{"id":94012,"date":"2026-08-13T13:48:45","date_gmt":"2026-08-13T05:48:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/94012.html"},"modified":"2026-08-13T13:48:45","modified_gmt":"2026-08-13T05:48:45","slug":"java%e6%9e%84%e9%80%a0%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/94012.html","title":{"rendered":"Java\u6784\u9020\u65b9\u6cd5"},"content":{"rendered":"<h3>1. \u4e3a\u4ec0\u4e48\u9700\u8981\u6784\u9020\u65b9\u6cd5<\/h3>\n<li>\n<p>\u4ee3\u7801\u5197\u4f59\u4e0e\u9057\u6f0f\u98ce\u9669&#xff1a;\u521b\u5efa\u5bf9\u8c61\u540e&#xff0c;\u5982\u679c\u4ec5\u4f7f\u7528 setter \u65b9\u6cd5\u9010\u4e00\u521d\u59cb\u5316\u5b57\u6bb5&#xff0c;\u9700\u8981\u7f16\u5199\u591a\u884c\u4ee3\u7801&#xff0c;\u4e14\u5bb9\u6613\u9057\u6f0f\u8c03\u7528\u67d0\u4e9b setter&#xff0c;\u5bfc\u81f4\u5bf9\u8c61\u72b6\u6001\u4e0d\u5b8c\u6574\u3002<\/p>\n<\/li>\n<li>\n<p>\u6784\u9020\u65b9\u6cd5\u7684\u4f18\u52bf&#xff1a;\u6784\u9020\u65b9\u6cd5\u5141\u8bb8\u5728\u521b\u5efa\u5bf9\u8c61\u7684\u77ac\u95f4\u5b8c\u6210\u6240\u6709\u5fc5\u8981\u5b57\u6bb5\u7684\u521d\u59cb\u5316&#xff0c;\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01&#xff0c;\u5e76\u5f3a\u5236\u63d0\u4f9b\u5b8c\u6574\u521d\u59cb\u72b6\u6001&#xff0c;\u4ece\u800c\u66f4\u5b89\u5168\u3002<\/p>\n<\/li>\n<p>\u793a\u4f8b\u5bf9\u6bd4&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528 setter&#xff08;\u6613\u51fa\u9519&#xff09;&#xff1a;<span class=\"token class-name\">Person<\/span> ming <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 punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nming<span class=\"token punctuation\">.<\/span><span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nming<span class=\"token punctuation\">.<\/span><span class=\"token function\">setAge<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u82e5\u5fd8\u8bb0\u6b64\u8c03\u7528&#xff0c;age \u5c06\u4fdd\u6301\u9ed8\u8ba4\u503c 0<\/span><\/p>\n<\/li>\n<li>\u4f7f\u7528\u6784\u9020\u65b9\u6cd5&#xff08;\u63a8\u8350&#xff09;&#xff1a;<span class=\"token class-name\">Person<\/span> ming <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;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">12<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4e00\u884c\u4ee3\u7801&#xff0c;\u5f3a\u5236\u5b8c\u6210\u521d\u59cb\u5316<\/span>\n<\/li>\n<\/ul>\n<h3>2. \u4ec0\u4e48\u662f\u6784\u9020\u65b9\u6cd5&#xff1f;<\/h3>\n<p>\u6784\u9020\u65b9\u6cd5\u662f\u4e00\u79cd\u7279\u6b8a\u65b9\u6cd5&#xff0c;\u7528\u6765\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u5bf9\u8c61\u5b57\u6bb5\u3002<\/p>\n<p>\u8bed\u6cd5\u793a\u4f8b<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6784\u9020\u65b9\u6cd5<\/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 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 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><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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 punctuation\">}<\/span><\/p>\n<p>\u8c03\u7528<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/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 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;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">15<\/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>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\">\/\/ \u5c0f\u660e<\/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>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\">\/\/ 15<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>3. \u6784\u9020\u65b9\u6cd5\u7684\u7279\u70b9<\/h3>\n<li>\u65b9\u6cd5\u540d\u5fc5\u987b\u548c\u7c7b\u540d\u5b8c\u5168\u76f8\u540c&#xff1a;\u7c7b\u53eb Person&#xff0c;\u6784\u9020\u65b9\u6cd5\u4e5f\u5fc5\u987b\u53eb Person\u3002<\/li>\n<p>2.\u6ca1\u6709\u8fd4\u56de\u503c\u7c7b\u578b<br \/>\n\u666e\u901a\u65b9\u6cd5\u53ef\u80fd\u5199\u6210<\/p>\n<p><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><\/p>\n<p>\u800c\u6784\u9020\u65b9\u6cd5\u4e0d\u80fd\u5199\u8fd4\u56de\u7c7b\u578b&#xff0c;\u4f8b\u5982 public Person()&#xff0c;\u4e0d\u80fd\u5199\u6210 public void Person()\u3002<\/p>\n<p>3.