{"id":1371,"date":"2025-08-21T16:06:54","date_gmt":"2025-08-21T08:06:54","guid":{"rendered":"https:\/\/zero-zl.cn\/?p=1371"},"modified":"2025-08-21T22:21:57","modified_gmt":"2025-08-21T14:21:57","slug":"java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/zero-zl.cn\/index.php\/2025\/08\/21\/java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1\/","title":{"rendered":"Java\u9762\u5411\u5bf9\u8c61"},"content":{"rendered":"\n

1\u3001\u9762\u5411\u5bf9\u8c61\u90fd\u6709\u54ea\u4e9b\u7279\u6027\u4ee5\u53ca\u4f60\u5bf9\u8fd9\u4e9b\u7279\u6027\u7684\u7406\u89e3\uff1f<\/a><\/h2>\n\n\n\n
\n
    \n
  1. \u7ee7\u627f<\/strong>\uff1a\u7ee7\u627f\u662f\u4ece\u5df2\u6709\u7c7b\u5f97\u5230\u7ee7\u627f\u4fe1\u606f\u521b\u5efa\u65b0\u7c7b\u7684\u8fc7\u7a0b\u3002\u63d0\u4f9b\u7ee7\u627f\u4fe1\u606f\u7684\u7c7b\u88ab\u79f0\u4e3a\u7236\u7c7b\uff08\u8d85\u7c7b\u3001\u57fa\u7c7b\uff09\uff1b\u5f97\u5230\u7ee7\u627f\u4fe1\u606f\u7684 \u7c7b\u88ab\u79f0\u4e3a\u5b50\u7c7b\uff08\u6d3e\u751f\u7c7b\uff09\u3002\u7ee7\u627f\u8ba9\u53d8\u5316\u4e2d\u7684\u8f6f\u4ef6\u7cfb\u7edf\u6709\u4e86\u4e00\u5b9a\u7684\u5ef6\u7eed\u6027\uff0c\u540c\u65f6\u7ee7\u627f\u4e5f\u662f\u5c01\u88c5\u7a0b\u5e8f\u4e2d\u53ef\u53d8\u56e0\u7d20\u7684\u91cd\u8981\u624b\u6bb5\u3002<\/li>\n\n\n\n
  2. \u5c01\u88c5<\/strong>\uff1a\u901a\u5e38\u8ba4\u4e3a\u5c01\u88c5\u662f\u628a\u6570\u636e\u548c\u64cd\u4f5c\u6570\u636e\u7684\u65b9\u6cd5\u7ed1\u5b9a\u8d77\u6765\uff0c\u5bf9\u6570\u636e\u7684\u8bbf\u95ee\u53ea\u80fd\u901a\u8fc7\u5df2\u5b9a\u4e49\u7684\u63a5\u53e3\u3002\u9762\u5411\u5bf9\u8c61\u7684\u672c\u8d28\u5c31\u662f\u5c06\u73b0\u5b9e\u4e16\u754c\u63cf\u7ed8\u6210\u4e00\u7cfb\u5217\u5b8c\u5168\u81ea\u6cbb\u3001\u5c01\u95ed\u7684\u5bf9\u8c61\u3002\u6211\u4eec\u5728\u7c7b\u4e2d\u7f16\u5199\u7684\u65b9\u6cd5\u5c31\u662f\u5bf9\u5b9e\u73b0\u7ec6\u8282\u7684\u4e00\u79cd\u5c01\u88c5\uff1b\u6211\u4eec\u7f16\u5199\u4e00\u4e2a\u7c7b\u5c31\u662f\u5bf9\u6570\u636e\u548c\u6570\u636e\u64cd\u4f5c\u7684\u5c01\u88c5\u3002\u53ef\u4ee5\u8bf4\uff0c\u5c01\u88c5\u5c31\u662f\u9690\u85cf\u4e00\u5207\u53ef\u9690\u85cf\u7684\u4e1c\u897f\uff0c\u53ea\u5411\u5916\u754c\u63d0\u4f9b\u6700\u7b80\u5355\u7684\u7f16\u7a0b\u63a5\u53e3\u3002<\/li>\n\n\n\n
  3. \u591a\u6001\u6027<\/strong>\uff1a\u591a\u6001\u6027\u662f\u6307\u5141\u8bb8\u4e0d\u540c\u5b50\u7c7b\u578b\u7684\u5bf9\u8c61\u5bf9\u540c\u4e00\u6d88\u606f\u4f5c\u51fa\u4e0d\u540c\u7684\u54cd\u5e94\u3002\u7b80\u5355\u7684\u8bf4\u5c31\u662f\u7528\u540c\u6837\u7684\u5bf9\u8c61\u5f15\u7528\u8c03\u7528\u540c\u6837\u7684\u65b9\u6cd5\u4f46\u662f\u505a\u4e86\u4e0d\u540c\u7684\u4e8b\u60c5\u3002\u591a\u6001\u6027\u5206\u4e3a\u7f16\u8bd1\u65f6\u7684\u591a\u6001\u6027\u548c\u8fd0\u884c\u65f6\u7684\u591a\u6001\u6027\u3002\u5982\u679c\u5c06\u5bf9\u8c61\u7684\u65b9\u6cd5\u89c6\u4e3a\u5bf9\u8c61\u5411\u5916\u754c\u63d0\u4f9b\u7684\u670d\u52a1\uff0c\u90a3\u4e48\u8fd0\u884c\u65f6\u7684\u591a\u6001\u6027\u53ef\u4ee5\u89e3\u91ca\u4e3a\uff1a\u5f53 A \u7cfb\u7edf\u8bbf\u95ee B \u7cfb\u7edf\u63d0\u4f9b\u7684\u670d\u52a1\u65f6\uff0c B \u7cfb\u7edf\u6709\u591a\u79cd\u63d0\u4f9b\u670d\u52a1\u7684\u65b9\u5f0f\uff0c\u4f46\u4e00\u5207\u5bf9 A \u7cfb\u7edf\u6765\u8bf4\u90fd\u662f\u900f\u660e\u7684\u3002\u65b9\u6cd5\u91cd\u8f7d\uff08 overload \uff09\u5b9e\u73b0\u7684\u662f\u7f16\u8bd1\u65f6\u7684\u591a\u6001\u6027\uff08\u4e5f\u79f0\u4e3a\u524d\u7ed1\u5b9a\uff09\uff0c\u800c\u65b9\u6cd5\u91cd\u5199override \uff09\u5b9e\u73b0\u7684\u662f\u8fd0\u884c\u65f6\u7684\u591a\u6001\u6027\uff08\u4e5f\u79f0\u4e3a\u540e\u7ed1\u5b9a\uff09\u3002\u8fd0\u884c\u65f6\u7684\u591a\u6001\u662f\u9762\u5411\u5bf9\u8c61\u6700\u7cbe\u9ad3\u7684\u4e1c\u897f\uff0c\u8981\u5b9e\u73b0 \u591a\u6001\u9700\u8981\u505a\u4e24\u4ef6\u4e8b\uff1a 1. \u65b9\u6cd5\u91cd\u5199\uff08\u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\u5e76\u91cd\u5199\u7236\u7c7b\u4e2d\u5df2\u6709\u7684\u6216\u62bd\u8c61\u7684\u65b9\u6cd5\uff09\uff1b 2. \u5bf9\u8c61\u9020\u578b\uff08\u7528\u7236\u7c7b\u578b\u5f15\u7528\u5f15\u7528\u5b50\u7c7b\u578b\u5bf9\u8c61\uff0c\u8fd9\u6837\u540c\u6837\u7684\u5f15\u7528\u8c03\u7528\u540c\u6837\u7684\u65b9\u6cd5\u5c31\u4f1a\u6839\u636e\u5b50\u7c7b\u5bf9\u8c61\u7684\u4e0d\u540c\u800c\u8868\u73b0\u51fa\u4e0d\u540c\u7684\u884c\u4e3a\uff09\u3002<\/li>\n\n\n\n
  4. \u62bd\u8c61<\/strong>\uff1a\u62bd\u8c61\u662f\u5c06\u4e00\u7c7b\u5bf9\u8c61\u7684\u5171\u540c\u7279\u5f81\u603b\u7ed3\u51fa\u6765\u6784\u9020\u7c7b\u7684\u8fc7\u7a0b\uff0c\u5305\u62ec\u6570\u636e\u62bd\u8c61\u548c\u884c\u4e3a\u62bd\u8c61\u4e24\u65b9\u9762\u3002\u62bd\u8c61\u53ea\u5173\u6ce8\u5bf9\u8c61\u6709\u54ea\u4e9b\u5c5e\u6027\u548c\u884c\u4e3a\uff0c\u5e76\u4e0d\u5173\u6ce8\u8fd9\u4e9b\u884c\u4e3a\u7684\u7ec6\u8282\u662f\u4ec0\u4e48\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n

    2\u3001\u8bbf\u95ee \u6743\u9650 \u4fee\u9970\u7b26 public \u3001 private \u3001 protected\uff0c \u4ee5\u53ca\u4e0d\u5199\uff08\u9ed8\u8ba4\uff09\u65f6\u7684\u533a\u522b<\/a><\/h2>\n\n\n\n
    \u4fee\u9970\u7b26<\/th>\u5f53\u524d\u7c7b<\/th>\u540c\u5305<\/th>\u5b50\u7c7b<\/th>\u5176\u4ed6\u5305<\/th><\/tr><\/thead>
    public<\/td>\u221a<\/td>\u221a<\/td>\u221a<\/td>\u221a<\/td><\/tr>
    protected<\/td>\u221a<\/td>\u221a<\/td>\u221a<\/td>\u00d7<\/td><\/tr>
    default<\/td>\u221a<\/td>\u221a<\/td>\u00d7<\/td>\u00d7<\/td><\/tr>
    private<\/td>\u221a<\/td>\u00d7<\/td>\u00d7<\/td>\u00d7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    3\u3001\u5982\u4f55\u7406\u89e3 clone \u5bf9\u8c61<\/a><\/h2>\n\n\n\n

    1\u3001\u4e3a\u4ec0\u4e48\u8981\u7528 clone<\/a><\/h3>\n\n\n\n
    \n

    \u5728\u5b9e\u9645\u7f16\u7a0b\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u5e38\u5e38\u8981\u9047\u5230\u8fd9\u79cd\u60c5\u51b5\uff1a\u6709\u4e00\u4e2a\u5bf9\u8c61A \uff0c\u5728\u67d0\u4e00\u65f6\u523b A \u4e2d\u5df2\u7ecf\u5305\u542b\u4e86\u4e00\u4e9b\u6709\u6548\u503c\uff0c\u6b64\u65f6\u53ef\u80fd\u4f1a\u9700\u8981\u4e00\u4e2a\u548c A \u5b8c\u5168\u76f8\u540c\u65b0\u5bf9\u8c61 B \uff0c\u5e76\u4e14\u6b64\u540e\u5bf9 B \u4efb\u4f55\u6539\u52a8\u90fd\u4e0d\u4f1a\u5f71\u54cd\u5230 A \u4e2d\u7684\u503c\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c A \u4e0e B \u662f\u4e24\u4e2a\u72ec\u7acb\u7684\u5bf9\u8c61\uff0c\u4f46 B \u7684\u521d\u59cb\u503c\u662f\u7531 A \u5bf9\u8c61\u786e\u5b9a\u7684\u3002\u5728 Java \u8bed\u8a00\u4e2d\uff0c\u7528\u7b80\u5355\u7684\u8d4b\u503c\u8bed\u53e5\u662f\u4e0d\u80fd\u6ee1\u8db3\u8fd9\u79cd\u9700\u6c42\u7684\u3002\u8981\u6ee1\u8db3\u8fd9\u79cd\u9700\u6c42\u867d\u7136\u6709\u5f88\u591a\u9014\u5f84\uff0c\u4f46\u5b9e\u73b0 clone \uff08\uff09\u65b9\u6cd5\u662f\u5176\u4e2d\u6700\u7b80\u5355\uff0c\u4e5f\u662f\u6700\u9ad8\u6548\u7684\u624b\u6bb5\u3002<\/p>\n<\/blockquote>\n\n\n\n

