{"id":53836,"date":"2025-08-12T17:49:36","date_gmt":"2025-08-12T09:49:36","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/53836.html"},"modified":"2025-08-12T17:49:36","modified_gmt":"2025-08-12T09:49:36","slug":"java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%ef%bc%88oop%ef%bc%89%e7%9a%84%e4%b8%89%e5%a4%a7%e6%a0%b8%e5%bf%83%e7%89%b9%e5%be%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/53836.html","title":{"rendered":"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81"},"content":{"rendered":"<p>Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b&#xff08;OOP&#xff09;\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81\u662f\u5c01\u88c5&#xff08;Encapsulation&#xff09;\u3001\u7ee7\u627f&#xff08;Inheritance&#xff09; \u548c\u591a\u6001&#xff08;Polymorphism&#xff09;\u3002\u5b83\u4eec\u5171\u540c\u6784\u6210\u4e86\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u57fa\u7840&#xff0c;\u65e8\u5728\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u6269\u5c55\u6027\u3002\u4ee5\u4e0b\u662f\u5bf9\u6bcf\u4e2a\u7279\u5f81\u7684\u8be6\u7ec6\u89e3\u6790&#xff0c;\u5305\u542b\u5b9a\u4e49\u3001\u4f5c\u7528\u3001\u5b9e\u73b0\u65b9\u5f0f\u53ca\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<h4>\u4e00\u3001\u5c01\u88c5&#xff08;Encapsulation&#xff09;<\/h4>\n<h5>1. \u5b9a\u4e49<\/h5>\n<p>\u5c01\u88c5\u662f\u6307\u5c06\u5bf9\u8c61\u7684\u5c5e\u6027&#xff08;\u6570\u636e&#xff09;\u548c\u65b9\u6cd5&#xff08;\u64cd\u4f5c&#xff09;\u6346\u7ed1\u5728\u4e00\u8d77&#xff0c;\u5e76\u901a\u8fc7\u8bbf\u95ee\u63a7\u5236\u7b26\u9650\u5236\u5916\u90e8\u5bf9\u5185\u90e8\u7ec6\u8282\u7684\u76f4\u63a5\u8bbf\u95ee&#xff0c;\u4ec5\u66b4\u9732\u5fc5\u8981\u7684\u63a5\u53e3&#xff08;\u65b9\u6cd5&#xff09;\u3002<\/p>\n<p>\u7b80\u5355\u8bf4&#xff1a;\u201c\u9690\u85cf\u5185\u90e8\u5b9e\u73b0&#xff0c;\u53ea\u7559\u8bbf\u95ee\u5165\u53e3\u201d\u3002<\/p>\n<h5>2. \u6838\u5fc3\u4f5c\u7528<\/h5>\n<ul>\n<li>\u6570\u636e\u5b89\u5168&#xff1a;\u9632\u6b62\u5916\u90e8\u968f\u610f\u4fee\u6539\u5bf9\u8c61\u7684\u5185\u90e8\u72b6\u6001&#xff08;\u5982\u5e74\u9f84\u4e0d\u80fd\u4e3a\u8d1f\u6570\u3001\u5bc6\u7801\u4e0d\u80fd\u76f4\u63a5\u66b4\u9732&#xff09;\u3002<\/li>\n<li>\u4ee3\u7801\u590d\u7528&#xff1a;\u5c06\u76f8\u5173\u903b\u8f91\u5c01\u88c5\u5728\u7c7b\u4e2d&#xff0c;\u907f\u514d\u91cd\u590d\u4ee3\u7801\u3002<\/li>\n<li>\u964d\u4f4e\u8026\u5408&#xff1a;\u5916\u90e8\u53ea\u9700\u901a\u8fc7\u63a5\u53e3\u64cd\u4f5c&#xff0c;\u65e0\u9700\u5173\u5fc3\u5185\u90e8\u5b9e\u73b0&#xff0c;\u4fbf\u4e8e\u540e\u7eed\u4fee\u6539\u3002<\/li>\n<\/ul>\n<h5>3. \u5b9e\u73b0\u65b9\u5f0f<\/h5>\n<ul>\n<li>\n<p>\u6b65\u9aa41&#xff1a;\u7528\u8bbf\u95ee\u63a7\u5236\u7b26\u4fee\u9970\u7c7b\u7684\u6210\u5458&#xff08;\u5c5e\u6027\u548c\u65b9\u6cd5&#xff09;&#xff0c;\u9650\u5236\u8bbf\u95ee\u6743\u9650\u3002 Java\u7684\u8bbf\u95ee\u63a7\u5236\u7b26\u4ece\u4e25\u683c\u5230\u5bbd\u677e&#xff1a;private&#xff08;\u4ec5\u672c\u7c7b\u53ef\u89c1&#xff09;\u2192 default&#xff08;\u540c\u5305\u53ef\u89c1&#xff09;\u2192 protected&#xff08;\u540c\u5305&#043;\u5b50\u7c7b\u53ef\u89c1&#xff09;\u2192 public&#xff08;\u5168\u5c40\u53ef\u89c1&#xff09;\u3002 \u6838\u5fc3&#xff1a;\u5c5e\u6027\u901a\u5e38\u7528 private \u9690\u85cf&#xff0c;\u65b9\u6cd5\u7528 public \u66b4\u9732\u63a5\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u6b65\u9aa42&#xff1a;\u63d0\u4f9b\u516c\u5171\u7684getter\u65b9\u6cd5&#xff08;\u83b7\u53d6\u5c5e\u6027\u503c&#xff09;\u548csetter\u65b9\u6cd5&#xff08;\u4fee\u6539\u5c5e\u6027\u503c&#xff09;&#xff0c;\u5728\u65b9\u6cd5\u4e2d\u53ef\u6dfb\u52a0\u903b\u8f91\u6821\u9a8c&#xff08;\u5982\u8fc7\u6ee4\u975e\u6cd5\u503c&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>4. \u4ee3\u7801\u793a\u4f8b&#xff1a;\u5c01\u88c5\u4e00\u4e2a\u201c\u4eba\u201d\u7c7b<\/h5>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ 1. \u7528private\u9690\u85cf\u5c5e\u6027&#xff08;\u5916\u90e8\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u59d3\u540d<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5e74\u9f84&#xff08;\u4e0d\u80fd\u4e3a\u8d1f\u6570&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> idCard<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8eab\u4efd\u8bc1\u53f7&#xff08;\u4e0d\u80fd\u4fee\u6539&#xff09;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 2. \u6784\u9020\u65b9\u6cd5&#xff1a;\u521d\u59cb\u5316\u5c5e\u6027&#xff08;\u901a\u8fc7setter\u590d\u7528\u6821\u9a8c\u903b\u8f91&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> idCard<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u8c03\u7528setter\u8bbe\u7f6e\u59d3\u540d<\/span><br \/>\n        <span class=\"token function\">setAge<\/span><span class=\"token