{"id":116,"date":"2025-11-07T16:34:23","date_gmt":"2025-11-07T08:34:23","guid":{"rendered":"https:\/\/www.5hy-blog.top\/?p=116"},"modified":"2025-11-07T17:02:33","modified_gmt":"2025-11-07T09:02:33","slug":"java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e5%9f%ba%e7%a1%80%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"https:\/\/www.5hy-blog.top\/index.php\/2025\/11\/07\/java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e5%9f%ba%e7%a1%80%e6%80%bb%e7%bb%93\/","title":{"rendered":"JAVA\u9762\u5411\u5bf9\u8c61(\u57fa\u7840\u603b\u7ed3)"},"content":{"rendered":"\n

\u65b9\u6cd5<\/h1>\n\n\n\n

\u65b9\u6cd5\u7684\u4f7f\u7528<\/h2>\n\n\n\n

1.\u6982\u8ff0<\/h3>\n\n\n\n

\u62e5\u6709\u529f\u80fd\u6027\u4ee3\u7801\u7684\u4ee3\u7801\u5757,\u6211\u4eec\u5c06\u6765\u4e00\u4e2a\u529f\u80fd\u5c31\u5e94\u8be5\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5
\u5c06\u6765\u5f00\u53d1\u4e00\u4e2a\u529f\u80fd\u5c31\u5e94\u8be5\u5bf9\u5e94\u641e\u4e00\u4e2a\u65b9\u6cd5,\u800c\u4e0d\u662f\u5c06\u6240\u6709\u7684\u529f\u80fd\u76f8\u5173\u4ee3\u7801\u653e\u5728\u4e00\u4e2a\u65b9\u6cd5\u4e2d
\u5230\u65f6\u5019\u6267\u884c\u54ea\u4e2a\u529f\u80fd\u5c31\u5355\u72ec\u8c03\u7528\u54ea\u4e2a\u65b9\u6cd5<\/p>\n\n\n\n

2.\u65b9\u6cd5\u5b9a\u4e49\u5404\u90e8\u5206\u89e3\u91ca:<\/h3>\n\n\n\n
1.\u65b9\u6cd5\u7684\u901a\u7528\u5b9a\u4e49\u683c\u5f0f:\n  \u4fee\u9970\u7b26 \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d(\u53c2\u6570){\n      \u65b9\u6cd5\u4f53\n      return \u7ed3\u679c\n  } \n\n2.\u5404\u90e8\u5206\u89e3\u91ca:\n  a.\u4fee\u9970\u7b26: \u56fa\u5b9a\u4e3apublic static\n  b.\u8fd4\u56de\u503c\u7c7b\u578b: \u65b9\u6cd5\u6267\u884c\u5b8c\u6bd5\u4e4b\u540e\u6700\u7ec8\u8fd4\u56de\u7684\u6570\u636e\u7684\u6570\u636e\u7c7b\u578b\n    \u6bd4\u5982:return 1 -> \u8fd4\u56de\u503c\u7c7b\u578b\u4e3aint\n        return 2.5 -> \u8fd4\u56de\u503c\u7c7b\u578b\u4e3adouble\n        return \"5hysec\" -> \u8fd4\u56de\u503c\u7c7b\u578b\u4e3aString\n  c.\u65b9\u6cd5\u540d:\u7ed9\u65b9\u6cd5\u53d6\u7684\u540d\u5b57 -> \u89c1\u540d\u77e5\u610f\n  d.\u53c2\u6570:\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d,\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d -> \u7528\u4e8e\u63a5\u6536\u522b\u4eba\u4f20\u9012\u8fc7\u6765\u7684\u6570\u636e\n  e.\u65b9\u6cd5\u4f53:\u5b9e\u73b0\u8fd9\u4e2a\u65b9\u6cd5\u7684\u5177\u4f53\u4ee3\u7801\n  f.return \u7ed3\u679c -> \u65b9\u6cd5\u8fd0\u884c\u4e4b\u540e\u6700\u7ec8\u7684\u7ed3\u679c,\u5c06\u5176\u8fd4\u56de -> \u8fd4\u56de\u503c<\/code><\/pre>\n\n\n\n
3.\u5728\u901a\u7528\u683c\u5f0f\u7684\u57fa\u7840\u4e0a,\u5206\u6210\u56db\u79cd\u65b9\u6cd5<\/h3>\n\n\n\n
\/\/\u65e0\u53c2\u65e0\u8fd4\u56de\u503c\u65b9\u6cd5\u5b9a\u4e49\u548c\u8c03\u7528
1.\u683c\u5f0f:
  public static void \u65b9\u6cd5\u540d(){
      \u65b9\u6cd5\u4f53
  }
2.\u6ce8\u610f:
  void\u5173\u952e\u5b57\u4ee3\u8868\u7684\u662f\u65e0\u8fd4\u56de\u503c,\u5982\u679c\u6b64\u65b9\u6cd5\u6ca1\u6709\u8fd4\u56de\u503c,\u8fd4\u56de\u503c\u7c7b\u578b\u4e0a\u5199void,\u5c31\u4e0d\u8981\u5199\u5177\u4f53\u7684\u8fd4\u56de\u503c\u6570\u636e\u7c7b\u578b\u4e86
      
3.\u8c03\u7528:
  \u5728\u5176\u4ed6\u65b9\u6cd5\u4e2d:\u65b9\u6cd5\u540d();<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\/\/\u6709\u53c2\u6570\u65e0\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\u5b9a\u4e49\u548c\u6267\u884c\u6d41\u7a0b
1.\u683c\u5f0f:
  public static void \u65b9\u6cd5\u540d(\u53c2\u6570){
      \u65b9\u6cd5\u4f53
  }

2.\u76f4\u63a5\u8c03\u7528:
  \u65b9\u6cd5\u540d(\u5177\u4f53\u5f97\u503c)<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

\/\/\u65e0\u53c2\u6570\u6709\u8fd4\u56de\u503c\u5b9a\u4e49\u4ee5\u53ca\u6267\u884c\u6d41\u7a0b
1.\u683c\u5f0f: 
  public static \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d(){
      \u65b9\u6cd5\u4f53
      return \u7ed3\u679c
  }

2.\u8c03\u7528:
  a.\u8d4b\u503c\u8c03\u7528: \u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d = \u65b9\u6cd5\u540d()  -> \u63a8\u8350\u4f7f\u7528
  b.\u6253\u5370\u8c03\u7528: sout(\u65b9\u6cd5\u540d()) -> \u4e0d\u63a8\u8350\u4f7f\u7528<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\/\/\u6709\u53c2\u6570\u6709\u8fd4\u56de\u503c\u5b9a\u4e49\u4ee5\u53ca\u6267\u884c\u6d41\u7a0b<\/p>\n\n\n\n
1.\u683c\u5f0f:
public static \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d(\u53c2\u6570){
      \u65b9\u6cd5\u4f53
      return \u7ed3\u679c
}<\/p>\n\n\n\n
2.\u8c03\u7528:
a.\u8d4b\u503c\u8c03\u7528: \u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d = \u65b9\u6cd5\u540d(\u5177\u4f53\u7684\u503c)<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
4.\u5f62\u53c2\u548c\u5b9e\u53c2\u7684\u533a\u522b<\/h3>\n\n\n\n
    \n
  • \u5f62\u53c2(\u5f62\u5f0f\u53c2\u6570):\u5728\u5b9a\u4e49\u65b9\u6cd5\u7684\u65f6\u5019,\u5f62\u5f0f\u4e0a\u5b9a\u4e49\u7684\u53c2\u6570,\u6b64\u65f6\u5e76\u6ca1\u6709\u503c<\/li>\n\n\n\n
  • \u5b9e\u53c2(\u5b9e\u9645\u53c2\u6570):\u5728\u8c03\u7528\u65b9\u6cd5\u7684\u65f6\u5019,\u7ed9\u5f62\u53c2\u4f20\u9012\u7684\u5177\u4f53\u7684\u503c<\/li>\n<\/ul>\n\n\n\n
    5.\u53c2\u6570\u548c\u8fd4\u56de\u503c\u4f7f\u7528\u7684\u65f6\u673a<\/h3>\n\n\n\n
      \n