    2\u3001new\u4e00\u4e2a\u5bf9\u8c61\u7684\u8fc7\u7a0b\u548c clone\u4e00\u4e2a\u5bf9\u8c61\u7684\u8fc7\u7a0b\u533a\u522b\uff1f<\/a><\/h3>\n\n\n\n
    \n

    new\u64cd\u4f5c\u7b26\u7684\u672c\u610f\u662f\u5206\u914d\u5185\u5b58\u3002\u7a0b\u5e8f\u6267\u884c\u5230 new \u64cd\u4f5c\u7b26\u65f6\uff0c\u9996\u5148\u53bb\u770b new \u64cd\u4f5c\u7b26\u540e\u9762\u7684\u7c7b\u578b\uff0c\u56e0\u4e3a\u77e5\u9053\u4e86\u7c7b\u578b\uff0c\u624d\u80fd\u77e5\u9053\u8981\u5206\u914d\u591a\u5927\u7684\u5185\u5b58\u7a7a\u95f4\u3002\u5206\u914d\u5b8c\u5185\u5b58\u4e4b\u540e\uff0c\u518d\u8c03\u7528\u6784\u9020\u51fd\u6570\uff0c\u586b\u5145\u5bf9\u8c61\u7684\u5404\u4e2a\u57df\uff0c\u8fd9\u4e00\u6b65\u53eb\u505a\u5bf9\u8c61\u7684\u521d\u59cb\u5316\uff0c\u6784\u9020\u65b9\u6cd5\u8fd4\u56de\u540e\uff0c\u4e00\u4e2a\u5bf9\u8c61\u521b\u5efa\u5b8c\u6bd5\uff0c\u53ef\u4ee5\u628a\u4ed6\u7684\u5f15\u7528\uff08\u5730\u5740\uff09\u53d1\u5e03\u5230\u5916\u90e8\uff0c\u5728\u5916\u90e8\u5c31\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u5f15\u7528\u64cd\u7eb5\u8fd9\u4e2a\u5bf9\u8c61\u3002<\/p>\n\n\n\n

    clone\u5728\u7b2c\u4e00\u6b65\u662f\u548c new \u76f8\u4f3c\u7684\uff0c\u90fd\u662f\u5206\u914d\u5185\u5b58\uff0c\u8c03\u7528 clone \u65b9\u6cd5\u65f6\uff0c\u5206\u914d\u7684\u5185\u5b58\u548c\u539f\u5bf9\u8c61\uff08\u5373\u8c03\u7528 clone \u65b9\u6cd5\u7684\u5bf9\u8c61\uff09\u76f8\u540c\uff0c\u7136\u540e\u518d\u4f7f\u7528\u539f\u5bf9\u8c61\u4e2d\u5bf9\u5e94\u7684\u5404\u4e2a\u57df\uff0c\u586b\u5145\u65b0\u5bf9\u8c61\u7684\u57df\uff0c\u586b\u5145\u5b8c\u6210\u4e4b\u540e\uff0c clone \u65b9\u6cd5\u8fd4\u56de\uff0c\u4e00\u4e2a\u65b0\u7684\u76f8\u540c\u7684\u5bf9\u8c61\u88ab\u521b\u5efa\uff0c\u540c\u6837\u53ef\u4ee5\u628a\u8fd9\u4e2a\u65b0\u5bf9\u8c61\u7684\u5f15\u7528\u53d1\u5e03\u5230\u5916\u90e8\u3002<\/p>\n<\/blockquote>\n\n\n\n

    3\u3001clone\u5bf9\u8c61\u7684\u4f7f\u7528\uff1f<\/a><\/h3>\n\n\n\n

    1\u3001\u590d\u5236\u5bf9\u8c61\u548c\u590d\u5236\u5f15\u7528\u7684\u533a\u522b<\/a><\/h4>\n\n\n\n
    Person p = new Person(23,\"xiaobear\");\nPerson p1 = p;\nSystem.out.println(p);\nSystem.out.println(p1);<\/code><\/pre>\n\n\n\n
    \u5f53Person p1 = p; \u6267\u884c\u4e4b\u540e\uff0c \u662f\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u5417\uff1f \u9996\u5148\u770b\u6253\u5370\u7ed3\u679c\uff1a<\/p>\n\n\n\n
    Person@2f9ee1ac\nPerson@2f9ee1ac<\/code><\/pre>\n\n\n\n
    \u53ef\u4ee5\u770b\u51fa\uff0c\u6253\u5370\u7684\u5730\u5740\u503c\u662f\u76f8\u540c\u7684\uff0c\u65e2\u7136\u5730\u5740\u90fd\u662f\u76f8\u540c\u7684\uff0c\u90a3\u4e48\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002p \u548c p1 \u53ea\u662f\u5f15\u7528\u800c\u5df2\uff0c\u4ed6\u4eec\u90fd\u6307\u5411\u4e86\u4e00\u4e2a\u76f8\u540c\u7684\u5bf9\u8c61 Person(23, zhang \u201d\u201d) \u3002 \u53ef\u4ee5\u628a\u8fd9\u79cd\u73b0\u8c61\u53eb\u505a\u5f15\u7528\u7684\u590d\u5236<\/strong>\u3002\u4e0a\u9762\u4ee3\u7801\u6267\u884c\u5b8c\u6210\u4e4b\u540e\uff0c\u5185\u5b58\u4e2d\u7684\u60c5\u666f\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    \u800c\u4e0b\u9762\u7684\u4ee3\u7801\u662f\u771f\u771f\u6b63\u6b63\u7684\u514b\u9686\u4e86\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n\n\n\n
