{"id":1159,"date":"2026-04-03T08:35:30","date_gmt":"2026-04-03T00:35:30","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=1159"},"modified":"2026-04-03T08:35:32","modified_gmt":"2026-04-03T00:35:32","slug":"%e3%80%90java%e3%80%91java-%e4%b8%ad%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%9a%e4%bb%8e%e5%9f%ba%e7%a1%80%e5%88%b0%e5%ae%9e%e6%88%98%e7%9a%84%e5%85%a8%e9%9d%a2%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=1159","title":{"rendered":"\u3010Java\u3011Java \u4e2d\u7684\u65b9\u6cd5\uff1a\u4ece\u57fa\u7840\u5230\u5b9e\u6218\u7684\u5168\u9762\u89e3\u6790"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e91\u626c\uff5e \u4eca\u5929\u60f3\u548c\u5927\u5bb6\u6df1\u5165\u804a\u804a Java \u4e2d\u7684\u6838\u5fc3\u6982\u5ff5 \u2014\u2014 \u65b9\u6cd5\u3002\u4f5c\u4e3a\u540e\u7aef\u5f00\u53d1\u4e2d\u9ad8\u9891\u4f7f\u7528\u7684\u77e5\u8bc6\u70b9\uff0c\u638c\u63e1\u65b9\u6cd5\u7684\u5b9a\u4e49\u3001\u58f0\u660e\u548c\u4f7f\u7528\u6280\u5de7\uff0c\u80fd\u8ba9\u6211\u4eec\u7684\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u53ef\u7ef4\u62a4\u6027\u66f4\u5f3a\u3002\u5e9f\u8bdd\u4e0d\u591a\u8bf4\uff0c\u54b1\u4eec\u76f4\u63a5\u8fdb\u5165\u6b63\u9898\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001Java \u4e2d\u7684\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b9\u6cd5\u672c\u8d28\u4e0a\u662f\u4e00\u6bb5\u5c01\u88c5\u597d\u7684\u53ef\u91cd\u7528\u4ee3\u7801\u5757\uff0c\u5b83\u5c31\u50cf\u4e00\u4e2a \u201c\u529f\u80fd\u9ed1\u76d2\u201d\uff1a\u8f93\u5165\u53c2\u6570\uff0c\u7ecf\u8fc7\u5185\u90e8\u903b\u8f91\u5904\u7406\u540e\uff0c\u8fd4\u56de\u7ed3\u679c\uff08\u6216\u65e0\u8fd4\u56de\uff09\u3002\u5b83\u7684\u6838\u5fc3\u4ef7\u503c\u4e3b\u8981\u4f53\u73b0\u5728\u4e09\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4ee3\u7801\u590d\u7528<\/strong>\uff1a\u7f16\u5199\u4e00\u6b21\uff0c\u591a\u5904\u8c03\u7528\uff0c\u907f\u514d\u91cd\u590d\u9020\u8f6e\u5b50\uff1b<\/li>\n\n\n\n<li><strong>\u63d0\u9ad8\u53ef\u8bfb\u6027<\/strong>\uff1a\u5c06\u590d\u6742\u903b\u8f91\u62c6\u5206\u5230\u4e0d\u540c\u65b9\u6cd5\u4e2d\uff0c\u4ee3\u7801\u7ed3\u6784\u66f4\u6e05\u6670\uff1b<\/li>\n\n\n\n<li><strong>\u6309\u9700\u6267\u884c<\/strong>\uff1a\u53ea\u6709\u88ab\u4e3b\u52a8\u8c03\u7528\u65f6\u624d\u4f1a\u6267\u884c\uff0c\u8282\u7701\u8d44\u6e90\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u63d0\u5230\u65b9\u6cd5\uff0cJava \u7a0b\u5e8f\u5458\u6700\u719f\u6089\u7684\u83ab\u8fc7\u4e8e<code>main()<\/code>\u65b9\u6cd5 \u2014\u2014 \u5b83\u662f\u7a0b\u5e8f\u7684\u5165\u53e3\u70b9\uff0c\u6bcf\u4e2a\u53ef\u6267\u884c\u7684 Java \u7a0b\u5e8f\u90fd\u5fc5\u987b\u5305\u542b\u5b83\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class HelloWorld {\n    \/\/ \u7a0b\u5e8f\u5165\u53e3\u65b9\u6cd5\n    public static void main(String&#91;] args) {\n        System.out.println(\"Hello, Java Methods!