    • \u53c2\u6570:\u5f53\u60f3\u5c06\u4e00\u4e2a\u65b9\u6cd5\u4e2d\u7684\u6570\u636e\u4f20\u9012\u5230\u53e6\u5916\u4e00\u4e2a\u65b9\u6cd5\u4e2d,\u90a3\u4e48\u88ab\u8c03\u7528\u65b9\u6cd5\u9700\u8981\u5b9a\u4e49\u53c2\u6570,\u8c03\u7528\u65f6\u4f20\u9012\u60f3\u8981\u4f20\u9012\u8fc7\u53bb\u7684\u6570\u636e<\/li>\n\n\n\n
    • \u8fd4\u56de\u503c:\u8c03\u7528\u65b9\u6cd5\u65f6,\u60f3\u8981\u6b64\u65b9\u6cd5\u7684\u7ed3\u679c,\u53bb\u53c2\u4e0e\u5176\u4ed6\u64cd\u4f5c,\u90a3\u4e48\u88ab\u8c03\u7528\u7684\u65b9\u6cd5\u9700\u8981\u5c06\u81ea\u5df1\u7684\u7ed3\u679c\u8fd4\u56de<\/li>\n<\/ul>\n\n\n\n
      6.\u6ce8\u610f:<\/h3>\n\n\n\n
        \n
      • \u65b9\u6cd5\u4e0d\u8c03\u7528\u4e0d\u6267\u884c<\/li>\n\n\n\n
      • \u65b9\u6cd5\u4e4b\u95f4\u662f\u5e73\u7ea7\u5173\u7cfb,\u4e0d\u80fd\u4e92\u76f8\u5d4c\u5957<\/li>\n\n\n\n
      • \u65b9\u6cd5\u7684\u6267\u884c\u987a\u5e8f\u53ea\u548c\u8c03\u7528\u987a\u5e8f\u6709\u5173<\/li>\n\n\n\n
      • main\u65b9\u6cd5\u662fjvm\u81ea\u52a8\u8c03\u7528<\/li>\n\n\n\n
      • void\u4e0d\u80fd\u548c[return \u7ed3\u679c]\u5171\u5b58,\u4f46\u662fvoid\u80fd\u548c[return]\u5171\u5b58<\/li>\n\n\n\n
      • void:\u4ee3\u8868\u65e0\u8fd4\u56de\u503c<\/li>\n\n\n\n
      • return \u7ed3\u679c:\u4ee3\u8868\u6709\u8fd4\u56de\u503c -> \u5148\u5c06\u7ed3\u679c\u8fd4\u56de,\u7136\u540e\u7ed3\u675f\u65b9\u6cd5<\/li>\n\n\n\n
      • return:\u4ec5\u4ec5\u4ee3\u8868\u7ed3\u675f\u65b9\u6cd5,\u4e0d\u4ee3\u8868\u6709\u8fd4\u56de\u503c<\/li>\n\n\n\n
      • \u65b9\u6cd5\u7684\u8c03\u7528\u5fc5\u987b\u5b8c\u5168\u5339\u914d(\u53c2\u6570\u4e2a\u6570,\u7c7b\u578b,\u987a\u5e8f\u7b49)<\/li>\n\n\n\n
      • \u4e00\u4e2a\u65b9\u6cd5\u4e2d\u53ea\u80fd\u6709\u4e00\u4e2a\u8fd4\u56de\u503c,\u4e0d\u8981\u8fde\u7eed\u5199\u591a\u4e2areturn<\/li>\n<\/ul>\n\n\n\n
        \u65b9\u6cd5\u7684\u91cd\u8f7d(Overload)<\/h2>\n\n\n\n
        1.\u6982\u8ff0—\u65b9\u6cd5\u540d\u76f8\u540c,\u53c2\u6570\u5217\u8868\u4e0d\u540c\u7684\u65b9\u6cd5<\/h3>\n\n\n\n
        2.\u4ec0\u4e48\u53eb\u505a\u53c2\u6570\u5217\u8868\u4e0d\u540c<\/h3>\n\n\n\n
          \n
        • \u53c2\u6570\u4e2a\u6570\u4e0d\u540c<\/li>\n\n\n\n
        • \u53c2\u6570\u7c7b\u578b\u4e0d\u540c<\/li>\n\n\n\n
        • \u53c2\u6570\u987a\u5e8f\u4e0d\u540c<\/li>\n<\/ul>\n\n\n\n
          3.\u548c\u4ec0\u4e48\u65e0\u5173<\/h3>\n\n\n\n
            \n
          • \u548c\u8fd4\u56de\u503c\u65e0\u5173<\/li>\n\n\n\n
          • \u548c\u53d8\u91cf\u540d\u65e0\u5173<\/li>\n<\/ul>\n\n\n\n
            4.\u4f7f\u7528\u573a\u666f:\u529f\u80fd\u4e00\u6837,\u5b9e\u73b0\u7ec6\u8282\u4e0d\u4e00\u6837,\u5c31\u53ef\u4ee5\u5b9a\u4e49\u91cd\u8f7d\u7684\u65b9\u6cd5<\/h3>\n\n\n\n
            5.\u4f8b\u5b50<\/h3>\n\n\n\n
            1.\u9700\u6c42:\u5b9a\u4e49\u4e09\u4e2a\u65b9\u6cd5,\u5206\u522b\u6c42\u4e24\u4e2a\u6570\u7684\u548c,\u4e09\u4e2a\u6570\u7684\u548c,\u56db\u4e2a\u6570\u7684\u548c\npublic class Demo06OverLoad {\n    public static void main(String[] args) {\n         sum(10,20);\n         sum(10,20,30);\n    }\n\n    public static void sum(int a,int b){\n        int sum = a+b;\n        System.out.println(\"sum = \" + sum);\n    }\n\n    public static void sum(int a,int b,int c){\n        int sum = a+b+c;\n        System.out.println(\"sum = \" + sum);\n    }\n\n    public static void sum(int a,int b,int c,int d){\n        int sum = a+b+c+d;\n        System.out.println(\"sum = \" + sum);\n    }\n}\n<\/code><\/pre>\n\n\n\n
            \u9762\u5411\u5bf9\u8c61<\/h1>\n\n\n\n
            \u9762\u5411\u5bf9\u8c61\u4e09\u5927\u7279\u5f81:
            \u5c01\u88c5 \u7ee7\u627f \u591a\u6001<\/h2>\n\n\n\n
              \n
            1. \u4ec0\u4e48\u662f\u9762\u5411\u5bf9\u8c61\u601d\u60f3:java\u7684\u6838\u5fc3\u7f16\u7a0b\u601d\u60f3<\/li>\n\n\n\n
            2. \u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u601d\u60f3\u7f16\u7a0b:\u6709\u5f88\u591a\u529f\u80fd\u522b\u4eba\u90fd\u5199\u597d\u4e86\u6211\u4eec\u76f4\u63a5\u521b\u5efa\u8fd9\u4e2a\u5bf9\u8c61,\u76f4\u63a5\u62ff\u8fc7\u6765\u7528\u6211\u4eec\u7684\u529f\u80fd\u5c31\u80fd\u5b9e\u73b0 -> \u61d2-> \u4e3a\u4e86\u5c11\u5199\u4ee3\u7801<\/li>\n\n\n\n
            3. \u4ec0\u4e48\u65f6\u5019\u8981\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u601d\u60f3\u7f16\u7a0b:\u5728\u4e00\u4e2a\u7c7b\u4e2d\u60f3\u4f7f\u7528\u522b\u7684\u7c7b\u5b9e\u73b0\u597d\u7684\u529f\u80fd\u65f6,\u5c31\u9700\u8981\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u601d\u60f3\u7f16\u7a0b\u4e86<\/li>\n\n\n\n
            4. \u600e\u4e48\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u601d\u60f3\u7f16\u7a0b:\n
                \n
              • a.new\u5440,\u70b9\u5440<\/li>\n\n\n\n
              • b.\u7279\u6b8a:\u8c03\u7528\u5e26static\u5173\u952e\u5b57\u7684 -> \u76f4\u63a5\u7c7b\u540d\u70b9<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
                \u7c7b<\/h2>\n\n\n\n
                1.\u7c7b\u7684\u6982\u8ff0:\u4e00\u7c7b\u4e8b\u7269\u7684\u62bd\u8c61\u8868\u793a\u5f62\u5f0f<\/h3>\n\n\n\n
                2.\u7c7b\u7684\u5206\u7c7b<\/h3>\n\n\n\n
                a.\u5b9e\u4f53\u7c7b -> \u4e16\u95f4\u4e07\u7269\u7684\u5206\u7c7b