    Person p = new Person(23, \"xiaobear\");\nPerson p1 = (Person) p.clone();\nSystem.out.println(p);\nSystem.out.println(p1);<\/code><\/pre>\n\n\n\n
    \u4ece\u6253\u5370\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0c\u4e24\u4e2a\u5bf9\u8c61\u7684\u5730\u5740\u662f\u4e0d\u540c\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u521b\u5efa\u4e86\u65b0\u7684\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u628a\u539f\u5bf9\u8c61\u7684\u5730\u5740\u8d4b\u7ed9\u4e86\u4e00\u4e2a\u65b0\u7684\u5f15\u7528\u53d8\u91cf\uff1a<\/p>\n\n\n\n
    Person@2f9ee1ac\nPerson@67f1fba0<\/code><\/pre>\n\n\n\n
    \u4ee5\u4e0a\u4ee3\u7801\u6267\u884c\u5b8c\u6210\u540e\uff0c\u5185\u5b58\u4e2d\u7684\u60c5\u666f\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    2\u3001\u6df1\u62f7\u8d1d\u548c\u6d45\u62f7\u8d1d<\/a><\/h4>\n\n\n\n
    \u4e0a\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u4e2d\uff0cPerson \u4e2d\u6709\u4e24\u4e2a\u6210\u5458\u53d8\u91cf\uff0c\u5206\u522b\u662f name \u548c age name \u662f String \u7c7b\u578b\uff0c age \u662f int \u7c7b\u578b\u3002\u4ee3\u7801\u975e\u5e38\u7b80\u5355\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n
    public class Person implements Cloneable{\n\tprivate int age ;\n    private String name;\n    public Person(int age, String name) {\n     this.age = age;\n     this.name = name;\n    }\n\n     public Person() {}\n     public int getAge() {\n     return age;\n     }\n\n     public String getName() {\n         return name;\n     }\n     @Override\n     protected Object clone() throws CloneNotSupportedException {\n     return (Person)super.clone();\n     }\n}<\/code><\/pre>\n\n\n\n
    \u7531\u4e8eage \u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c \u90a3\u4e48\u5bf9\u5b83\u7684\u62f7\u8d1d\u6ca1\u6709\u4ec0\u4e48\u7591\u8bae\uff0c\u76f4\u63a5\u5c06\u4e00\u4e2a 4 \u5b57\u8282\u7684\u6574\u6570\u503c\u62f7\u8d1d\u8fc7\u6765\u5c31\u884c\u3002\u4f46\u662f name\u662f String \u7c7b\u578b\u7684\uff0c \u5b83\u53ea\u662f\u4e00\u4e2a\u5f15\u7528\uff0c \u6307\u5411\u4e00\u4e2a\u771f\u6b63\u7684 String \u5bf9\u8c61\uff0c\u90a3\u4e48\u5bf9\u5b83\u7684\u62f7\u8d1d \u6709\u4e24\u79cd\u65b9\u5f0f\uff1a \u76f4\u63a5\u5c06\u539f\u5bf9\u8c61\u4e2d\u7684 name \u7684\u5f15\u7528\u503c\u62f7\u8d1d\u7ed9\u65b0\u5bf9\u8c61\u7684 name \u5b57\u6bb5\uff0c \u6216\u8005\u662f\u6839\u636e\u539f Person \u5bf9\u8c61\u4e2d\u7684 name \u6307\u5411\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u76f8\u540c\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u5c06\u8fd9\u4e2a\u65b0\u5b57\u7b26\u4e32\u5bf9\u8c61\u7684\u5f15\u7528\u8d4b\u7ed9\u65b0\u62f7\u8d1d\u7684 Person \u5bf9\u8c61\u7684 name \u5b57\u6bb5\u3002\u8fd9\u4e24\u79cd\u62f7\u8d1d\u65b9\u5f0f\u5206\u522b