punctuation\">(<\/span>age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u8c03\u7528setter\u8bbe\u7f6e\u5e74\u9f84&#xff08;\u542b\u6821\u9a8c&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>idCard <span class=\"token operator\">&#061;<\/span> idCard<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8eab\u4efd\u8bc1\u53f7\u76f4\u63a5\u8d4b\u503c&#xff08;\u4e0d\u63d0\u4f9bsetter&#xff0c;\u7981\u6b62\u4fee\u6539&#xff09;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 3. \u59d3\u540d\u7684getter\u548csetter<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> name<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5141\u8bb8\u5916\u90e8\u83b7\u53d6\u59d3\u540d<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6821\u9a8c&#xff1a;\u59d3\u540d\u4e0d\u80fd\u4e3a\u7a7a<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>name <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">||<\/span> name<span class=\"token punctuation\">.<\/span><span class=\"token function\">trim<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672a\u77e5\u59d3\u540d&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#061;<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 4. \u5e74\u9f84\u7684getter\u548csetter&#xff08;\u542b\u6821\u9a8c&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">getAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6821\u9a8c&#xff1a;\u5e74\u9f84\u4e0d\u80fd\u4e3a\u8d1f\u6570<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>age <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u975e\u6cd5\u503c\u4fee\u6b63\u4e3a0<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">&#061;<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 5. \u8eab\u4efd\u8bc1\u53f7\u4ec5\u63d0\u4f9bgetter&#xff08;\u7981\u6b62\u4fee\u6539&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getIdCard<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> idCard<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 6. \u66b4\u9732\u516c\u5171\u65b9\u6cd5&#xff1a;\u6253\u5370\u4e2a\u4eba\u4fe1\u606f<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">introduce<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6211\u53eb&#034;<\/span> <span class=\"token operator\">&#043;<\/span> name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;&#xff0c;\u5e74\u9f84&#034;<\/span> <span class=\"token operator\">&#043;<\/span> age <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;&#xff0c;\u8eab\u4efd\u8bc1\u53f7&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> idCard<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>5. \u6d4b\u8bd5\u5c01\u88c5\u6548\u679c<\/h5>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TestEncapsulation<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u521b\u5efa\u5bf9\u8c61&#xff08;\u89e6\u53d1\u6784\u9020\u65b9\u6cd5&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">Person<\/span> p <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;110101199001011234&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u4e0d\u80fd\u76f4\u63a5\u8bbf\u95eeprivate\u5c5e\u6027&#xff08;\u7f16\u8bd1\u62a5\u9519&#xff09;<\/span><br \/>\n        <span class=\"token comment\">\/\/ p.age &#061; -10; <\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u901a\u8fc7setter\u4fee\u6539\u5c5e\u6027&#xff08;\u81ea\u52a8\u89e6\u53d1\u6821\u9a8c&#xff09;<\/span><br \/>\n        p<span class=\"token punctuation\">.<\/span><span class=\"token function\">setAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">25<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5408\u6cd5\u5e74\u9f84<\/span><br \/>\n        p<span class=\"token punctuation\">.<\/span><span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5f20\u4e09&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5408\u6cd5\u59d3\u540d<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u901a\u8fc7getter\u83b7\u53d6\u5c5e\u6027<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u83b7\u53d6\u59d3\u540d&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa&#xff1a;\u5f20\u4e09<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u83b7\u53d6\u5e74\u9f84&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u8f93\u51fa&#xff1a;25<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u8c03\u7528\u516c\u5171\u65b9\u6cd5<\/span><br \/>\n        p<span class=\"token punctuation\">.