                b.\u6d4b\u8bd5\u7c7b -> \u5e26main\u65b9\u6cd5\u7684\u7c7b -> \u4e3a\u4e86\u6d4b\u8bd5\u4ee3\u7801\u662f\u5426\u80fd\u8dd1\u901a\u7684\u7c7b<\/p>\n\n\n\n
                3.\u5b9e\u4f53\u7c7b\u5305\u542b\u4e24\u90e8\u5206:<\/h3>\n\n\n\n
                      \u5c5e\u6027(\u8fd9\u4e2a\u5206\u7c7b\u6709\u5565)-> \u6210\u5458\u53d8\u91cf
                               a.\u5b9a\u4e49\u683c\u5f0f: \u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d
                               b.\u5b9a\u4e49\u4f4d\u7f6e: \u7c7b\u4e2d\u65b9\u6cd5\u5916
                               c.\u6210\u5458\u53d8\u91cf\u6709\u9ed8\u8ba4\u503c:
                                      \u6574\u6570 0
                                      \u5c0f\u6570 0.0
                                      \u5b57\u7b26 ‘\\u0000’
                                      \u5e03\u5c14 false
                                      \u5f15\u7528 null<\/p>\n\n\n\n
                      \u884c\u4e3a(\u8fd9\u4e2a\u5206\u7c7b\u80fd\u5e72\u5565,\u6709\u4ec0\u4e48\u529f\u80fd) -> \u6210\u5458\u65b9\u6cd5
                             \u5c06\u4e4b\u524d\u7684\u65b9\u6cd5\u5e72\u6389static\u5173\u952e\u5b57,\u5176\u4ed6\u7684\u4e00\u6837<\/p>\n\n\n\n
                public class Person {\n    \/\/\u5c5e\u6027 -> \u6210\u5458\u53d8\u91cf\n    String name;\n    int age;\n\n    \/\/\u884c\u4e3a -> \u6210\u5458\u65b9\u6cd5\n    public void eat(){\n        System.out.println(\"\u4eba\u8981\u5403\u996d\");\n    }\n\n    public void drink(){\n        System.out.println(\"\u4eba\u8981\u559d\u6c34\");\n    }\n\n    public void la(){\n        System.out.println(\"\u4eba\u8981\u51fa\u606d\");\n    }\n\n    public void sa(){\n        System.out.println(\"\u4eba\u8981\u5618\u5618\");\n    }\n}\n<\/code><\/pre>\n\n\n\n
                \u5bf9\u8c61<\/h2>\n\n\n\n
                1.\u6982\u8ff0:\u4e00\u7c7b\u4e8b\u7269\u7684\u5177\u4f53\u4f53\u73b0<\/p>\n\n\n\n
                2.\u4f7f\u7528:<\/h3>\n\n\n\n
                a.\u5bfc\u5305:import \u5305\u540d.\u7c7b\u540d
                    \u5982\u679c\u4e24\u4e2a\u7c7b\u4e0d\u5728\u540c\u4e00\u4e2a\u5305\u4e0b,\u4f7f\u7528\u5bf9\u65b9\u7684\u6210\u5458\u5c31\u9700\u8981\u5bfc\u5305
                    \u5982\u679c\u4e24\u4e2a\u7c7b\u5728\u540c\u4e00\u4e2a\u5305\u4e0b,\u4f7f\u7528\u5bf9\u65b9\u7684\u6210\u5458\u5c31\u4e0d\u9700\u8981\u5bfc\u5305<\/p>\n\n\n\n
                b.\u521b\u5efa\u5bf9\u8c61:\u60f3\u8981\u8c03\u7528\u54ea\u4e2a\u7c7b\u7684\u6210\u5458,\u5c31new\u54ea\u4e2a\u7c7b\u7684\u5bf9\u8c61
                         \u7c7b\u540d \u5bf9\u8c61\u540d = new \u7c7b\u540d()<\/p>\n\n\n\n
                c.\u8c03\u7528\u6210\u5458(\u6210\u5458\u65b9\u6cd5,\u6210\u5458\u53d8\u91cf)
                        \u5bf9\u8c61\u540d.\u6210\u5458\u53d8\u91cf\u540d = \u503c
                        \u5bf9\u8c61\u540d.\u65b9\u6cd5\u540d()<\/p>\n\n\n\n
                public class Person {\n    \/\/\u5c5e\u6027 -> \u6210\u5458\u53d8\u91cf\n    String name;\n    int age;\n\n    \/\/\u884c\u4e3a -> \u6210\u5458\u65b9\u6cd5\n    public void eat(){\n        System.out.println(\"\u4eba\u8981\u5403\u996d\");\n    }\n\n    public void drink(){\n        System.out.println(\"\u4eba\u8981\u559d\u6c34\");\n    }\n\n    public void la(){\n        System.out.println(\"\u4eba\u8981\u51fa\u606d\");\n    }\n\n    public void sa(){\n        System.out.println(\"\u4eba\u8981\u5618\u5618\");\n    }\n}<\/code><\/pre>\n\n\n\n
                public class Demo02Object {\n    public static void main(String[] args) {\n        Person person = new Person();\n        System.out.println(person.name);\n        System.out.println(person.age);\n\n        person.name = \"\u6d9b\u54e5\";\n        person.age = 18;\n        System.out.println(person.name);\n        System.out.println(person.age);\n\n        person.eat();\n        person.drink();\n        person.la();\n        person.sa();\n    }\n}\n<\/code><\/pre>\n\n\n\n
                3.\u533f\u540d\u5bf9\u8c61\u7684\u4f7f\u7528<\/h3>\n\n\n\n
                1.\u533f\u540d\u5bf9\u8c61:<\/h4>\n\n\n\n
                new\u5bf9\u8c61\u7684\u65f6\u5019,\u6ca1\u6709\u7b49\u53f7\u5de6\u8fb9,\u53ea\u6709\u7b49\u53f7\u53f3\u8fb9\u7684new\u5bf9\u8c61\u90e8\u5206
                \u6709\u540d\u5bf9\u8c61:Person p = new Person()
                \u533f\u540d\u5bf9\u8c61:new Person()<\/p>\n\n\n\n
                2.\u4f7f\u7528:<\/h4>\n\n\n\n
                new Person().\u6210\u5458\u540d<\/p>\n\n\n\n
                3.\u4f18\u7f3a\u70b9:<\/h4>\n\n\n\n
                a.\u4f18\u70b9:\u597d\u4f7f\u7528
                b.\u7f3a\u70b9\u5927\u5927\u7684:\u5bf9\u8c61\u4e0d\u80fd\u5faa\u73af\u4f7f\u7528,\u6d6a\u8d39\u5185\u5b58<\/p>\n\n\n\n
                4.\u6ce8\u610f:<\/h4>\n\n\n\n
                a.\u5982\u679c\u6211\u4eec\u60f3\u4e34\u65f6\u7684\u8c03\u7528\u4e00\u6b21\u65b9\u6cd5,\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u533f\u540d\u5bf9\u8c61
                b.\u4f46\u662f\u5982\u679c\u6d89\u53ca\u5230\u8d4b\u503c,\u5343\u4e07\u4e0d\u8981\u4f7f\u7528<\/p>\n\n\n\n