    \u53eb\u505a\u6d45\u62f7\u8d1d\u548c\u6df1\u62f7\u8d1d\u3002\u6df1\u62f7\u8d1d\u548c\u6d45\u62f7\u8d1d\u7684\u539f\u7406\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    \u4e0b\u9762\u901a\u8fc7\u4ee3\u7801\u8fdb\u884c\u9a8c\u8bc1\u3002\u5982\u679c\u4e24\u4e2aPerson \u5bf9\u8c61\u7684 name \u7684\u5730\u5740\u503c\u76f8\u540c\uff0c \u8bf4\u660e\u4e24\u4e2a\u5bf9\u8c61\u7684 name \u90fd\u6307\u5411\u540c\u4e00\u4e2aString \u5bf9\u8c61\uff0c\u4e5f\u5c31\u662f\u6d45\u62f7\u8d1d\uff0c \u800c\u5982\u679c\u4e24\u4e2a\u5bf9\u8c61\u7684 name \u7684\u5730\u5740\u503c\u4e0d\u540c\uff0c \u90a3 \u4e48\u5c31\u8bf4\u660e\u6307\u5411\u4e0d\u540c\u7684 String \u5bf9\u8c61\uff0c \u4e5f\u5c31\u662f\u5728\u62f7\u8d1d Person \u5bf9\u8c61\u7684\u65f6\u5019\uff0c \u540c\u65f6\u62f7\u8d1d\u4e86 name \u5f15\u7528\u7684 String \u5bf9\u8c61\uff0c \u4e5f\u5c31\u662f\u6df1\u62f7\u8d1d\u3002\u9a8c\u8bc1\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
     Person p = new Person(23, \"xiaobear\");\n Person p1 = (Person) p.clone();\n String result = p.getName() == p1.getName() ? \"clone \u662f\u6d45\u62f7\u8d1d\u7684 \" : \"clone \u662f\u6df1\u62f7\u8d1d\u7684\n System.out.println(result);<\/code><\/pre>\n\n\n\n
    \u6253\u5370\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n
    clone \u662f\u6d45\u62f7\u8d1d\u7684<\/code><\/pre>\n\n\n\n
    \u6240\u4ee5\uff0cclone \u65b9\u6cd5\u6267\u884c\u7684\u662f\u6d45\u62f7\u8d1d<\/strong>\u3002<\/p>\n\n\n\n
    3\u3001\u5982\u4f55\u8fdb\u884c\u6df1\u62f7\u8d1d<\/a><\/h4>\n\n\n\n
    \n
    \u5982\u679c\u60f3\u8981\u6df1\u62f7\u8d1d\u4e00\u4e2a\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u5fc5\u987b\u8981\u5b9e\u73b0Cloneable \u63a5\u53e3\uff0c\u5b9e\u73b0 clone\u65b9\u6cd5\uff0c\u5e76\u4e14\u5728 clone \u65b9\u6cd5\u5185\u90e8\uff0c\u628a\u8be5\u5bf9\u8c61\u5f15\u7528\u7684\u5176\u4ed6\u5bf9\u8c61\u4e5f\u8981 clone \u4e00\u4efd\uff0c\u8fd9\u5c31\u8981\u6c42\u8fd9\u4e2a\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u5fc5\u987b\u4e5f\u8981\u5b9e\u73b0Cloneable \u63a5\u53e3\u5e76\u4e14\u5b9e\u73b0 clone \u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n
    public class DeepCopy {\n    static class Body implements Cloneable{\n        public Head head;\n        public Body(){ }\n        public Body(Head head) {\n            this.head = head;\n        }\n\n        @Override\n        protected Object clone() throws CloneNotSupportedException {\n            Body clone = (Body) super.clone();\n            clone.head = (Head) head.clone();\n            return clone;\n        }\n    }\n\n    static class Head implements Cloneable{\n        public Face face;\n        public Head(Face deepCopy) {\n        }\n\n        @Override\n        protected Object clone() throws CloneNotSupportedException {\n            return super.clone();\n        }\n    }\n    static class Face implements Cloneable{\n        @Override\n        protected Object clone() throws CloneNotSupportedException {\n            return super.clone();\n        }\n    }\n\n    public static void main(String[] args) throws CloneNotSupportedException {\n        Body body = new Body(new Head(new Face()));\n        Body body1 = (Body) body.clone();\n        System.out.println(\"body == body1 : \" + (body == body1) );\n        System.out.println(\"body.head == body1.head : \" + (body.head == body1.head));\n    }\n}<\/code><\/pre>\n\n\n\n
