8\u7c7b\u6301\u6709\u5916\u90e8\u7c7b\u5b9e\u4f8b<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u540e\u60f3\u8bf4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">static \u5173\u952e\u5b57\u662f Java \u57fa\u7840\u4e2d\u7684\u57fa\u7840\uff0c\u4f46\u5b83\u7684\u5e94\u7528\u573a\u666f\u975e\u5e38\u5e7f\u6cdb \u2014\u2014 \u4ece\u5de5\u5177\u7c7b\u3001\u5355\u4f8b\u6a21\u5f0f\u5230\u914d\u7f6e\u52a0\u8f7d\uff0c\u51e0\u4e4e\u6240\u6709 Java \u9879\u76ee\u90fd\u4f1a\u7528\u5230\u3002\u638c\u63e1\u5b83\u7684\u6838\u5fc3\u903b\u8f91\uff08\u7c7b\u7ea7\u522b\u7684\u8d44\u6e90\u5171\u4eab\u4e0e\u521d\u59cb\u5316\uff09\uff0c\u5c31\u80fd\u907f\u5f00\u5927\u90e8\u5206\u5751\uff5e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5927\u5bb6\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u9047\u5230 static \u76f8\u5173\u7684\u95ee\u9898\uff0c\u6216\u8005\u6709\u66f4\u597d\u7684\u4f7f\u7528\u6280\u5de7\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u4ea4\u6d41\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e91\u626c\uff5e \u4eca\u5929\u54b1\u4eec\u6765\u6df1\u5165\u804a\u804a Java \u4e2d\u975e\u5e38\u57fa\u7840\u4f46\u53c8\u81f3\u5173\u91cd\u8981\u7684 static \u5173\u952e\u5b57\u3002\u76f8\u4fe1\u5f88\u591a\u521a\u5165<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=1224\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":1226,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[15],"class_list":["post-1224","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1224"}],"version-history":[{"count":3,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1224\/revisions"}],"predecessor-version":[{"id":1391,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1224\/revisions\/1391"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/1226"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}