                public class Demo01 {\n    public static void main(String[] args) {\n        \/\/\u6709\u540d\u5bf9\u8c61\n        Person p = new Person();\n        p.eat();\n        p.drink();\n\n        System.out.println(\"=================\");\n\n        \/\/\u533f\u540d\u5bf9\u8c61\n        new Person().eat();\n        new Person().drink();\n    }\n}<\/code><\/pre>\n\n\n\n
                \"\"<\/div><\/figure>\n\n\n\n
                \u6210\u5458\u53d8\u91cf\u548c\u5c40\u90e8\u53d8\u91cf\u533a\u522b<\/h2>\n\n\n\n
                1.\u5b9a\u4e49\u4f4d\u7f6e\u4e0d\u540c:
                a.\u6210\u5458\u53d8\u91cf:\u7c7b\u4e2d\u65b9\u6cd5\u5916
                b.\u5c40\u90e8\u53d8\u91cf:\u65b9\u6cd5\u5185\u90e8,\u6216\u8005\u53c2\u6570\u4f4d\u7f6e\u4e0a
                2.\u521d\u59cb\u5316\u503c\u4e0d\u540c:
                a.\u6210\u5458\u53d8\u91cf:\u662f\u6709\u9ed8\u8ba4\u503c\u7684,\u4e0d\u9700\u8981\u8d4b\u503c\u5c31\u80fd\u76f4\u63a5\u4f7f\u7528
                b.\u5c40\u90e8\u53d8\u91cf:\u6ca1\u6709\u9ed8\u8ba4\u503c\u7684,\u5fc5\u987b\u5148\u521d\u59cb\u5316\u624d\u80fd\u4f7f\u7528
                3.\u4f5c\u7528\u8303\u56f4\u4e0d\u540c:
                a.\u6210\u5458\u53d8\u91cf:\u4f5c\u7528\u4e8e\u6574\u4e2a\u7c7b
                b.\u5c40\u90e8\u53d8\u91cf:\u53ea\u4f5c\u7528\u4e8e\u81ea\u5df1\u6240\u5728\u7684\u65b9\u6cd5\u5185\u90e8
                4.\u5185\u5b58\u4f4d\u7f6e\u4e0d\u540c:
                a.\u6210\u5458\u53d8\u91cf:\u5728\u5806\u4e2d,\u56e0\u4e3a\u6210\u5458\u53d8\u91cf\u8ddf\u7740\u5bf9\u8c61\u8d70
                b.\u5c40\u90e8\u53d8\u91cf:\u5728\u6808\u4e2d,\u56e0\u4e3a\u5c40\u90e8\u53d8\u91cf\u8ddf\u7740\u65b9\u6cd5\u8d70
                5.\u751f\u547d\u5468\u671f\u4e0d\u540c:
                a.\u6210\u5458\u53d8\u91cf:\u968f\u7740\u5bf9\u8c61\u7684\u521b\u5efa\u800c\u521b\u5efa,\u968f\u7740\u5bf9\u8c61\u7684\u6d88\u5931\u800c\u6d88\u5931
                b.\u5c40\u90e8\u53d8\u91cf:\u968f\u7740\u65b9\u6cd5\u7684\u6267\u884c\u800c\u521b\u5efa,\u968f\u7740\u65b9\u6cd5\u7684\u5f39\u6808\u800c\u6d88\u5931<\/p>\n\n\n\n
                public class Person {\n    String name;\/\/\u6210\u5458\u53d8\u91cf\n\n    public void eat(){\n        \/\/\u5c40\u90e8\u53d8\u91cf\n        int i = 10;\n        System.out.println(i);\n\n        int j;\n        \/\/System.out.println(\"j = \" + j);\n\n        System.out.println(name);\n    }\n\n    public void drink(){\n        System.out.println(name);\n        \/\/System.out.println(i);\n    }\n}<\/code><\/pre>\n\n\n\n
                \u5c01\u88c5<\/h2>\n\n\n\n
                1.\u5c01\u88c5\u7684\u4ecb\u7ecd\u53ca\u4f7f\u7528<\/h3>\n\n\n\n
                1).\u5c01\u88c5\u600e\u4e48\u7528:<\/h4>\n\n\n\n
                a.\u5c06\u4ee3\u7801\u653e\u5230\u4e00\u4e2a\u65b9\u6cd5\u4e2d,\u65b9\u6cd5\u4f53\u5c31\u662f\u6211\u4eec\u9690\u85cf\u8d77\u6765\u7684\u7ec6\u8282,\u65b9\u6cd5\u540d\u5c31\u662f\u5bf9\u5916\u63d0\u4f9b\u7684\u516c\u5171\u63a5\u53e3 -> \u6211\u4eec\u76f4\u63a5\u901a\u8fc7\u8c03\u7528\u65b9\u6cd5\u540d,\u65b9\u6cd5\u5185\u90e8\u7684\u7ec6\u8282\u5c31\u6267\u884c\u4e86,\u81f3\u4e8e\u8fd9\u4e2a\u65b9\u6cd5\u600e\u4e48\u5b9e\u73b0\u7684,\u6211\u4eec\u65e0\u9700\u5173\u6ce8,\u6211\u4eec\u53ea\u5173\u6ce8\u8c03\u7528\u65b9\u6cd5<\/p>\n\n\n\n
                b.\u5c06\u6210\u5458\u79c1\u6709\u5316 -> private
                private -> \u4ee3\u8868\u7684\u662f\u79c1\u6709\u7684,\u88ab\u79c1\u6709\u5316\u7684\u6210\u5458\u53ea\u80fd\u5728\u81ea\u5df1\u5f53\u524d\u7c7b\u4e2d\u4f7f\u7528<\/p>\n\n\n\n
                private\u53ef\u4ee5\u4fee\u9970\u6210\u5458\u53d8\u91cf,\u4e5f\u53ef\u4ee5\u4fee\u9970\u65b9\u6cd5<\/p>\n\n\n\n
                2).\u5c01\u88c5\u603b\u7ed3\u4e00\u53e5\u8bdd:\u5c06\u7ec6\u8282\u9690\u85cf\u8d77\u6765(\u4e0d\u8ba9\u5916\u754c\u76f4\u63a5\u4f7f\u7528),\u5bf9\u5916\u63d0\u4f9b\u4e00\u5957\u516c\u5171\u7684\u63a5\u53e3(\u4f9b\u5916\u754c\u901a\u8fc7\u8fd9\u4e2a\u516c\u5171\u7684\u63a5\u53e3\u95f4\u63a5\u4f7f\u7528\u9690\u85cf\u8d77\u6765\u7684\u7ec6\u8282)<\/h4>\n\n\n\n
                (1).\u7528private\u4fee\u9970\u6210\u5458\u4e4b\u540e(\u76f8\u5f53\u4e8e\u9690\u85cf\u7ec6\u8282)\n(2).\u63d0\u4f9bgetxxx\/setxxx\u65b9\u6cd5(\u76f8\u5f53\u4e8e\u5bf9\u5916\u63d0\u4f9b\u7684\u516c\u5171\u63a5\u53e3)\n  a.setxxx:\u4e3a\u5c5e\u6027\u8d4b\u503c\n  b.getxxx:\u83b7\u53d6\u5c5e\u6027\u503c<\/code><\/pre>\n\n\n\n
                public class Person {\n    private String name;\n    private int age;\n\n    \/**\n     * \u9488\u5bf9\u79c1\u6709\u5316\u7684name\u63d0\u4f9bgetxxx\/setxxx\u65b9\u6cd5\n     *\/\n    public void setName(String xingMing) {\n        name = xingMing;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setAge(int nianLing) {\n        if (nianLing <= 0) {\n            System.out.println(\"\u5e74\u9f84\u4e0d\u5408\u6cd5\");\n        } else {\n            age = nianLing;\n        }\n    }\n\n    public int getAge() {\n        return age;\n    }\n}\n<\/code><\/pre>\n\n\n\n
                public class Test01 {\n    public static void main(String[] args) {\n        Person person = new Person();\n        \/\/person.name = \"\u840c\u59d0\";\n        \/\/person.age = 38;\n        \/\/System.out.println(person.name);\n        \/\/System.out.println(person.age);\n        person.setName(\"\u840c\u59d0\");\n        person.setAge(-38);\n\n        String name = person.getName();\n        int age = person.getAge();\n        System.out.println(name+\"...\"+age);\n\n    }\n}\n<\/code><\/pre>\n\n\n\n