    \u6253\u5370\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n\n\n\n
    body == body1 : false\nbody.head == body1.head : false<\/code><\/pre>\n\n\n\n
    4\u3001\u7528\u6237\u4e0d\u80fd\u8c03\u7528\u6784\u9020\u65b9\u6cd5\uff0c\u53ea\u80fd\u901a\u8fc7new\u5173\u952e\u5b57\u81ea\u52a8\u8c03\u7528\uff1f<\/a><\/h2>\n\n\n\n
    \n
    \u9519\u8bef<\/p>\n\n\n\n
      \n
    1. \u5728\u7c7b\u5185\u90e8\u53ef\u4ee5\u7528\u6237\u53ef\u4ee5\u4f7f\u7528\u5173\u952e\u5b57**this.\u6784\u9020\u65b9\u6cd5\u540d()**\u8c03\u7528\uff08\u53c2\u6570\u51b3\u5b9a\u8c03\u7528\u7684\u662f\u672c\u7c7b\u5bf9\u5e94\u7684\u6784\u9020\u65b9\u6cd5\uff09<\/li>\n\n\n\n
    2. \u5728\u5b50\u7c7b\u4e2d\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u5173\u952e\u5b57**super.\u7236\u7c7b\u6784\u9020\u65b9\u6cd5\u540d()**\u8c03\u7528\uff08\u53c2\u6570\u51b3\u5b9a\u8c03\u7528\u7684\u662f\u7236\u7c7b\u5bf9\u5e94\u7684\u6784\u9020\u65b9\u6cd5\u3002\uff09<\/li>\n\n\n\n
    3. \u5728\u53cd\u5c04\u4e2d\u53ef\u4ee5\u4f7f\u7528newInstance()\u7684\u65b9\u5f0f\u8c03\u7528\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n
      5\u3001\u8bb2\u8bb2\u7c7b\u7684\u5b9e\u4f8b\u5316\u987a\u5e8f\uff0c\u6bd4\u5982\u7236\u7c7b\u9759\u6001\u6570\u636e\uff0c\u6784\u9020\u51fd\u6570\uff0c\u5b50\u7c7b\u9759\u6001\u6570\u636e\uff0c\u6784\u9020\u51fd\u6570?<\/a><\/h2>\n\n\n\n
      \n
      \u57fa\u672c\u4e0a\u4ee3\u7801\u5757\u5206\u4e3a\u4e09\u79cd\uff1aStatic\u9759\u6001\u4ee3\u7801\u5757\u3001\u6784\u9020\u4ee3\u7801\u5757\u3001\u666e\u901a\u4ee3\u7801\u5757<\/p>\n\n\n\n
      \u4ee3\u7801\u5757\u6267\u884c\u987a\u5e8f\u9759\u6001\u4ee3\u7801\u5757\u2014\u2014> \u6784\u9020\u4ee3\u7801\u5757 \u2014\u2014> \u6784\u9020\u51fd\u6570\u2014\u2014> \u666e\u901a\u4ee3\u7801\u5757<\/strong><\/p>\n\n\n\n
      \u7ee7\u627f\u4e2d\u4ee3\u7801\u5757\u6267\u884c\u987a\u5e8f\uff1a\u7236\u7c7b\u9759\u6001\u5757\u2014\u2014>\u5b50\u7c7b\u9759\u6001\u5757\u2014\u2014>\u7236\u7c7b\u4ee3\u7801\u5757\u2014\u2014>\u7236\u7c7b\u6784\u9020\u5668\u2014\u2014>\u5b50\u7c7b\u4ee3\u7801\u5757\u2014\u2014>\u5b50\u7c7b\u6784\u9020\u5668<\/strong><\/p>\n<\/blockquote>\n\n\n\n
      public class Parent{\n    {\n        System.out.println(\"\u7236\u7c7b\u975e\u9759\u6001\u4ee3\u7801\u5757\");\n    }\n    static{\n        System.out.println(\"\u7236\u7c7b\u9759\u6001\u4ee3\u7801\u5757\");\n    }\n    public Parent(){\n        System.out.println(\"\u7236\u7c7b\u6784\u9020\u5668\");\n    }\n}\npublic class Son extends parent{\n    public Son(){\n        System.out.println(\"\u5b50\u7c7b\u6784\u9020\u5668\");\n    }\n    static{\n        System.out.println(\"\u5b50\u7c7b\u9759\u6001\u4ee3\u7801\u5757\");\n    }\n    {\n      System.out.println(\"\u5b50\u7c7b\u975e\u9759\u6001\u4ee3\u7801\u5757\");   \n    }\n}\n\npublic class Test {\n    public static void main(String[] args){\n        Son son = new Son();\n    }\n}<\/code><\/pre>\n\n\n\n
      \u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n