\");\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u5982\u4f55\u58f0\u660e\u4e00\u4e2a\u65b9\u6cd5\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b9\u6cd5\u7684\u58f0\u660e\u683c\u5f0f\u770b\u4f3c\u590d\u6742\uff0c\u5b9e\u5219\u6709\u56fa\u5b9a\u5957\u8def\uff0c\u5b8c\u6574\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26] &#91;\u8fd4\u56de\u7c7b\u578b] \u65b9\u6cd5\u540d(&#91;\u53c2\u6570\u5217\u8868]) {\n    \/\/ \u65b9\u6cd5\u4f53\uff1a\u4e1a\u52a1\u903b\u8f91\u4ee3\u7801\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u4eec\u9010\u4e2a\u62c6\u89e3\u5173\u952e\u90e8\u5206\uff0c\u5e76\u642d\u914d\u4ee3\u7801\u793a\u4f8b\u8bf4\u660e\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u63d0\u4f9b\u56db\u79cd\u8bbf\u95ee\u6743\u9650\uff0c\u63a7\u5236\u65b9\u6cd5\u7684\u53ef\u89c1\u8303\u56f4\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u4fee\u9970\u7b26<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u53ef\u89c1\u8303\u56f4<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u9002\u7528\u573a\u666f<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">public<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u6240\u6709\u7c7b<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5bf9\u5916\u63d0\u4f9b\u7684\u516c\u5171\u63a5\u53e3<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">private<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u4ec5\u5f53\u524d\u7c7b<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u7c7b\u5185\u90e8\u7684\u5de5\u5177\u65b9\u6cd5<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">protected<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u540c\u5305 \/ \u5b50\u7c7b<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u7236\u5b50\u7c7b\u4e4b\u95f4\u7684\u65b9\u6cd5\u590d\u7528<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">default<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u4ec5\u540c\u5305<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5305\u5185\u7ec4\u4ef6\u95f4\u7684\u901a\u4fe1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u4e0d\u540c\u6743\u9650\u7684\u65b9\u6cd5\u58f0\u660e<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class MethodDemo {\n    \/\/ public\u65b9\u6cd5\uff1a\u6240\u6709\u7c7b\u53ef\u8c03\u7528\n    public void publicMethod() {\n        System.out.println(\"\u8fd9\u662fpublic\u65b9\u6cd5\");\n    }\n\n    \/\/ private\u65b9\u6cd5\uff1a\u4ec5MethodDemo\u7c7b\u5185\u90e8\u53ef\u8c03\u7528\n    private int privateMethod(int a, int b) {\n        return a + b;\n    }\n\n    \/\/ protected\u65b9\u6cd5\uff1a\u540c\u5305\u6216\u5b50\u7c7b\u53ef\u8c03\u7528\n    protected String protectedMethod(String name) {\n        return \"Hello, \" + name;\n    }\n\n    \/\/ default\u65b9\u6cd5\uff1a\u4ec5\u540c\u5305\u53ef\u8c03\u7528\n    boolean defaultMethod() {\n        return true;\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u8fd4\u56de\u7c7b\u578b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b9\u6cd5\u6267\u884c\u540e\u9700\u8fd4\u56de\u6570\u636e\u65f6\uff0c\u6307\u5b9a\u8fd4\u56de\u6570\u636e\u7684\u7c7b\u578b\uff08\u57fa\u672c\u7c7b\u578b\u3001\u5bf9\u8c61\u3001\u96c6\u5408\u7b49\uff09\uff1b<\/li>\n\n\n\n<li>\u65e0\u9700\u8fd4\u56de\u6570\u636e\u65f6\uff0c\u7528<code>void<\/code>\u5173\u952e\u5b57\u6807\u8bc6\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u5e26\u8fd4\u56de\u503c\u4e0e\u65e0\u8fd4\u56de\u503c\u7684\u65b9\u6cd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class