                \"\"<\/div><\/figure>\n\n\n\n
                2.this\u7684\u4ecb\u7ecd<\/h3>\n\n\n\n
                1.\u6ce8\u610f:\u5f53\u6210\u5458\u53d8\u91cf\u548c\u5c40\u90e8\u53d8\u91cf\u91cd\u540d\u7684\u65f6\u5019,\u9075\u5faa”\u5c31\u8fd1\u539f\u5219”,\u5148\u8d70\u5c40\u90e8\u53d8\u91cf
                2.this\u5173\u952e\u5b57:
                a.\u6982\u8ff0:\u4ee3\u8868\u7684\u662f\u5f53\u524d\u5bf9\u8c61
                b.\u7528\u6cd5:this.\u6210\u5458\u7684
                3.this\u4ee3\u8868\u7684\u662f\u5f53\u524d\u5bf9\u8c61,\u5177\u4f53\u4ee3\u8868\u54ea\u4e2a\u5f53\u524d\u5bf9\u8c61\u5462?
                \u54ea\u4e2a\u5bf9\u8c61\u8c03\u7528\u7684this\u6240\u5728\u7684\u65b9\u6cd5,this\u5c31\u4ee3\u8868\u54ea\u4e2a\u5bf9\u8c61<\/p>\n\n\n\n
                public class Person {\n     String name;\n     public void speak(String name){\n         System.out.println(this+\"...............\");\n         System.out.println(this.name+\"\u60a8\u597d,\u6211\u662f\"+name);\n     }\n}\n<\/code><\/pre>\n\n\n\n
                public class Test01 {\n    public static void main(String[] args) {\n        Person person = new Person();\n        System.out.println(person+\"...\");\n        person.name = \"\u6c89\u9999\";\n        person.speak(\"\u5218\u5f66\u660c\");\n\n        System.out.println(\"====================\");\n\n        Person person2 = new Person();\n        System.out.println(person2+\"......\");\n        person2.name = \"\u738b\u601d\u806a\";\n        person2.speak(\"\u738b\u5065\u6797\");\n    }\n}\n<\/code><\/pre>\n\n\n\n
                \"\"<\/div><\/figure>\n\n\n\n
                public class Person {\n    private String name;\n    private int age;\n\n    \/\/\u4e3aname\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    \/\/\u4e3aage\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    public int getAge() {\n        return age;\n    }\n}<\/code><\/pre>\n\n\n\n
                public class Test01 {\n    public static void main(String[] args) {\n        Person person1 = new Person();\n        person1.setName(\"\u840c\u59d0\");\n        person1.setAge(48);\n        System.out.println(person1.getName()+\"...\"+person1.getAge());\n\n        System.out.println(\"=================================\");\n\n        Person person2 = new Person();\n        person2.setName(\"\u6d9b\u54e5\");\n        person2.setAge(18);\n        System.out.println(person2.getName()+\"...\"+person2.getAge());\n    }\n}<\/code><\/pre>\n\n\n\n
                \"\"<\/div><\/figure>\n\n\n\n
                3.\u6784\u9020\u65b9\u6cd5<\/h3>\n\n\n\n
                1.\u6784\u9020\u65b9\u6cd5\u4f5c\u7528:\u4e3b\u8981\u662fnew\u5bf9\u8c61\u7684<\/h4>\n\n\n\n
                2.\u7279\u70b9:<\/h4>\n\n\n\n
                a.\u65b9\u6cd5\u540d\u548c\u7c7b\u540d\u4e00\u81f4
                b.\u6ca1\u6709\u8fd4\u56de\u503c,\u8fdevoid\u90fd\u6ca1\u6709<\/p>\n\n\n\n
                3.\u7a7a\u53c2\u6784\u9020<\/h4>\n\n\n\n
                1.\u683c\u5f0f:\n  public \u7c7b\u540d(){\n      \n  }\n\n2.\u4f5c\u7528:\n  new\u5bf9\u8c61\u4f7f\u7528\n      \n3.\u6ce8\u610f:\n  a.\u6211\u4eec\u4e00new,\u5c31\u76f8\u5f53\u4e8e\u8c03\u7528\u4e86\u6784\u9020\u65b9\u6cd5\n  b.jvm\u4f1a\u4e3a\u6bcf\u4e2a\u7c7b\u90fd\u63d0\u4f9b\u4e00\u4e2a\u7a7a\u53c2\u6784\u9020,\u4e0d\u5199\u4e5f\u6709    <\/code><\/pre>\n\n\n\n
                public class Person {\n    private String name;\n    private int age;\n\n    \/\/\u7a7a\u53c2\u6784\u9020\n    public Person(){\n        System.out.println(\"\u6211\u662f\u7a7a\u53c2\u6784\u9020\");\n    }\n\n    \/\/\u4e3aname\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    \/\/\u4e3aage\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    public int getAge() {\n        return age;\n    }\n}\n<\/code><\/pre>\n\n\n\n
                public class Test01 {\n    public static void main(String[] args) {\n        Person person1 = new Person();\n    }\n}\n<\/code><\/pre>\n\n\n\n
                \u6784\u9020\u65b9\u6cd5\u53ef\u4ee5\u662f\u5176\u4ed6\u7684\u6743\u9650\u4fee\u9970\u7b26,\u6bd4\u5982private\u4fee\u9970,\u5982\u679c\u88abprivate\u4fee\u9970\u4e86\u6784\u9020\u65b9\u6cd5,\u6211\u4eec\u5c31\u4e0d\u80fd\u5229\u7528\u6784\u9020\u65b9\u6cd5new\u5bf9\u8c61\u4e86<\/p>\n\n\n\n
                4.\u6709\u53c2\u6784\u9020<\/h4>\n\n\n\n
                1.\u683c\u5f0f:\n  public \u7c7b\u540d(\u5f62\u53c2){\n      \u4e3a\u5c5e\u6027\u8d4b\u503c\n  }\n\n2.\u4f5c\u7528:\n  a.\u521b\u5efa\u5bf9\u8c61\n  b.\u4e3a\u5c5e\u6027\u8d4b\u503c\n      \n3.\u6ce8\u610f:\n  \u5982\u679c\u5199\u4e0a\u4e86\u6709\u53c2\u6784\u9020,jvm\u5c06\u4e0d\u518d\u63d0\u4f9b\u65e0\u53c2\u6784\u9020\u4e86,\u6240\u4ee5\u5efa\u8bae\u90fd\u5199\u4e0a<\/code><\/pre>\n\n\n\n