      \u7236\u7c7b\u9759\u6001\u5757\n\u5b50\u7c7b\u9759\u6001\u4ee3\u7801\u5757\n\u7236\u7c7b\u975e\u9759\u6001\u4ee3\u7801\u5757\n\u7236\u7c7b\u6784\u9020\u5668\n\u5b50\u7c7b\u975e\u9759\u6001\u4ee3\u7801\u5757\n\u5b50\u7c7b\u6784\u9020\u5668<\/code><\/pre>\n\n\n\n
      \n
      \u7c7b\u5b9e\u4f8b\u5316\u987a\u5e8f\u4e3a\uff1a<\/strong>\u7236\u7c7b\u9759\u6001\u4ee3\u7801\u5757\/\u9759\u6001\u57df->\u5b50\u7c7b\u9759\u6001\u4ee3\u7801\u5757\/\u9759\u6001\u57df -> \u7236\u7c7b\u975e\u9759\u6001\u4ee3\u7801\u5757 -> \u7236\u7c7b\u6784\u9020\u5668 -> \u5b50\u7c7b\u975e\u9759\u6001\u4ee3\u7801\u5757 -> \u5b50\u7c7b\u6784\u9020\u5668<\/mark><\/p>\n<\/blockquote>\n\n\n\n
      6\u3001\u6784\u9020\u5668\uff08constructor\uff09\u662f\u5426\u53ef\u88ab\u91cd\u5199\uff08override\uff09\uff1f<\/a><\/h2>\n\n\n\n
      \n
      \u6784\u9020\u5668\u4e0d\u80fd\u88ab\u7ee7\u627f\uff0c\u56e0\u6b64\u4e0d\u80fd\u88ab\u91cd\u5199\uff0c\u4f46\u53ef\u4ee5\u88ab\u91cd\u8f7d\u3002\u6bcf\u4e00\u4e2a\u7c7b\u5fc5\u987b\u6709\u81ea\u5df1\u7684\u6784\u9020\u51fd\u6570\uff0c\u8d1f\u8d23\u6784\u9020\u81ea\u5df1\u8fd9\u90e8\u5206\u7684\u6784\u9020\u3002\u5b50\u7c7b\u4e0d\u4f1a\u8986\u76d6\u7236\u7c7b\u7684\u6784\u9020\u51fd\u6570\uff0c\u76f8\u53cd\u5fc5\u987b\u4e00\u5f00\u59cb\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n<\/blockquote>\n\n\n\n
      7\u3001\u521b\u5efa\u5bf9\u8c61\u7684\u51e0\u79cd\u65b9\u5f0f\uff1f<\/a><\/h2>\n\n\n\n
      \n
        \n
      1. new\u521b\u5efa\u65b0\u5bf9\u8c61<\/li>\n\n\n\n
      2. \u901a\u8fc7\u53cd\u5c04\u673a\u5236<\/li>\n\n\n\n
      3. \u91c7\u7528clone\u673a\u5236<\/li>\n\n\n\n
      4. \u901a\u8fc7\u5e8f\u5217\u5316\u673a\u5236<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n
        8\u3001Super\u4e0ethis\u8868\u793a\u4ec0\u4e48\uff1f<\/a><\/h2>\n\n\n\n
        \n
        Super\u8868\u793a\u5f53\u524d\u7c7b\u7684\u7236\u7c7b\u5bf9\u8c61
        This\u8868\u793a\u5f53\u524d\u7c7b\u7684\u5bf9\u8c61<\/p>\n<\/blockquote>\n\n\n\n
        9\u3001Java\u56db\u79cd\u5f15\u7528\u7c7b\u578b<\/a><\/h2>\n\n\n\n
        \n
          \n
        1. \u5f3a\u5f15\u7528<\/strong>\uff1a\u5f3a\u5f15\u7528\u662f\u5e73\u5e38\u4e2d\u4f7f\u7528\u6700\u591a\u7684\u5f15\u7528\uff0c\u5f3a\u5f15\u7528\u5728\u7a0b\u5e8f\u5185\u5b58\u4e0d\u8db3\uff08OOM\uff09\u7684\u65f6\u5019\u4e5f\u4e0d\u4f1a\u88ab\u56de\u6536\u3002String str = new String(\"str\");<\/code><\/li>\n\n\n\n
        2. \u8f6f\u5f15\u7528<\/strong>\uff1a\u8f6f\u5f15\u7528\u5728\u7a0b\u5e8f\u5185\u5b58\u4e0d\u8db3\u65f6\uff0c\u4f1a\u88ab\u56de\u6536\u3002\/\/ \u6ce8\u610f\uff1awrf\u8fd9\u4e2a\u5f15\u7528\u4e5f\u662f\u5f3a\u5f15\u7528\uff0c\u5b83\u662f\u6307\u5411SoftReference\u8fd9\u4e2a\u5bf9\u8c61\u7684\uff0c \/\/ \u8fd9\u91cc\u7684\u8f6f\u5f15\u7528\u6307\u7684\u662f\u6307\u5411new String(\"str\")\u7684\u5f15\u7528\uff0c\u4e5f\u5c31\u662fSoftReference\u7c7b\u4e2dT SoftReference<String> wrf = new SoftReference<String>(new String(\"str\"));<\/code>\u53ef\u7528\u573a\u666f<\/mark>\uff1a \u521b\u5efa\u7f13\u5b58\u7684\u65f6\u5019\uff0c\u521b\u5efa\u7684\u5bf9\u8c61\u653e\u8fdb\u7f13\u5b58\u4e2d\uff0c\u5f53\u5185\u5b58\u4e0d\u8db3\u65f6\uff0cJVM\u5c31\u4f1a\u56de\u6536\u65e9\u5148\u521b\u5efa\u7684\u5bf9\u8c61\u3002<\/li>\n\n\n\n