ReturnDemo {\n    \/\/ \u65e0\u8fd4\u56de\u503c\u65b9\u6cd5\uff1avoid\u6807\u8bc6\n    public void printInfo() {\n        System.out.println(\"\u65e0\u8fd4\u56de\u503c\u65b9\u6cd5\");\n    }\n\n    \/\/ \u8fd4\u56de\u57fa\u672c\u7c7b\u578b\uff08int\uff09\n    public int add(int x, int y) {\n        return x + y; \/\/ \u8fd4\u56de\u8bed\u53e5\uff1a\u7ed3\u675f\u65b9\u6cd5\u5e76\u8fd4\u56de\u7ed3\u679c\n    }\n\n    \/\/ \u8fd4\u56de\u5bf9\u8c61\u7c7b\u578b\uff08String\uff09\n    public String getUserName() {\n        return \"\u4e91\u626c\";\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u65b9\u6cd5\u540d\u4e0e\u65b9\u6cd5\u91cd\u8f7d<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u547d\u540d\u89c4\u8303\uff1a\u91c7\u7528\u5c0f\u9a7c\u5cf0\u547d\u540d\u6cd5\uff0c\u540d\u79f0\u9700\u4f53\u73b0\u65b9\u6cd5\u529f\u80fd\uff08\u5982<code>subtract<\/code>\u8868\u793a\u51cf\u6cd5\uff0c<code>getUserInfo<\/code>\u8868\u793a\u83b7\u53d6\u7528\u6237\u4fe1\u606f\uff09\uff1b<\/li>\n\n\n\n<li>\u65b9\u6cd5\u91cd\u8f7d\uff1a\u540c\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u65b9\u6cd5\u540d\u76f8\u540c\u4f46\u53c2\u6570\u5217\u8868\u4e0d\u540c\uff08\u53c2\u6570\u4e2a\u6570\u3001\u7c7b\u578b\u3001\u987a\u5e8f\u4e0d\u540c\uff09\u7684\u591a\u4e2a\u65b9\u6cd5\uff0c\u4e0e\u8fd4\u56de\u7c7b\u578b\u65e0\u5173\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u65b9\u6cd5\u91cd\u8f7d\u5b9e\u6218<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class OverloadDemo {\n    \/\/ \u4e24\u4e2aint\u7c7b\u578b\u53c2\u6570\u7684\u51cf\u6cd5\n    public int subtract(int a, int b) {\n        return a - b;\n    }\n\n    \/\/ \u4e09\u4e2aint\u7c7b\u578b\u53c2\u6570\u7684\u51cf\u6cd5\uff08\u53c2\u6570\u4e2a\u6570\u4e0d\u540c\uff09\n    public int subtract(int a, int b, int c) {\n        return a - b - c;\n    }\n\n    \/\/ \u4e24\u4e2adouble\u7c7b\u578b\u53c2\u6570\u7684\u51cf\u6cd5\uff08\u53c2\u6570\u7c7b\u578b\u4e0d\u540c\uff09\n    public double subtract(double a, double b) {\n        return a - b;\n    }\n\n    public static void main(String&#91;] args) {\n        OverloadDemo demo = new OverloadDemo();\n        System.out.println(demo.subtract(10, 3)); \/\/ \u8c03\u7528\u7b2c\u4e00\u4e2a\u65b9\u6cd5\uff0c\u8f93\u51fa7\n        System.out.println(demo.subtract(10, 3, 2)); \/\/ \u8c03\u7528\u7b2c\u4e8c\u4e2a\u65b9\u6cd5\uff0c\u8f93\u51fa5\n        System.out.println(demo.subtract(10.5, 3.2)); \/\/ \u8c03\u7528\u7b2c\u4e09\u4e2a\u65b9\u6cd5\uff0c\u8f93\u51fa7.3\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u53c2\u6570\u5217\u8868\u4e0e\u65b9\u6cd5\u7b7e\u540d<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53c2\u6570\u5217\u8868\uff1a\u5305\u542b\u53c2\u6570\u7c7b\u578b\u548c\u53c2\u6570\u540d\uff0c\u591a\u4e2a\u53c2\u6570\u7528\u9017\u53f7\u5206\u9694\uff0c\u65e0\u53c2\u6570\u65f6\u5706\u62ec\u53f7\u4e3a\u7a7a\uff1b<\/li>\n\n\n\n<li>\u65b9\u6cd5\u7b7e\u540d\uff1aJava \u4e2d\u5224\u65ad\u65b9\u6cd5\u552f\u4e00\u6027\u7684\u6807\u8bc6\uff0c\u7531<strong>\u65b9\u6cd5\u540d + \u53c2\u6570\u5217\u8868<\/strong>\u7ec4\u6210\uff08\u4e0e\u8bbf\u95ee\u6743\u9650\u3001\u8fd4\u56de\u7c7b\u578b\u65e0\u5173\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u5e26\u53c2\u6570\u4e0e\u65e0\u53c2\u6570\u7684\u65b9\u6cd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class ParameterDemo {\n    \/\/ \u65e0\u53c2\u6570\u65b9\u6cd5\n    public void showWelcome() {\n        System.out.println(\"\u6b22\u8fce\u8bbf\u95ee\u4e91\u626c\u306eBlog\uff01\");\n    }\n\n    \/\/ \u5355\u4e2a\u53c2\u6570\u65b9\u6cd5\n    public void showUserAge(int age) {\n        System.out.println(\"\u7528\u6237\u5e74\u9f84\uff1a\" + age);\n    }\n\n    \/\/ \u591a\u4e2a\u53c2\u6570\u65b9\u6cd5\n    public String createUser(String name, int age, String address) {\n        return \"\u59d3\u540d\uff1a\" + name + \"\uff0c\u5e74\u9f84\uff1a\" + age + \"\uff0c\u5730\u5740\uff1a\" + address;\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001Java \u65b9\u6cd5\u7684\u5206\u7c7b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6839\u636e\u5b9a\u4e49\u4e3b\u4f53\u4e0d\u540c\uff0cJava \u65b9\u6cd5\u53ef\u5206\u4e3a<strong>\u6807\u51c6\u7c7b\u5e93\u65b9\u6cd5<\/strong>\u548c<strong>\u7528\u6237\u81ea\u5b9a\u4e49\u65b9\u6cd5<\/strong>\uff0c\u540e\u8005\u53c8\u53ef\u7ec6\u5206\u4e3a\u5b9e\u4f8b\u65b9\u6cd5\u3001\u9759\u6001\u65b9\u6cd5\u548c\u62bd\u8c61\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u6807\u51c6\u7c7b\u5e93\u65b9\u6cd5\uff08\u5185\u7f6e\u65b9\u6cd5\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u5b98\u65b9\u63d0\u4f9b\u7684\u9884\u5148\u5b9a\u4e49\u597d\u7684\u65b9\u6cd5\uff0c\u65e0\u9700\u81ea\u5df1\u5b9e\u73b0\uff0c\u76f4\u63a5\u8c03\u7528\u5373\u53ef\uff0c\u5e38\u89c1\u4e8e<code>String<\/code>\u3001<code>System<\/code>\u7b49\u6838\u5fc3\u7c7b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class LibraryMethodDemo {\n    public static void main(String&#91;] args) {\n        String str = \"Java\u65b9\u6cd5\";\n        \n        \/\/ String\u7c7b\u7684length()\u65b9\u6cd5\uff1a\u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6\n        int length = str.length();\n        System.out.println(\"\u5b57\u7b26\u4e32\u957f\u5ea6\uff1a\" + length); \/\/ \u8f93\u51fa4\n        \n        \/\/ String\u7c7b\u7684equals()\u65b9\u6cd5\uff1a\u6bd4\u8f83\u5b57\u7b26\u4e32\u5185\u5bb9\n        boolean isEqual = str.equals(\"Java\u65b9\u6cd5\");\n        System.out.println(\"\u5185\u5bb9\u662f\u5426\u76f8\u7b49\uff1a\" + isEqual); \/\/ \u8f93\u51fatrue\n        \n        \/\/ System\u7c7b\u7684println()\u65b9\u6cd5\uff1a\u63a7\u5236\u53f0\u6253\u5370\n        