<\/span><span class=\"token function\">introduce<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa&#xff1a;\u6211\u53eb\u5f20\u4e09&#xff0c;\u5e74\u9f8425&#xff0c;\u8eab\u4efd\u8bc1\u53f7&#xff1a;110101199001011234<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u5c1d\u8bd5\u4fee\u6539\u8eab\u4efd\u8bc1\u53f7&#xff08;\u65e0setter&#xff0c;\u65e0\u6cd5\u4fee\u6539&#xff09;<\/span><br \/>\n        <span class=\"token comment\">\/\/ p.idCard &#061; &#034;123&#034;; \/\/ \u7f16\u8bd1\u62a5\u9519<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>6. \u5c01\u88c5\u7684\u6838\u5fc3\u603b\u7ed3<\/h5>\n<ul>\n<li>\u6838\u5fc3\u903b\u8f91&#xff1a;\u201c\u5c5e\u6027\u79c1\u6709&#xff0c;\u65b9\u6cd5\u516c\u5f00\u201d\u3002<\/li>\n<li>\u5173\u952e&#xff1a;\u901a\u8fc7 private \u9690\u85cf\u6570\u636e&#xff0c;\u901a\u8fc7 getter\/setter \u63a7\u5236\u8bbf\u95ee&#xff0c;\u5728\u65b9\u6cd5\u4e2d\u52a0\u5165\u6821\u9a8c\u903b\u8f91\u4fdd\u8bc1\u6570\u636e\u5408\u6cd5\u6027\u3002<\/li>\n<\/ul>\n<h4>\u4e8c\u3001\u7ee7\u627f&#xff08;Inheritance&#xff09;<\/h4>\n<h5>1. \u5b9a\u4e49<\/h5>\n<p>\u7ee7\u627f\u662f\u6307\u8ba9\u4e00\u4e2a\u7c7b&#xff08;\u5b50\u7c7b\/\u6d3e\u751f\u7c7b&#xff09;\u76f4\u63a5\u62e5\u6709\u53e6\u4e00\u4e2a\u7c7b&#xff08;\u7236\u7c7b\/\u57fa\u7c7b&#xff09;\u7684\u5c5e\u6027\u548c\u65b9\u6cd5&#xff0c;\u4ece\u800c\u51cf\u5c11\u4ee3\u7801\u91cd\u590d&#xff0c;\u5b9e\u73b0\u201c\u5171\u6027\u62bd\u53d6&#xff0c;\u4e2a\u6027\u6269\u5c55\u201d\u3002<\/p>\n<p>\u7b80\u5355\u8bf4&#xff1a;\u201c\u5b50\u7c7b\u7ad9\u5728\u7236\u7c7b\u7684\u80a9\u8180\u4e0a&#xff0c;\u65e0\u9700\u91cd\u590d\u7f16\u5199\u7236\u7c7b\u5df2\u6709\u7684\u4ee3\u7801\u201d\u3002<\/p>\n<h5>2. \u6838\u5fc3\u4f5c\u7528<\/h5>\n<ul>\n<li>\u4ee3\u7801\u590d\u7528&#xff1a;\u7236\u7c7b\u5b9a\u4e49\u5171\u6027&#xff08;\u5982\u201c\u52a8\u7269\u201d\u90fd\u6709\u59d3\u540d\u548c\u5e74\u9f84&#xff09;&#xff0c;\u5b50\u7c7b\u7ee7\u627f\u540e\u76f4\u63a5\u4f7f\u7528&#xff0c;\u65e0\u9700\u91cd\u590d\u5b9a\u4e49\u3002<\/li>\n<li>\u6269\u5c55\u529f\u80fd&#xff1a;\u5b50\u7c7b\u53ef\u5728\u7236\u7c7b\u57fa\u7840\u4e0a\u6dfb\u52a0\u65b0\u5c5e\u6027\/\u65b9\u6cd5&#xff08;\u5982\u201c\u732b\u201d\u5728\u201c\u52a8\u7269\u201d\u57fa\u7840\u4e0a\u589e\u52a0\u201c\u6293\u8001\u9f20\u201d\u65b9\u6cd5&#xff09;\u3002<\/li>\n<li>\u591a\u6001\u57fa\u7840&#xff1a;\u7ee7\u627f\u662f\u591a\u6001\u7684\u524d\u63d0&#xff08;\u540e\u7eed\u591a\u6001\u4f9d\u8d56\u7236\u7c7b\u4e0e\u5b50\u7c7b\u7684\u5173\u7cfb&#xff09;\u3002<\/li>\n<\/ul>\n<h5>3. \u5b9e\u73b0\u65b9\u5f0f<\/h5>\n<ul>\n<li>\u7528 extends \u5173\u952e\u5b57\u58f0\u660e\u7ee7\u627f\u5173\u7cfb&#xff1a;\u5b50\u7c7b extends \u7236\u7c7b\u3002<\/li>\n<li>\u7236\u7c7b\u7684\u975e\u79c1\u6709\u6210\u5458&#xff08;public\u3001protected\u3001default&#xff09;\u4f1a\u88ab\u5b50\u7c7b\u7ee7\u627f&#xff08;private \u6210\u5458\u65e0\u6cd5\u7ee7\u627f&#xff0c;\u9700\u901a\u8fc7\u7236\u7c7b\u7684 public \u65b9\u6cd5\u8bbf\u95ee&#xff09;\u3002<\/li>\n<li>Java\u53ea\u652f\u6301\u5355\u7ee7\u627f&#xff08;\u4e00\u4e2a\u5b50\u7c7b\u53ea\u80fd\u6709\u4e00\u4e2a\u76f4\u63a5\u7236\u7c7b&#xff09;&#xff0c;\u4f46\u652f\u6301\u591a\u5c42\u7ee7\u627f&#xff08;\u5982 A extends B&#xff0c;B extends C&#xff09;\u3002<\/li>\n<\/ul>\n<h5>4. \u5173\u952e\u6982\u5ff5<\/h5>\n<ul>\n<li>\n<p>\u65b9\u6cd5\u91cd\u5199&#xff08;Override&#xff09;&#xff1a;\u5b50\u7c7b\u5bf9\u7236\u7c7b\u7684\u65b9\u6cd5\u8fdb\u884c\u91cd\u65b0\u5b9e\u73b0&#xff08;\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u5217\u8868\u3001\u8fd4\u56de\u503c\u5fc5\u987b\u4e0e\u7236\u7c7b\u4e00\u81f4&#xff09;&#xff0c;\u7528\u4e8e\u4fee\u6539\u6216\u6269\u5c55\u7236\u7c7b\u884c\u4e3a\u3002 \u89c4\u5219&#xff1a;<\/p>\n<ul>\n<li>\u5b50\u7c7b\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u66f4\u4e25\u683c&#xff08;\u5982\u7236\u7c7b\u662f public&#xff0c;\u5b50\u7c7b\u4e0d\u80fd\u662f private&#xff09;\u3002<\/li>\n<li>\u5b50\u7c7b\u65b9\u6cd5\u4e0d\u80fd\u629b\u51fa\u6bd4\u7236\u7c7b\u66f4\u591a\u7684\u5f02\u5e38\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>super\u5173\u952e\u5b57&#xff1a;\u7528\u4e8e\u8bbf\u95ee\u7236\u7c7b\u7684\u6210\u5458&#xff08;\u5c5e\u6027\u3001\u65b9\u6cd5\u3001\u6784\u9020\u65b9\u6cd5&#xff09;&#xff1a;<\/p>\n<ul>\n<li>super.\u5c5e\u6027 \/ super.\u65b9\u6cd5()&#xff1a;\u8bbf\u95ee\u7236\u7c7b\u7684\u5c5e\u6027\u6216\u65b9\u6cd5&#xff08;\u89e3\u51b3\u4e0e\u5b50\u7c7b\u6210\u5458\u7684\u547d\u540d\u51b2\u7a81&#xff09;\u3002<\/li>\n<li>super(\u53c2\u6570)&#xff1a;\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5&#xff08;\u5fc5\u987b\u653e\u5728\u5b50\u7c7b\u6784\u9020\u65b9\u6cd5\u7684\u7b2c\u4e00\u884c&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5>5. \u4ee3\u7801\u793a\u4f8b&#xff1a;\u52a8\u7269\u7c7b\u7684\u7ee7\u627f\u5173\u7cfb<\/h5>\n<p><span class=\"token comment\">\/\/ \u7236\u7c7b&#xff1a;\u52a8\u7269&#xff08;\u62bd\u53d6\u5171\u6027&#xff09;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Animal<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u7236\u7c7b\u5c5e\u6027&#xff08;\u975e\u79c1\u6709&#xff0c;\u53ef\u88ab\u5b50\u7c7b\u7ee7\u627f&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">protected<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u59d3\u540d<\/span><br \/>\n    <span class=\"token keyword\">protected<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u5e74\u9f84<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u7236\u7c7b\u6784\u9020\u65b9\u6cd5<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Animal<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#061;<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">&#061;<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u7236\u7c7b\u65b9\u6cd5&#xff1a;\u52a8\u7269\u90fd\u4f1a\u53eb<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u52a8\u7269\u5728\u53eb&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u7236\u7c7b\u65b9\u6cd5&#xff1a;\u83b7\u53d6\u4fe1\u606f<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">getInfo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u59d3\u540d&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;&#xff0c;\u5e74\u9f84&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b50\u7c7b&#xff1a;\u732b&#xff08;\u7ee7\u627f\u81ea\u52a8\u7269&#xff09;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Cat<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">Animal<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u5b50\u7c7b\u65b0\u589e\u5c5e\u6027&#xff08;\u4e2a\u6027&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> color<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6bdb\u8272<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5b50\u7c7b\u6784\u9020\u65b9\u6cd5&#xff1a;\u5fc5\u987b\u5148\u8c03\u7528\u7236\u7c7b\u6784\u9020&#xff08;super&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Cat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> color<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u521d\u59cb\u5316name\u548cage<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>color <span class=\"token operator\">&#061;<\/span> color<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u65b9\u6cd5\u91cd\u5199&#xff1a;\u91cd\u5199\u7236\u7c7b\u7684bark()&#xff0c;\u5b9a\u4e49\u732b\u7684\u53eb\u58f0<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Override<\/span> <span class=\"token comment\">\/\/ \u6ce8\u89e3&#xff1a;\u6821\u9a8c\u662f\u5426\u7b26\u5408\u91cd\u5199\u89c4\u5219&#xff08;\u53ef\u9009\u4f46\u63a8\u8350&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;&#xff08;\u732b&#xff09;\u55b5\u55b5\u53eb&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5b50\u7c7b\u65b0\u589e\u65b9\u6cd5&#xff08;\u4e2a\u6027&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">catchMouse<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>color <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u7684&#034;<\/span> <span class=\"token operator\">&#043;<\/span> name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\u5728\u6293\u8001\u9f20&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91cd\u5199\u7236\u7c7b\u7684getInfo()&#xff0c;\u6dfb\u52a0\u6bdb\u8272\u4fe1\u606f<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">getInfo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getInfo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528\u7236\u7c7b\u7684getInfo()<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6bdb\u8272&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> color<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b50\u7c7b&#xff1a;\u72d7&#xff08;\u7ee7\u627f\u81ea\u52a8\u7269&#xff09;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Dog<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">Animal<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u5b50\u7c7b\u6784\u9020\u65b9\u6cd5<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Dog<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528\u7236\u7c7b\u6784\u9020<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u65b9\u6cd5\u91cd\u5199&#xff1a;\u72d7\u7684\u53eb\u58f0<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;&#xff08;\u72d7&#xff09;\u6c6a\u6c6a\u53eb&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>6. \u6d4b\u8bd5\u7ee7\u627f\u6548\u679c<\/h5>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TestInheritance<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u521b\u5efaCat\u5bf9\u8c61&#xff08;\u5b50\u7c7b&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">Cat<\/span> cat <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Cat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5c0f\u82b1&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u767d\u8272&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        cat<span class=\"token punctuation\">.