        3. \u5f31\u5f15\u7528<\/strong>\uff1a\u53ea\u8981JVM\u5783\u573e\u56de\u6536\u5668\u53d1\u73b0\u4e86\u5b83\uff0c\u5c31\u4f1a\u5c06\u4e4b\u56de\u6536WeakReference<String>wrf=newWeakReference<String>(str);<\/code>\u53ef\u7528\u573a\u666f<\/mark>\uff1aJava\u6e90\u7801\u4e2d\u7684java.util.WeakHashMap\u4e2d\u7684key\u5c31\u662f\u4f7f\u7528\u5f31\u5f15\u7528\uff0c\u6211\u7684\u7406\u89e3\u5c31\u662f\uff0c\u4e00\u65e6\u6211\u4e0d\u9700\u8981\u67d0\u4e2a\u5f15\u7528\uff0cJVM\u4f1a\u81ea\u52a8\u5e2e\u6211\u5904\u7406\u5b83\uff0c\u8fd9\u6837\u6211\u5c31\u4e0d\u9700\u8981\u505a\u5176\u5b83\u64cd\u4f5c\u3002<\/li>\n\n\n\n
        4. \u865a\u5f15\u7528<\/strong>\uff1a\u865a\u5f15\u7528\u7684\u56de\u6536\u673a\u5236\u8ddf\u5f31\u5f15\u7528\u5dee\u4e0d\u591a\uff0c\u4f46\u662f\u5b83\u88ab\u56de\u6536\u4e4b\u524d\uff0c\u4f1a\u88ab\u653e\u5165ReferenceQueue\u4e2d\u3002\u6ce8\u610f\u54e6\uff0c\u5176\u5b83\u5f15\u7528\u662f\u88abJVM\u56de\u6536\u540e\u624d\u88ab\u4f20\u5165ReferenceQueue\u4e2d\u7684\u3002\u7531\u4e8e\u8fd9\u4e2a\u673a\u5236\uff0c\u6240\u4ee5\u865a\u5f15\u7528\u5927\u591a\u88ab\u7528\u4e8e\u5f15\u7528\u9500\u6bc1\u524d\u7684\u5904\u7406\u5de5\u4f5c\u3002\u8fd8\u6709\u5c31\u662f\uff0c\u865a\u5f15\u7528\u521b\u5efa\u7684\u65f6\u5019\uff0c\u5fc5\u987b\u5e26\u6709ReferenceQueuePhantomReference<String>prf=newPhantomReference<String>(new String(\"str\"),newReferenceQueue<>());<\/code>\u53ef\u7528\u573a\u666f<\/mark>\uff1a \u5bf9\u8c61\u9500\u6bc1\u524d\u7684\u4e00\u4e9b\u64cd\u4f5c\uff0c\u6bd4\u5982\u8bf4\u8d44\u6e90\u91ca\u653e\u7b49\u3002Object.finalize() \u867d\u7136\u4e5f\u53ef\u4ee5\u505a\u8fd9\u7c7b\u52a8\u4f5c\uff0c\u4f46\u662f\u8fd9\u4e2a\u65b9\u5f0f\u5373\u4e0d\u5b89\u5168\u53c8\u4f4e\u6548\u4e0a\u8bc9\u6240\u8bf4\u7684\u51e0\u7c7b\u5f15\u7528\uff0c\u90fd\u662f\u6307\u5bf9\u8c61\u672c\u8eab\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u6307 Reference \u7684\u56db\u4e2a\u5b50\u7c7b\u7684\u5f15\u7528( SoftReference \u7b49)\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n
          10\u3001\u6210\u5458\u53d8\u91cf\uff08\u5c5e\u6027\uff09\u548c\u5c40\u90e8\u53d8\u91cf\u7684\u533a\u522b\uff1f<\/a><\/h2>\n\n\n\n
          \"\"<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"
          1\u3001\u9762\u5411\u5bf9\u8c61\u90fd\u6709\u54ea\u4e9b\u7279\u6027\u4ee5\u53ca\u4f60\u5bf9\u8fd9\u4e9b\u7279\u6027\u7684\u7406\u89e3\uff1f 2\u3001\u8bbf\u95ee \u6743\u9650 \u4fee\u9970\u7b26 public \u3001 private \u3001 […]<\/p>\n","protected":false},"author":1,"featured_media":234,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103,104],"tags":[],"class_list":["post-1371","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts\/1371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1371"}],"version-history":[{"count":7,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts\/1371\/revisions"}],"predecessor-version":[{"id":1445,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts\/1371\/revisions\/1445"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/media\/234"}],"wp:attachment":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}