                public class Person {\n    private String name;\n    private int age;\n\n    \/\/\u7a7a\u53c2\u6784\u9020\n    public Person(){\n        System.out.println(\"\u6211\u662f\u7a7a\u53c2\u6784\u9020\");\n    }\n\n    \/\/\u6709\u53c2\u6784\u9020\n    public Person(String name,int age){\n        this.name = name;\n        this.age = age;\n    }\n\n    \/\/\u4e3aname\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    \/\/\u4e3aage\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    public int getAge() {\n        return age;\n    }\n}\n<\/code><\/pre>\n\n\n\n
                public class Test01 {\n    public static void main(String[] args) {\n        Person person1 = new Person();\n\n        System.out.println(\"==================\");\n\n        Person person2 = new Person(\"\u5f20\u65e0\u5fcc\",25);\n        System.out.println(person2.getName());\n        System.out.println(person2.getAge());\n    }\n}<\/code><\/pre>\n\n\n\n
                \"\"<\/div><\/figure>\n\n\n\n
                5.\u6807\u51c6JavaBean<\/h4>\n\n\n\n
                JavaBean\u662f Java\u8bed\u8a00\u7f16\u5199\u7c7b\u7684\u4e00\u79cd\u6807\u51c6\u89c4\u8303\u3002\u7b26\u5408<\/code>JavaBean` \u7684\u7c7b\uff0c\u8981\u6c42\uff1a<\/p>\n\n\n\n
                  \n
                • \u7c7b\u5fc5\u987b\u662f\u5177\u4f53\u7684(\u975e\u62bd\u8c61 abstract)\u548c\u516c\u5171\u7684\uff0cpublic class \u7c7b\u540d<\/li>\n\n\n\n
                • \u5e76\u4e14\u5177\u6709\u65e0\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5<\/li>\n\n\n\n
                • \u6210\u5458\u53d8\u91cf\u79c1\u6709\u5316\uff0c\u5e76\u63d0\u4f9b\u7528\u6765\u64cd\u4f5c\u6210\u5458\u53d8\u91cf\u7684set<\/code> \u548cget<\/code> \u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n
                  public class Person {\n    private String name;\n    private int age;\n\n    \/\/\u7a7a\u53c2\u6784\u9020\n    public Person(){\n        System.out.println(\"\u6211\u662f\u7a7a\u53c2\u6784\u9020\");\n    }\n\n    \/\/\u6709\u53c2\u6784\u9020\n    public Person(String name,int age){\n        this.name = name;\n        this.age = age;\n    }\n\n    \/\/\u4e3aname\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    \/\/\u4e3aage\u5c5e\u6027\u63d0\u4f9bget\/set\u65b9\u6cd5\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    public int getAge() {\n        return age;\n    }\n}\n<\/code><\/pre>\n\n\n\n
                  \u7f16\u5199\u7b26\u5408JavaBean<\/code> \u89c4\u8303\u7684\u7c7b\uff0c\u4ee5\u5b66\u751f\u7c7b\u4e3a\u4f8b\uff0c\u6807\u51c6\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  public class Student {\n    private int id;\n    private String name;\n\n    public Student() {\n    }\n\n    public Student(int id, String name) {\n        this.id = id;\n        this.name = name;\n    }\n\n    public int getId() {\n        return id;\n    }\n\n    public void setId(int id) {\n        this.id = id;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n}<\/code><\/pre>\n\n\n\n
                  public class Test01 {\n    public static void main(String[] args) {\n        Student student = new Student();\n        student.setId(1);\n        student.setName(\"\u5f20\u4e09\");\n        System.out.println(student.getId()+\"...\"+student.getName());\n\n        System.out.println(\"=======================\");\n        Student student1 = new Student(2, \"\u674e\u56db\");\n        System.out.println(student1.getId()+\"...\"+student1.getName());\n    }\n}<\/code><\/pre>\n\n\n\n
                  static\u5173\u952e\u5b57<\/h3>\n\n\n\n
                  1.static\u7684\u4ecb\u7ecd\u4ee5\u53ca\u57fa\u672c\u4f7f\u7528<\/h4>\n\n\n\n
                  \"\"<\/div><\/figure>\n\n\n\n
                  1).\u6982\u8ff0: static\u9759\u6001\u5173\u952e\u5b57<\/h5>\n\n\n\n
                  2).\u4f7f\u7528:<\/h5>\n\n\n\n
                  a.\u4fee\u9970\u6210\u5458\u53d8\u91cf: static \u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d
                  b.\u4fee\u9970\u65b9\u6cd5:
                  \u4fee\u9970\u7b26 static \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d(\u5f62\u53c2){
                                  \u65b9\u6cd5\u4f53
                                  return \u7ed3\u679c
                  }<\/p>\n\n\n\n
                  3.static\u7684\u7279\u70b9:<\/h5>\n\n\n\n
                  a.\u9759\u6001\u6210\u5458\u5c5e\u4e8e\u7c7b\u6210\u5458,\u9759\u6001\u6210\u5458\u4f1a\u968f\u7740\u7c7b\u7684\u52a0\u8f7d\u800c\u52a0\u8f7d
                  b.\u9759\u6001\u6210\u5458\u4f1a\u4f18\u5148\u4e8e\u5bf9\u8c61\u5b58\u5728(\u975e\u9759\u6001\u6210\u5458\u5c5e\u4e8e\u5bf9\u8c61\u7684\u6210\u5458)
                  c.\u51e1\u662f\u6839\u636estatic\u6240\u5728\u7684\u7c7b\u521b\u5efa\u51fa\u6765\u7684\u5bf9\u8c61,\u90fd\u53ef\u4ee5\u5171\u4eab\u8fd9\u4e2a\u9759\u6001\u6210\u5458<\/p>\n\n\n\n
                  4.\u8c03\u7528:\u7c7b\u540d\u76f4\u63a5\u70b9<\/h5>\n\n\n\n
                  public class Student {\n    int id;\n    String name;\n    static String classRoom;\n}<\/code><\/pre>\n\n\n\n