<\/span><span class=\"token function\">getInfo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u7ee7\u627f\u7236\u7c7b\u7684\u65b9\u6cd5&#xff0c;\u5e76\u91cd\u5199\u6269\u5c55 \u2192 \u8f93\u51fa&#xff1a;\u59d3\u540d&#xff1a;\u5c0f\u82b1&#xff0c;\u5e74\u9f84&#xff1a;2  \u6bdb\u8272&#xff1a;\u767d\u8272<\/span><br \/>\n        cat<span class=\"token punctuation\">.<\/span><span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5 \u2192 \u8f93\u51fa&#xff1a;\u5c0f\u82b1&#xff08;\u732b&#xff09;\u55b5\u55b5\u53eb<\/span><br \/>\n        cat<span class=\"token punctuation\">.<\/span><span class=\"token function\">catchMouse<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b50\u7c7b\u65b0\u589e\u65b9\u6cd5 \u2192 \u8f93\u51fa&#xff1a;\u767d\u8272\u7684\u5c0f\u82b1\u5728\u6293\u8001\u9f20<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u521b\u5efaDog\u5bf9\u8c61&#xff08;\u5b50\u7c7b&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">Dog<\/span> dog <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Dog<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u65fa\u8d22&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        dog<span class=\"token punctuation\">.<\/span><span class=\"token function\">getInfo<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u7ee7\u627f\u7236\u7c7b\u7684\u65b9\u6cd5 \u2192 \u8f93\u51fa&#xff1a;\u59d3\u540d&#xff1a;\u65fa\u8d22&#xff0c;\u5e74\u9f84&#xff1a;3<\/span><br \/>\n        dog<span class=\"token punctuation\">.<\/span><span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5 \u2192 \u8f93\u51fa&#xff1a;\u65fa\u8d22&#xff08;\u72d7&#xff09;\u6c6a\u6c6a\u53eb<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>7. \u7ee7\u627f\u7684\u6838\u5fc3\u603b\u7ed3<\/h5>\n<ul>\n<li>\u6838\u5fc3\u903b\u8f91&#xff1a;\u201c\u5171\u6027\u653e\u7236\u7c7b&#xff0c;\u4e2a\u6027\u653e\u5b50\u7c7b\u201d\u3002<\/li>\n<li>\u5173\u952e&#xff1a;\u901a\u8fc7 extends \u5b9e\u73b0\u7ee7\u627f&#xff0c;super \u8bbf\u95ee\u7236\u7c7b\u6210\u5458&#xff0c;&#064;Override \u91cd\u5199\u7236\u7c7b\u65b9\u6cd5\u3002<\/li>\n<li>\u9650\u5236&#xff1a;Java\u5355\u7ee7\u627f&#xff0c;\u4f46\u53ef\u901a\u8fc7\u63a5\u53e3\u5b9e\u73b0\u591a\u7ee7\u627f\u7c7b\u4f3c\u7684\u6548\u679c\u3002<\/li>\n<\/ul>\n<h4>\u4e09\u3001\u591a\u6001&#xff08;Polymorphism&#xff09;<\/h4>\n<h5>1. \u5b9a\u4e49<\/h5>\n<p>\u591a\u6001\u662f\u6307\u540c\u4e00\u884c\u4e3a&#xff08;\u65b9\u6cd5\u8c03\u7528&#xff09;\u5728\u4e0d\u540c\u5bf9\u8c61\u4e0a\u8868\u73b0\u51fa\u4e0d\u540c\u7684\u5b9e\u73b0\u3002\u5373\u201c\u4e00\u4e2a\u63a5\u53e3&#xff0c;\u591a\u79cd\u5b9e\u73b0\u201d\u3002<\/p>\n<p>\u7b80\u5355\u8bf4&#xff1a;\u201c\u540c\u6837\u7684\u8c03\u7528\u8bed\u53e5&#xff0c;\u56e0\u5bf9\u8c61\u4e0d\u540c&#xff0c;\u6267\u884c\u7ed3\u679c\u4e0d\u540c\u201d\u3002<\/p>\n<h5>2. \u6838\u5fc3\u4f5c\u7528<\/h5>\n<ul>\n<li>\u63d0\u9ad8\u4ee3\u7801\u6269\u5c55\u6027&#xff1a;\u65b0\u589e\u5b50\u7c7b\u65f6&#xff0c;\u65e0\u9700\u4fee\u6539\u539f\u6709\u4ee3\u7801&#xff08;\u7b26\u5408\u201c\u5f00\u95ed\u539f\u5219\u201d&#xff09;\u3002<\/li>\n<li>\u7b80\u5316\u4ee3\u7801\u903b\u8f91&#xff1a;\u7528\u7236\u7c7b\u5f15\u7528\u7edf\u4e00\u7ba1\u7406\u4e0d\u540c\u5b50\u7c7b\u5bf9\u8c61&#xff0c;\u51cf\u5c11\u5206\u652f\u5224\u65ad\u3002<\/li>\n<\/ul>\n<h5>3. \u5b9e\u73b0\u6761\u4ef6<\/h5>\n<p>\u591a\u6001\u7684\u5b9e\u73b0\u5fc5\u987b\u540c\u65f6\u6ee1\u8db33\u4e2a\u6761\u4ef6&#xff1a;<\/p>\n<li>\u7ee7\u627f&#xff1a;\u5b50\u7c7b\u4e0e\u7236\u7c7b\u5b58\u5728\u7ee7\u627f\u5173\u7cfb&#xff08;extends \u6216 implements&#xff09;\u3002<\/li>\n<li>\u91cd\u5199&#xff1a;\u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5&#xff08;\u6838\u5fc3&#xff0c;\u5426\u5219\u591a\u6001\u65e0\u610f\u4e49&#xff09;\u3002<\/li>\n<li>\u5411\u4e0a\u8f6c\u578b&#xff1a;\u7528\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61&#xff08;\u7236\u7c7b\u7c7b\u578b \u53d8\u91cf\u540d &#061; new \u5b50\u7c7b\u7c7b\u578b();&#xff09;\u3002<\/li>\n<h5>4. \u5173\u952e\u6982\u5ff5<\/h5>\n<ul>\n<li>\n<p>\u5411\u4e0a\u8f6c\u578b&#xff1a;\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61&#xff08;\u81ea\u52a8\u5b8c\u6210&#xff09;\u3002 \u4f8b\u5982&#xff1a;Animal animal &#061; new Cat();&#xff08;animal \u662f\u7236\u7c7b\u5f15\u7528&#xff0c;\u6307\u5411\u5b50\u7c7b Cat \u5bf9\u8c61&#xff09;\u3002 \u7279\u70b9&#xff1a;\u7236\u7c7b\u5f15\u7528\u53ea\u80fd\u8c03\u7528\u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5&#xff08;\u6216\u5b50\u7c7b\u91cd\u5199\u7684\u65b9\u6cd5&#xff09;&#xff0c;\u4e0d\u80fd\u8c03\u7528\u5b50\u7c7b\u65b0\u589e\u7684\u65b9\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u5411\u4e0b\u8f6c\u578b&#xff1a;\u5c06\u7236\u7c7b\u5f15\u7528\u5f3a\u5236\u8f6c\u6362\u4e3a\u5b50\u7c7b\u7c7b\u578b&#xff08;\u9700\u663e\u5f0f\u8f6c\u6362&#xff0c;\u4e14\u5fc5\u987b\u5148\u901a\u8fc7 instanceof \u6821\u9a8c&#xff0c;\u5426\u5219\u53ef\u80fd\u629b ClassCastException&#xff09;\u3002 \u4f8b\u5982&#xff1a;if (animal instanceof Cat) { Cat cat &#061; (Cat) animal; }<\/p>\n<\/li>\n<li>\n<p>\u52a8\u6001\u7ed1\u5b9a&#xff1a;\u7a0b\u5e8f\u8fd0\u884c\u65f6&#xff0c;JVM\u4f1a\u6839\u636e\u5b9e\u9645\u5bf9\u8c61\u7684\u7c7b\u578b&#xff08;\u800c\u975e\u5f15\u7528\u7c7b\u578b&#xff09;\u8c03\u7528\u5bf9\u5e94\u7684\u65b9\u6cd5&#xff08;\u5373\u8c03\u7528\u5b50\u7c7b\u91cd\u5199\u7684\u65b9\u6cd5&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>5. \u4ee3\u7801\u793a\u4f8b&#xff1a;\u52a8\u7269\u591a\u6001<\/h5>\n<p>\u57fa\u4e8e\u524d\u9762\u7684 Animal\u3001Cat\u3001Dog \u7c7b&#xff0c;\u6f14\u793a\u591a\u6001&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TestPolymorphism<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ 1. \u5411\u4e0a\u8f6c\u578b&#xff1a;\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61&#xff08;\u591a\u6001\u7684\u6838\u5fc3&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">Animal<\/span> animal1 <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Cat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5c0f\u82b1&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u767d\u8272&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7236\u7c7b\u5f15\u7528\u6307\u5411Cat<\/span><br \/>\n        <span class=\"token class-name\">Animal<\/span> animal2 <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Dog<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u65fa\u8d22&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ \u7236\u7c7b\u5f15\u7528\u6307\u5411Dog<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 2. \u591a\u6001\u4f53\u73b0&#xff1a;\u540c\u6837\u7684\u65b9\u6cd5\u8c03\u7528&#xff0c;\u56e0\u5bf9\u8c61\u4e0d\u540c&#xff0c;\u7ed3\u679c\u4e0d\u540c<\/span><br \/>\n        animal1<span class=\"token punctuation\">.<\/span><span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b9e\u9645\u8c03\u7528Cat\u7684bark() \u2192 \u8f93\u51fa&#xff1a;\u5c0f\u82b1&#xff08;\u732b&#xff09;\u55b5\u55b5\u53eb<\/span><br \/>\n        animal2<span class=\"token punctuation\">.<\/span><span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5b9e\u9645\u8c03\u7528Dog\u7684bark() \u2192 \u8f93\u51fa&#xff1a;\u65fa\u8d22&#xff08;\u72d7&#xff09;\u6c6a\u6c6a\u53eb<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 3. \u7236\u7c7b\u5f15\u7528\u4e0d\u80fd\u76f4\u63a5\u8c03\u7528\u5b50\u7c7b\u65b0\u589e\u7684\u65b9\u6cd5&#xff08;\u7f16\u8bd1\u62a5\u9519&#xff09;<\/span><br \/>\n        <span class=\"token comment\">\/\/ animal1.catchMouse(); <\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 4. \u5411\u4e0b\u8f6c\u578b&#xff1a;\u5c06\u7236\u7c7b\u5f15\u7528\u8f6c\u56de\u5b50\u7c7b\u7c7b\u578b&#xff08;\u9700\u5148\u6821\u9a8c&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>animal1 <span class=\"token keyword\">instanceof<\/span> <span class=\"token class-name\">Cat<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ \u6821\u9a8canimal1\u662f\u5426\u6307\u5411Cat\u5bf9\u8c61<\/span><br \/>\n            <span class=\"token class-name\">Cat<\/span> cat <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Cat<\/span><span class=\"token punctuation\">)<\/span> animal1<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5f3a\u5236\u8f6c\u6362<\/span><br \/>\n            cat<span class=\"token punctuation\">.<\/span><span class=\"token function\">catchMouse<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ \u73b0\u5728\u53ef\u4ee5\u8c03\u7528\u5b50\u7c7b\u65b0\u589e\u65b9\u6cd5 \u2192 \u8f93\u51fa&#xff1a;\u767d\u8272\u7684\u5c0f\u82b1\u5728\u6293\u8001\u9f20<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 5. \u591a\u6001\u7684\u6269\u5c55\u6027&#xff1a;\u65b0\u589e\u5b50\u7c7b\u65f6&#xff0c;\u65e0\u9700\u4fee\u6539\u539f\u6709\u4ee3\u7801<\/span><br \/>\n        <span class=\"token class-name\">Animal<\/span> animal3 <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Bird<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u9e66\u9e49&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u65b0\u589eBird\u7c7b&#xff08;\u7ee7\u627fAnimal&#xff09;<\/span><br \/>\n        animal3<span class=\"token punctuation\">.