System.out.println(\"\u8c03\u7528\u6807\u51c6\u7c7b\u5e93\u65b9\u6cd5\u6210\u529f\uff01\");\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u7528\u6237\u81ea\u5b9a\u4e49\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u5185\u7f6e\u65b9\u6cd5\u65e0\u6cd5\u6ee1\u8db3\u9700\u6c42\u65f6\uff0c\u81ea\u5df1\u7f16\u5199\u7684\u65b9\u6cd5\uff0c\u6839\u636e\u662f\u5426\u6709<code>static<\/code>\u4fee\u9970\uff0c\u5206\u4e3a\u5b9e\u4f8b\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\uff081\uff09\u5b9e\u4f8b\u65b9\u6cd5<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e0<code>static<\/code>\u4fee\u9970\uff0c\u5c5e\u4e8e\u7c7b\u7684\u5b9e\u4f8b\uff08\u5bf9\u8c61\uff09\uff0c\u5fc5\u987b\u521b\u5efa\u5bf9\u8c61\u540e\u624d\u80fd\u8c03\u7528\uff1b<\/li>\n\n\n\n<li>\u5e38\u7528\u573a\u666f\uff1a\u64cd\u4f5c\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\uff0c\u5982 getter\/setter \u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u5b9e\u4f8b\u65b9\u6cd5\u4e0e getter\/setter \u5b9e\u6218<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Student {\n    \/\/ \u6210\u5458\u53d8\u91cf\uff08\u79c1\u6709\uff0c\u901a\u8fc7getter\/setter\u8bbf\u95ee\uff09\n    private String name;\n    private int score;\n\n    \/\/ setter\u65b9\u6cd5\uff1a\u8bbe\u7f6e\u6210\u5458\u53d8\u91cf\u503c\n    public void setName(String name) {\n        this.name = name; \/\/ this\u6307\u4ee3\u5f53\u524d\u5bf9\u8c61\n    }\n\n    public void setScore(int score) {\n        \/\/ \u903b\u8f91\u6821\u9a8c\uff1a\u5206\u6570\u9700\u57280-100\u4e4b\u95f4\n        if (score &gt;= 0 &amp;&amp; score 100) {\n            this.score = score;\n        } else {\n            System.out.println(\"\u5206\u6570\u8f93\u5165\u65e0\u6548\uff01\");\n        }\n    }\n\n    \/\/ getter\u65b9\u6cd5\uff1a\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u503c\n    public String getName() {\n        return this.name;\n    }\n\n    public int getScore() {\n        return this.score;\n    }\n\n    \/\/ \u81ea\u5b9a\u4e49\u5b9e\u4f8b\u65b9\u6cd5\uff1a\u8ba1\u7b97\u6210\u7ee9\u7b49\u7ea7\n    public String getGrade() {\n        if (score &gt;= 90) {\n            return \"A\";\n        } else if (score &gt;= 80) {\n            return \"B\";\n        } else if (score &gt;= 60) {\n            return \"C\";\n        } else {\n            return \"D\";\n        }\n    }\n\n    public static void main(String&#91;] args) {\n        \/\/ 1. \u521b\u5efaStudent\u5bf9\u8c61\uff08\u5b9e\u4f8b\uff09\n        Student student = new Student();\n        \n        \/\/ 2. \u8c03\u7528setter\u65b9\u6cd5\u8bbe\u7f6e\u503c\n        student.setName(\"\u5c0f\u660e\");\n        student.setScore(85);\n        \n        \/\/ 3. \u8c03\u7528getter\u65b9\u6cd5\u83b7\u53d6\u503c\n        System.out.println(\"\u59d3\u540d\uff1a\" + student.getName()); \/\/ \u8f93\u51fa\"\u5c0f\u660e\"\n        System.out.println(\"\u5206\u6570\uff1a\" + student.getScore()); \/\/ \u8f93\u51fa85\n        \n        \/\/ 4. \u8c03\u7528\u81ea\u5b9a\u4e49\u5b9e\u4f8b\u65b9\u6cd5\n        System.out.println(\"\u6210\u7ee9\u7b49\u7ea7\uff1a\" + student.getGrade()); \/\/ \u8f93\u51fa\"B\"\n    }\n}\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\uff082\uff09\u9759\u6001\u65b9\u6cd5<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6709<code>static<\/code>\u4fee\u9970\uff0c\u5c5e\u4e8e\u7c7b\u672c\u8eab\uff0c\u65e0\u9700\u521b\u5efa\u5bf9\u8c61\uff0c\u76f4\u63a5\u901a\u8fc7 \u201c\u7c7b\u540d.