                  public class Test01 {\n    public static void main(String[] args) {\n        \/\/\u7c7b\u540d\u76f4\u63a5\u8c03\u7528\n        Student.classRoom = \"\u6559\u7814\u5ba49\";\n\n        Student s1 = new Student();\n        s1.id = 1;\n        s1.name = \"\u5f20\u4e09\";\n        s1.classRoom = \"\u6559\u7814\u5ba490\";\n        System.out.println(s1.id);\n        System.out.println(s1.name);\n        System.out.println(s1.classRoom);\n\n        System.out.println(\"================\");\n\n        Student s2 = new Student();\n        s2.id = 2;\n        s2.name = \"\u674e\u56db\";\n        s2.classRoom = \"\u6559\u7814\u5ba4900\";\n        System.out.println(s2.id);\n        System.out.println(s2.name);\n        System.out.println(s2.classRoom);\n        \/\/System.out.println(s1.classRoom);\n    }\n}<\/code><\/pre>\n\n\n\n
                  2.static\u4fee\u9970\u6210\u5458\u7684\u8bbf\u95ee\u7279\u70b9<\/h4>\n\n\n\n
                  1.\u5728\u9759\u6001\u65b9\u6cd5\u4e2d\u80fd\u76f4\u63a5\u8bbf\u95ee\u975e\u9759\u6001\u6210\u5458\u561b?\u4e0d\u80fd
                  new\u5bf9\u8c61\u8bbf\u95ee<\/p>\n\n\n\n
                  2.\u5728\u9759\u6001\u65b9\u6cd5\u4e2d\u80fd\u76f4\u63a5\u8bbf\u95ee\u9759\u6001\u6210\u5458\u561b?\u80fd
                  a.\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d -> \u76f4\u63a5\u8c03\u7528
                  b.\u4e0d\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d -> \u7c7b\u540d\u8c03\u7528<\/p>\n\n\n\n
                  3.\u5728\u975e\u9759\u6001\u65b9\u6cd5\u4e2d\u80fd\u76f4\u63a5\u8bbf\u95ee\u9759\u6001\u6210\u5458\u561b?\u80fd
                  a.\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d -> \u76f4\u63a5\u8c03\u7528
                  b.\u4e0d\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d -> \u7c7b\u540d\u8c03\u7528<\/p>\n\n\n\n
                  4.\u5728\u975e\u9759\u6001\u65b9\u6cd5\u4e2d\u80fd\u76f4\u63a5\u8bbf\u95ee\u975e\u9759\u6001\u6210\u5458\u561b?\u80fd
                  a.\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d -> \u76f4\u63a5\u8c03\u7528
                  b.\u4e0d\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d -> new\u5bf9\u8c61\u8c03\u7528<\/p>\n\n\n\n
                  \"\"<\/div><\/figure>\n\n\n\n
                  \u603b\u7ed3:<\/p>\n\n\n\n
                  1.\u8c03\u7528\u9759\u6001\u7684:\u4e0d\u7ba1\u5728\u4e0d\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d,\u80fd\u76f4\u63a5\u8c03\u7528\u5c31\u76f4\u63a5\u8c03\u7528,\u4e0d\u80fd\u76f4\u63a5\u8c03\u7528\u7c7b\u540d\u8c03\u7528<\/p>\n\n\n\n
                  2.\u8c03\u7528\u975e\u9759\u6001\u7684:\u4e0d\u7ba1\u5728\u4e0d\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d,\u80fd\u76f4\u63a5\u8c03\u7528\u5c31\u76f4\u63a5\u8c03\u7528,\u4e0d\u80fd\u76f4\u63a5\u8c03\u7528\u5c31new\u5bf9\u8c61\u8c03\u7528<\/p>\n\n\n\n
                  \u53ef\u53d8\u53c2\u6570<\/h3>\n\n\n\n
                  1.\u4ecb\u7ecd\u548c\u57fa\u672c\u4f7f\u7528<\/h4>\n\n\n\n
                  1).\u683c\u5f0f:
                  \u6570\u636e\u7c7b\u578b\u2026\u53d8\u91cf\u540d<\/p>\n\n\n\n
                  2).\u672c\u8d28:\u53ef\u53d8\u53c2\u6570\u672c\u8d28\u4e0a\u662f\u6570\u7ec4<\/p>\n\n\n\n
                  3).\u6ce8\u610f:
                  \u53c2\u6570\u4f4d\u7f6e\u53ea\u80fd\u6709\u4e00\u4e2a\u53ef\u53d8\u53c2\u6570,\u800c\u4e14\u8981\u5728\u53c2\u6570\u5217\u8868\u6700\u540e<\/p>\n\n\n\n
                  \"\"<\/div><\/figure>\n\n\n\n
                  public class Demo01Var {\n    public static void main(String[] args) {\n        method(1,2,3,2,3,4,53,4,5);\n        \n        method02(1,2,3,4,5);\n    }\n    public static void method(int...arr){\n        int sum = 0;\n        for (int i = 0; i < arr.length; i++) {\n            sum+=arr[i];\n        }\n        System.out.println(\"sum = \" + sum);\n    }\n    \n    public static void method02(int a,int...arr){\n        \n    }\n}\n<\/code><\/pre>\n\n\n\n
                  2.\u53ef\u53d8\u53c2\u6570<\/h4>\n\n\n\n
                  \u5728JDK1.5<\/strong>\u4e4b\u540e\uff0c\u5982\u679c\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\u65f6\uff0c\u6b64\u65f6\u67d0\u4e2a\u5f62\u53c2\u7684\u7c7b\u578b\u53ef\u4ee5\u786e\u5b9a\uff0c\u4f46\u662f\u5f62\u53c2\u7684\u4e2a\u6570\u4e0d\u786e\u5b9a\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u53ef\u53d8\u53c2\u6570\u3002<\/p>\n\n\n\n
                  \u683c\u5f0f:\u3010\u4fee\u9970\u7b26\u3011 \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d(\u3010\u975e\u53ef\u53d8\u53c2\u6570\u90e8\u5206\u7684\u5f62\u53c2\u5217\u8868,\u3011\u53c2\u6570\u7c7b\u578b\u2026 \u5f62\u53c2\u540d){ }<\/p>\n\n\n\n
                  \u8981\u6c42\uff1a<\/p>\n\n\n\n
                  (1)\u4e00\u4e2a\u65b9\u6cd5\u6700\u591a\u53ea\u80fd\u6709\u4e00\u4e2a\u53ef\u53d8\u53c2\u6570<\/p>\n\n\n\n
                  (2)\u5982\u679c\u4e00\u4e2a\u65b9\u6cd5\u5305\u542b\u53ef\u53d8\u53c2\u6570\uff0c\u90a3\u4e48\u53ef\u53d8\u53c2\u6570\u5fc5\u987b\u662f\u5f62\u53c2\u5217\u8868\u7684\u6700\u540e\u4e00\u4e2a<\/p>\n\n\n\n
                  (3)\u5176\u5b9e\u8fd9\u4e2a\u4e66\u5199\u201c\u2248\u201d<\/p>\n\n\n\n
                  \u3010\u4fee\u9970\u7b26\u3011 \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d(\u3010\u975e\u53ef\u53d8\u53c2\u6570\u90e8\u5206\u7684\u5f62\u53c2\u5217\u8868,\u3011\u53c2\u6570\u7c7b\u578b[] \u5f62\u53c2\u540d){  }<\/pre>\n\n\n\n