<\/span><span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528Bird\u91cd\u5199\u7684bark() \u2192 \u8f93\u51fa&#xff1a;\u9e66\u9e49&#xff08;\u9e1f&#xff09;\u5431\u5431\u53eb<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u65b0\u589e\u5b50\u7c7b&#xff1a;\u9e1f&#xff08;\u7ee7\u627f\u81ea\u52a8\u7269&#xff0c;\u6f14\u793a\u6269\u5c55\u6027&#xff09;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Bird<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">Animal<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Bird<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91cd\u5199\u7236\u7c7b\u65b9\u6cd5<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">bark<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;&#xff08;\u9e1f&#xff09;\u5431\u5431\u53eb&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>6. \u591a\u6001\u7684\u6838\u5fc3\u603b\u7ed3<\/h5>\n<ul>\n<li>\u6838\u5fc3\u903b\u8f91&#xff1a;\u201c\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61&#xff0c;\u8c03\u7528\u65b9\u6cd5\u65f6\u6267\u884c\u5b50\u7c7b\u91cd\u5199\u7684\u5b9e\u73b0\u201d\u3002<\/li>\n<li>\u672c\u8d28&#xff1a;\u52a8\u6001\u7ed1\u5b9a&#xff08;\u8fd0\u884c\u65f6\u786e\u5b9a\u8c03\u7528\u54ea\u4e2a\u5b50\u7c7b\u7684\u65b9\u6cd5&#xff09;\u3002<\/li>\n<li>\u4f18\u52bf&#xff1a;\u65b0\u589e\u5b50\u7c7b\u65f6&#xff0c;\u53ea\u9700\u91cd\u5199\u7236\u7c7b\u65b9\u6cd5&#xff0c;\u539f\u6709\u4ee3\u7801&#xff08;\u5982\u7236\u7c7b\u5f15\u7528\u7684\u8c03\u7528&#xff09;\u65e0\u9700\u4fee\u6539&#xff0c;\u5927\u5e45\u63d0\u9ad8\u6269\u5c55\u6027\u3002<\/li>\n<\/ul>\n<h4>\u56db\u3001\u4e09\u5927\u7279\u5f81\u7684\u8054\u7cfb\u4e0e\u603b\u7ed3<\/h4>\n<li>\u5c01\u88c5\u662f\u57fa\u7840&#xff1a;\u901a\u8fc7\u9690\u85cf\u6570\u636e\u548c\u66b4\u9732\u63a5\u53e3&#xff0c;\u4fdd\u8bc1\u6570\u636e\u5b89\u5168&#xff0c;\u4e3a\u7ee7\u627f\u548c\u591a\u6001\u63d0\u4f9b\u53ef\u9760\u7684\u201c\u6784\u4ef6\u201d\u3002<\/li>\n<li>\u7ee7\u627f\u662f\u6865\u6881&#xff1a;\u5b9e\u73b0\u4ee3\u7801\u590d\u7528&#xff0c;\u5efa\u7acb\u7c7b\u4e4b\u95f4\u7684\u5c42\u6b21\u5173\u7cfb&#xff0c;\u662f\u591a\u6001\u7684\u524d\u63d0&#xff08;\u6ca1\u6709\u7ee7\u627f\u5c31\u6ca1\u6709\u591a\u6001&#xff09;\u3002<\/li>\n<li>\u591a\u6001\u662f\u76ee\u6807&#xff1a;\u57fa\u4e8e\u5c01\u88c5\u548c\u7ee7\u627f&#xff0c;\u5b9e\u73b0\u4ee3\u7801\u7684\u7075\u6d3b\u6027\u548c\u6269\u5c55\u6027&#xff0c;\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6700\u7ec8\u4f53\u73b0\u3002<\/li>\n<p>\u4e09\u8005\u534f\u540c\u5de5\u4f5c&#xff0c;\u4f7fJava\u4ee3\u7801\u66f4\u6613\u4e8e\u7ef4\u62a4\u3001\u6269\u5c55\u548c\u590d\u7528&#xff0c;\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6838\u5fc3\u601d\u60f3\u3002<\/p>\n<p>\u7ec3\u4e60\u9898<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb37\u6b21\u3002\u5c01\u88c5\u662f\u6307\u5c06\u5bf9\u8c61\u7684\u5c5e\u6027\uff08\u6570\u636e\uff09\u548c\u65b9\u6cd5\uff08\u64cd\u4f5c\uff09\u6346\u7ed1\u5728\u4e00\u8d77\uff0c\u5e76\u901a\u8fc7\u8bbf\u95ee\u63a7\u5236\u7b26\u9650\u5236\u5916\u90e8\u5bf9\u5185\u90e8\u7ec6\u8282\u7684\u76f4\u63a5\u8bbf\u95ee\uff0c\u4ec5\u66b4\u9732\u5fc5\u8981\u7684\u63a5\u53e3\uff08\u65b9\u6cd5\uff09\u3002\u7b80\u5355\u8bf4\uff1a\u201c\u9690\u85cf\u5185\u90e8\u5b9e\u73b0\uff0c\u53ea\u7559\u8bbf\u95ee\u5165\u53e3\u201d\u3002\u201c\u5c5e\u6027\u79c1\u6709\uff0c\u65b9\u6cd5\u516c\u5f00\u201d\u3002\u5173\u952e\uff1a\u901a\u8fc7private\u9690\u85cf\u6570\u636e\uff0c\u901a\u8fc7\u63a7\u5236\u8bbf\u95ee\uff0c\u5728\u65b9\u6cd5\u4e2d\u52a0\u5165\u6821\u9a8c\u903b\u8f91\u4fdd\u8bc1\u6570\u636e\u5408\u6cd5\u6027\u3002\u7ee7\u627f\u662f\u6307\u8ba9\u4e00\u4e2a\u7c7b\uff08\u5b50\u7c7b\/\u6d3e\u751f\u7c7b\uff09\u76f4\u63a5\u62e5\u6709\u53e6\u4e00\u4e2a\u7c7b\uff08\u7236\u7c7b\/\u57fa\u7c7b\uff09\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ece\u800c\u51cf\u5c11\u4ee3\u7801\u91cd\u590d\uff0c\u5b9e\u73b0\u201c\u5171\u6027\u62bd\u53d6\uff0c\u4e2a\u6027\u6269\u5c55\u201d\u3002\u7b80\u5355\u8bf4\uff1a\u201c\u5b50\u7c7b\u7ad9\u5728\u7236\u7c7b\u7684\u80a9\u8180\u4e0a\uff0c\u65e0\u9700\u91cd\u590d\u7f16\u5199\u7236\u7c7b\u5df2\u6709\u7684\u4ee3\u7801\u201d\u3002\u201c\u5171\u6027\u653e\u7236\u7c7b\uff0c\u4e2a\u6027\u653e\u5b50\u7c7b\u201d\u3002\u5173\u952e\uff1a\u901a\u8fc7\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1874,99,190],"topic":[],"class_list":{"0":"post-53836","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-server","7":"tag-java","9":"tag-190"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/53836.