\u65b9\u6cd5\u540d\u201d \u8c03\u7528\uff1b<\/li>\n\n\n\n<li>\u6ce8\u610f\u4e8b\u9879\uff1a\u9759\u6001\u65b9\u6cd5\u4e2d\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u975e\u9759\u6001\u6210\u5458\u53d8\u91cf\u548c\u5b9e\u4f8b\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u9759\u6001\u65b9\u6cd5\u7684\u5b9a\u4e49\u4e0e\u8c03\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class StaticMethodDemo {\n    \/\/ \u9759\u6001\u65b9\u6cd5\uff1a\u5de5\u5177\u7c7b\u5e38\u7528\uff08\u5982\u6570\u5b66\u8ba1\u7b97\u3001\u5b57\u7b26\u4e32\u5904\u7406\uff09\n    public static int multiply(int a, int b) {\n        return a * b;\n    }\n\n    \/\/ \u9759\u6001\u65b9\u6cd5\uff1a\u6253\u5370\u7cfb\u7edf\u4fe1\u606f\n    public static void printSystemInfo() {\n        System.out.println(\"\u7cfb\u7edf\u540d\u79f0\uff1aJava Demo\");\n        System.out.println(\"\u7248\u672c\uff1a1.0.0\");\n    }\n\n    public static void main(String&#91;] args) {\n        \/\/ \u76f4\u63a5\u901a\u8fc7\u7c7b\u540d\u8c03\u7528\u9759\u6001\u65b9\u6cd5\uff0c\u65e0\u9700\u521b\u5efa\u5bf9\u8c61\n        int result = StaticMethodDemo.multiply(5, 6);\n        System.out.println(\"\u4e58\u6cd5\u7ed3\u679c\uff1a\" + result); \/\/ \u8f93\u51fa30\n        \n        StaticMethodDemo.printSystemInfo();\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\uff083\uff09\u62bd\u8c61\u65b9\u6cd5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e0\u65b9\u6cd5\u4f53\uff08\u4ec5\u58f0\u660e\uff0c\u65e0\u82b1\u62ec\u53f7\u5305\u88f9\u7684\u903b\u8f91\uff09\uff0c\u7528<code>abstract<\/code>\u5173\u952e\u5b57\u4fee\u9970\uff1b<\/li>\n\n\n\n<li>\u5fc5\u987b\u58f0\u660e\u5728\u62bd\u8c61\u7c7b\uff08<code>abstract class<\/code>\uff09\u4e2d\uff0c\u5b50\u7c7b\u7ee7\u627f\u62bd\u8c61\u7c7b\u540e\uff0c\u5fc5\u987b\u91cd\u5199\u6240\u6709\u62bd\u8c61\u65b9\u6cd5\uff08\u9664\u975e\u5b50\u7c7b\u4e5f\u662f\u62bd\u8c61\u7c7b\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u62bd\u8c61\u65b9\u6cd5\u4e0e\u62bd\u8c61\u7c7b\u5b9e\u6218<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u62bd\u8c61\u7c7b\uff1a\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u7684\u7c7b\u5fc5\u987b\u58f0\u660e\u4e3a\u62bd\u8c61\u7c7b\nabstract class Shape {\n    \/\/ \u62bd\u8c61\u65b9\u6cd5\uff1a\u65e0\u65b9\u6cd5\u4f53\uff0c\u4ec5\u5b9a\u4e49\u65b9\u6cd5\u7b7e\u540d\n    public abstract double calculateArea();\n    public abstract double calculatePerimeter();\n}\n\n\/\/ \u5b50\u7c7b\u7ee7\u627f\u62bd\u8c61\u7c7b\uff0c\u5fc5\u987b\u91cd\u5199\u6240\u6709\u62bd\u8c61\u65b9\u6cd5\nclass Circle extends Shape {\n    private double radius; \/\/ \u534a\u5f84\n\n    public Circle(double radius) {\n        this.radius = radius;\n    }\n\n    \/\/ \u91cd\u5199\u62bd\u8c61\u65b9\u6cd5\uff1a\u8ba1\u7b97\u5706\u7684\u9762\u79ef\n    @Override\n    public double calculateArea() {\n        return Math.PI * radius * radius;\n    }\n\n    \/\/ \u91cd\u5199\u62bd\u8c61\u65b9\u6cd5\uff1a\u8ba1\u7b97\u5706\u7684\u5468\u957f\n    @Override\n    public double calculatePerimeter() {\n        return 2 * Math.PI * radius;\n    }\n}\n\npublic class AbstractMethodDemo {\n    public static void main(String&#91;] args) {\n        Shape circle = new Circle(5);\n        System.out.println(\"\u5706\u7684\u9762\u79ef\uff1a\" + circle.calculateArea()); \/\/ \u8f93\u51fa\u224878.54\n        System.out.println(\"\u5706\u7684\u5468\u957f\uff1a\" + circle.calculatePerimeter()); \/\/ \u8f93\u51fa\u224831.42\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u65b9\u6cd5\u662f\u4ee3\u7801\u7ec4\u7ec7\u7684\u6838\u5fc3\uff0c\u638c\u63e1\u5b83\u7684\u5173\u952e\u5728\u4e8e\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7406\u89e3\u65b9\u6cd5\u7684\u6838\u5fc3\u4ef7\u503c\uff1a\u590d\u7528\u3001\u53ef\u8bfb\u6027\u3001\u6309\u9700\u6267\u884c\uff1b<\/li>\n\n\n\n<li>\u7262\u8bb0\u65b9\u6cd5\u58f0\u660e\u7684\u5b8c\u6574\u7ed3\u6784\uff0c\u5c24\u5176\u662f\u8bbf\u95ee\u6743\u9650\u3001\u8fd4\u56de\u7c7b\u578b\u548c\u53c2\u6570\u5217\u8868\u7684\u7528\u6cd5\uff1b<\/li>\n\n\n\n<li>\u533a\u5206\u4e0d\u540c\u7c7b\u578b\u7684\u65b9\u6cd5\uff08\u5b9e\u4f8b\u65b9\u6cd5\u3001\u9759\u6001\u65b9\u6cd5\u3001\u62bd\u8c61\u65b9\u6cd5\uff09\u7684\u9002\u7528\u573a\u666f\uff1b<\/li>\n\n\n\n<li>\u7075\u6d3b\u8fd0\u7528\u65b9\u6cd5\u91cd\u8f7d\uff0c\u63d0\u5347\u4ee3\u7801\u7684\u7075\u6d3b\u6027\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e0c\u671b\u8fd9\u7bc7\u6587\u7ae0\u80fd\u5e2e\u52a9\u5927\u5bb6\u7406\u6e05 Java \u65b9\u6cd5\u7684\u77e5\u8bc6\u70b9\uff5e \u5982\u679c\u4f60\u6709\u66f4\u591a\u7591\u95ee\u6216\u5b9e\u6218\u7ecf\u9a8c\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u4ea4\u6d41\uff01\u540e\u7eed\u6211\u8fd8\u4f1a\u5206\u4eab\u66f4\u591a Java \u6838\u5fc3\u6280\u672f\uff0c\u8bb0\u5f97\u5173\u6ce8\u4e91\u626c\u306e Blog \u54e6\uff5e<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e91\u626c\uff5e \u4eca\u5929\u60f3\u548c\u5927\u5bb6\u6df1\u5165\u804a\u804a Java \u4e2d\u7684\u6838\u5fc3\u6982\u5ff5 \u2014\u2014 \u65b9\u6cd5\u3002\u4f5c\u4e3a\u540e\u7aef\u5f00\u53d1\u4e2d\u9ad8\u9891\u4f7f\u7528\u7684\u77e5\u8bc6\u70b9\uff0c<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=1159\" 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":1162,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[15],"class_list":["post-1159","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\/1159","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=1159"}],"version-history":[{"count":3,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1159\/revisions"}],"predecessor-version":[{"id":1294,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1159\/revisions\/1294"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/1162"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}