                  \u53ea\u662f\u540e\u9762\u8fd9\u79cd\u5b9a\u4e49\uff0c\u5728\u8c03\u7528\u65f6\u5fc5\u987b\u4f20\u9012\u6570\u7ec4\uff0c\u800c\u524d\u8005\u66f4\u7075\u6d3b\uff0c\u65e2\u53ef\u4ee5\u4f20\u9012\u6570\u7ec4\uff0c\u53c8\u53ef\u4ee5\u76f4\u63a5\u4f20\u9012\u6570\u7ec4\u7684\u5143\u7d20\uff0c\u8fd9\u6837\u66f4\u7075\u6d3b\u4e86\u3002<\/p>\n\n\n\n
                  \u9012\u5f52<\/h3>\n\n\n\n
                  1.\u6982\u8ff0:\u65b9\u6cd5\u5185\u90e8\u81ea\u5df1\u8c03\u7528\u81ea\u5df1<\/h4>\n\n\n\n
                  2.\u5206\u7c7b:<\/h4>\n\n\n\n
                  a.\u76f4\u63a5\u9012\u5f52: \u65b9\u6cd5\u5185\u90e8\u81ea\u5df1\u8c03\u7528\u81ea\u5df1
                  b.\u95f4\u63a5\u9012\u5f52:
                  \u65b9\u6cd5\u4e4b\u95f4\u4e92\u76f8\u8c03\u7528<\/p>\n\n\n\n
                  3.\u6ce8\u610f:<\/h4>\n\n\n\n
                  a.\u9012\u5f52\u5fc5\u987b\u8981\u6709\u51fa\u53e3,\u5426\u5219\u4f1a\u51fa\u73b0”\u6808\u5185\u5b58\u6ea2\u51fa”
                  b.\u5373\u4f7f\u6709\u51fa\u53e3,\u4e5f\u4e0d\u8981\u9012\u5f52\u592a\u591a\u6b21,\u5426\u5219\u4e5f\u4f1a\u51fa\u73b0”\u6808\u5185\u5b58\u6ea2\u51fa”<\/p>\n\n\n\n
                  public class Demo01DiGui {\n    public static void main(String[] args) {\n        method();\n    }\n\n    public static void method() {\n        method();\/\/\u6ca1\u6709\u51fa\u53e3,\u5c31\u4f1a\u51fa\u73b0\u6808\u5185\u5b58\u6ea2\u51fa\u73b0\u8c61\n    }\n}\n<\/code><\/pre>\n\n\n\n
                  4.\u9012\u5f52<\/h4>\n\n\n\n
                    \n
                  • \u9012\u5f52<\/strong>\uff1a\u6307\u5728\u5f53\u524d\u65b9\u6cd5\u5185\u8c03\u7528\u81ea\u5df1\u7684\u8fd9\u79cd\u73b0\u8c61\u3002<\/li>\n\n\n\n
                  • \u9012\u5f52\u7684\u5206\u7c7b:<\/strong>\n
                      \n
                    • \u9012\u5f52\u5206\u4e3a\u4e24\u79cd\uff0c\u76f4\u63a5\u9012\u5f52\u548c\u95f4\u63a5\u9012\u5f52\u3002<\/li>\n\n\n\n
                    • \u76f4\u63a5\u9012\u5f52\u79f0\u4e3a\u65b9\u6cd5\u81ea\u8eab\u8c03\u7528\u81ea\u5df1\u3002<\/li>\n\n\n\n
                    • \u95f4\u63a5\u9012\u5f52\u53ef\u4ee5A\u65b9\u6cd5\u8c03\u7528B\u65b9\u6cd5\uff0cB\u65b9\u6cd5\u8c03\u7528C\u65b9\u6cd5\uff0cC\u65b9\u6cd5\u8c03\u7528A\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                    • \u6ce8\u610f\u4e8b\u9879<\/strong>\uff1a\n
                        \n
                      • \u9012\u5f52\u4e00\u5b9a\u8981\u6709\u6761\u4ef6\u9650\u5b9a\uff0c\u4fdd\u8bc1\u9012\u5f52\u80fd\u591f\u505c\u6b62\u4e0b\u6765\uff0c\u5426\u5219\u4f1a\u53d1\u751f\u6808\u5185\u5b58\u6ea2\u51fa(\u56e0\u4e3a\u4f1a\u4e0d\u65ad\u7684\u538b\u6808)\u3002<\/li>\n\n\n\n
                      • \u5728\u9012\u5f52\u4e2d\u867d\u7136\u6709\u9650\u5b9a\u6761\u4ef6\uff0c\u4f46\u662f\u9012\u5f52\u6b21\u6570\u4e0d\u80fd\u592a\u591a\u3002\u5426\u5219\u4e5f\u4f1a\u53d1\u751f\u6808\u5185\u5b58\u6ea2\u51fa\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
                        \u793a\u4f8b:\u5229\u7528\u9012\u5f52\u8f93\u51fa3\u52301<\/p>\n\n\n\n
                        public class Demo02DiGui {\n    public static void main(String[] args) {\n        method(3);\n    }\n\n    public static void method(int n) {\n        if (n==1){\n            System.out.println(n);\n            return;\/\/\u7ed3\u675f\u65b9\u6cd5\n        }\n        System.out.println(n);\n        n--;\n        method(n);\n    }\n}<\/code><\/pre>\n\n\n\n
                        \"\"<\/div><\/figure>\n\n\n\n
                        \u65b9\u6cd5\u53c2\u6570<\/h3>\n\n\n\n
                        1.\u57fa\u672c\u6570\u636e\u7c7b\u578b\u505a\u65b9\u6cd5\u53c2\u6570\u4f20\u9012<\/h4>\n\n\n\n
                        \u57fa\u672c\u7c7b\u578b\u505a\u65b9\u6cd5\u53c2\u6570\u4f20\u9012,\u4f20\u9012\u7684\u662f\u53d8\u91cf\u7684\u503c,\u4e0d\u662f\u53d8\u91cf\u672c\u8eab<\/p>\n\n\n\n
                        public class Test01 {\n    public static void main(String[] args) {\n        int a = 10;\n        int b = 20;\n        \/*\n           \u53c2\u6570\u4e3a\u57fa\u672c\u7c7b\u578b,\u4f20\u9012\u7684\u662f\u53d8\u91cf\u4ee3\u8868\u7684\u503c\n           \u4e0d\u662f\u53d8\u91cf\u672c\u8eab\n         *\/\n        method(a,b);\n        System.out.println(a);\/\/10\n        System.out.println(b);\/\/20\n    }\n    public static void method(int a,int b){\n        a+=10;\n        b+=20;\n        System.out.println(a);\/\/20\n        System.out.println(b);\/\/40\n    }\n}<\/code><\/pre>\n\n\n\n
                        2.\u5f15\u7528\u6570\u636e\u7c7b\u578b\u505a\u65b9\u6cd5\u53c2\u6570\u4f20\u9012<\/h4>\n\n\n\n
                        \u5f15\u7528\u7c7b\u578b\u505a\u65b9\u6cd5\u53c2\u6570\u4f20\u9012,\u4f20\u9012\u7684\u5730\u5740\u503c<\/p>\n\n\n\n
                        public class Test02 {\n    public static void main(String[] args) {\n        int[] arr = {10,20};\n        method(arr);\n        System.out.println(arr[0]);\/\/20\n        System.out.println(arr[1]);\/\/40\n    }\n    public static void method(int[] arr){\n        arr[0]+=10;\n        arr[1]+=20;\n        System.out.println(arr[0]);\/\/20\n        System.out.println(arr[1]);\/\/40\n    }\n}\n<\/code><\/pre>\n\n\n\n
                        \"\"<\/div><\/figure>\n\n\n\n
                        <\/p>\n","protected":false},"excerpt":{"rendered":"
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