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb37\u6b21\u3002\u5c01\u88c5\u662f\u6307\u5c06\u5bf9\u8c61\u7684\u5c5e\u6027\uff08\u6570\u636e\uff09\u548c\u65b9\u6cd5\uff08\u64cd\u4f5c\uff09\u6346\u7ed1\u5728\u4e00\u8d77\uff0c\u5e76\u901a\u8fc7\u8bbf\u95ee\u63a7\u5236\u7b26\u9650\u5236\u5916\u90e8\u5bf9\u5185\u90e8\u7ec6\u8282\u7684\u76f4\u63a5\u8bbf\u95ee\uff0c\u4ec5\u66b4\u9732\u5fc5\u8981\u7684\u63a5\u53e3\uff08\u65b9\u6cd5\uff09\u3002\u7b80\u5355\u8bf4\uff1a\u201c\u9690\u85cf\u5185\u90e8\u5b9e\u73b0\uff0c\u53ea\u7559\u8bbf\u95ee\u5165\u53e3\u201d\u3002\u201c\u5c5e\u6027\u79c1\u6709\uff0c\u65b9\u6cd5\u516c\u5f00\u201d\u3002\u5173\u952e\uff1a\u901a\u8fc7private\u9690\u85cf\u6570\u636e\uff0c\u901a\u8fc7\u63a7\u5236\u8bbf\u95ee\uff0c\u5728\u65b9\u6cd5\u4e2d\u52a0\u5165\u6821\u9a8c\u903b\u8f91\u4fdd\u8bc1\u6570\u636e\u5408\u6cd5\u6027\u3002\u7ee7\u627f\u662f\u6307\u8ba9\u4e00\u4e2a\u7c7b\uff08\u5b50\u7c7b\/\u6d3e\u751f\u7c7b\uff09\u76f4\u63a5\u62e5\u6709\u53e6\u4e00\u4e2a\u7c7b\uff08\u7236\u7c7b\/\u57fa\u7c7b\uff09\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ece\u800c\u51cf\u5c11\u4ee3\u7801\u91cd\u590d\uff0c\u5b9e\u73b0\u201c\u5171\u6027\u62bd\u53d6\uff0c\u4e2a\u6027\u6269\u5c55\u201d\u3002\u7b80\u5355\u8bf4\uff1a\u201c\u5b50\u7c7b\u7ad9\u5728\u7236\u7c7b\u7684\u80a9\u8180\u4e0a\uff0c\u65e0\u9700\u91cd\u590d\u7f16\u5199\u7236\u7c7b\u5df2\u6709\u7684\u4ee3\u7801\u201d\u3002\u201c\u5171\u6027\u653e\u7236\u7c7b\uff0c\u4e2a\u6027\u653e\u5b50\u7c7b\u201d\u3002\u5173\u952e\uff1a\u901a\u8fc7\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/53836.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-12T09:49:36+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/53836.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/53836.html\",\"name\":\"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2025-08-12T09:49:36+00:00\",\"dateModified\":\"2025-08-12T09:49:36+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/53836.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/53836.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/53836.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/53836.html","og_locale":"zh_CN","og_type":"article","og_title":"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb37\u6b21\u3002\u5c01\u88c5\u662f\u6307\u5c06\u5bf9\u8c61\u7684\u5c5e\u6027\uff08\u6570\u636e\uff09\u548c\u65b9\u6cd5\uff08\u64cd\u4f5c\uff09\u6346\u7ed1\u5728\u4e00\u8d77\uff0c\u5e76\u901a\u8fc7\u8bbf\u95ee\u63a7\u5236\u7b26\u9650\u5236\u5916\u90e8\u5bf9\u5185\u90e8\u7ec6\u8282\u7684\u76f4\u63a5\u8bbf\u95ee\uff0c\u4ec5\u66b4\u9732\u5fc5\u8981\u7684\u63a5\u53e3\uff08\u65b9\u6cd5\uff09\u3002\u7b80\u5355\u8bf4\uff1a\u201c\u9690\u85cf\u5185\u90e8\u5b9e\u73b0\uff0c\u53ea\u7559\u8bbf\u95ee\u5165\u53e3\u201d\u3002\u201c\u5c5e\u6027\u79c1\u6709\uff0c\u65b9\u6cd5\u516c\u5f00\u201d\u3002\u5173\u952e\uff1a\u901a\u8fc7private\u9690\u85cf\u6570\u636e\uff0c\u901a\u8fc7\u63a7\u5236\u8bbf\u95ee\uff0c\u5728\u65b9\u6cd5\u4e2d\u52a0\u5165\u6821\u9a8c\u903b\u8f91\u4fdd\u8bc1\u6570\u636e\u5408\u6cd5\u6027\u3002\u7ee7\u627f\u662f\u6307\u8ba9\u4e00\u4e2a\u7c7b\uff08\u5b50\u7c7b\/\u6d3e\u751f\u7c7b\uff09\u76f4\u63a5\u62e5\u6709\u53e6\u4e00\u4e2a\u7c7b\uff08\u7236\u7c7b\/\u57fa\u7c7b\uff09\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ece\u800c\u51cf\u5c11\u4ee3\u7801\u91cd\u590d\uff0c\u5b9e\u73b0\u201c\u5171\u6027\u62bd\u53d6\uff0c\u4e2a\u6027\u6269\u5c55\u201d\u3002\u7b80\u5355\u8bf4\uff1a\u201c\u5b50\u7c7b\u7ad9\u5728\u7236\u7c7b\u7684\u80a9\u8180\u4e0a\uff0c\u65e0\u9700\u91cd\u590d\u7f16\u5199\u7236\u7c7b\u5df2\u6709\u7684\u4ee3\u7801\u201d\u3002\u201c\u5171\u6027\u653e\u7236\u7c7b\uff0c\u4e2a\u6027\u653e\u5b50\u7c7b\u201d\u3002\u5173\u952e\uff1a\u901a\u8fc7\u3002","og_url":"https:\/\/www.wsisp.com\/helps\/53836.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2025-08-12T09:49:36+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"4 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/53836.html","url":"https:\/\/www.wsisp.com\/helps\/53836.html","name":"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2025-08-12T09:49:36+00:00","dateModified":"2025-08-12T09:49:36+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/53836.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/53836.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/53836.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u4e09\u5927\u6838\u5fc3\u7279\u5f81"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/53836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=53836"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/53836\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=53836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=53836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=53836"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=53836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}