\u5fc5\u987b\u901a\u8fc7 new \u8c03\u7528<br \/>\n\u6784\u9020\u65b9\u6cd5\u4e0d\u80fd\u50cf\u666e\u901a\u65b9\u6cd5\u90a3\u6837\u76f4\u63a5\u8c03\u7528&#xff1a;<\/p>\n<p><span class=\"token class-name\"><span class=\"token namespace\">p<span class=\"token punctuation\">.<\/span><\/span>Person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u9519\u8bef<\/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;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/new\u8c03\u7528&#xff0c;\u6b63\u786e<\/span><\/p>\n<p>4.\u53ef\u4ee5\u91cd\u8f7d<br \/>\n\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u6709\u591a\u4e2a\u6784\u9020\u65b9\u6cd5&#xff0c;\u53c2\u6570\u5217\u8868\u4e0d\u540c\u3002<\/p>\n<h3>4. \u9ed8\u8ba4\u6784\u9020\u65b9\u6cd5<\/h3>\n<p>\u5982\u679c\u4e00\u4e2a\u7c7b\u6ca1\u6709\u5b9a\u4e49\u4efb\u4f55\u6784\u9020\u65b9\u6cd5&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u751f\u6210\u7c7b\u4f3c\u8fd9\u6837\u7684\u6784\u9020\u65b9\u6cd5&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u7a7a\u6784\u9020\u65b9\u6cd5<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5&#xff1a;<\/p>\n<p><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 punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u91cd\u8981\u89c4\u5219<br \/>\n\u4e00\u65e6\u4f60\u81ea\u5df1\u5b9a\u4e49\u4e86\u4efb\u610f\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5&#xff0c;\u7f16\u8bd1\u5668\u5c31\u4e0d\u518d\u81ea\u52a8\u751f\u6210\u9ed8\u8ba4\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <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 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><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u65f6\u518d\u5199&#xff1a;<\/p>\n<p><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 punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7f16\u8bd1\u9519\u8bef&#xff01;\u627e\u4e0d\u5230\u65e0\u53c2\u6784\u9020\u65b9\u6cd5<\/span><\/p>\n<p>\u56e0\u4e3a\u7f16\u8bd1\u5668\u4e0d\u518d\u81ea\u52a8\u63d0\u4f9b Person()\u3002<\/p>\n<p>\u5982\u679c\u65e2\u60f3\u8981\u65e0\u53c2\u6784\u9020\u65b9\u6cd5&#xff0c;\u53c8\u60f3\u8981\u6709\u53c2\u6784\u9020\u65b9\u6cd5&#xff0c;\u5fc5\u987b\u624b\u52a8\u628a\u4e24\u4e2a\u90fd\u5199\u51fa\u6765&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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 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>}<\/p>\n<h3>5. \u5b57\u6bb5\u9ed8\u8ba4\u503c<\/h3>\n<p>\u5982\u679c\u6784\u9020\u65b9\u6cd5\u6ca1\u6709\u7ed9\u5b57\u6bb5\u8d4b\u503c&#xff0c;\u5b57\u6bb5\u4f1a\u4f7f\u7528\u9ed8\u8ba4\u503c\u3002<\/p>\n<p>\u7c7b\u578b                              \u9ed8\u8ba4\u503c<br \/>\nbyte \/ short \/ int \/ long               <span class=\"token number\">0<\/span><br \/>\nfloat \/ double                       <span class=\"token number\">0.0<\/span><br \/>\nchar                                <span class=\"token string\">&#039;\\\\u0000&#039;<\/span><br \/>\nboolean                              <span class=\"token boolean\">false<\/span><br \/>\n\u5f15\u7528\u7c7b\u578b&#xff0c;\u4f8b\u5982 String               null<\/p>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/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 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 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>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\">\/\/null<\/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>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\">\/\/0<\/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>p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getVip<\/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\">\/\/false<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">boolean<\/span> vip<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">}<\/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 keyword\">boolean<\/span> vip<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 keyword\">this<\/span><span class=\"token punctuation\">.<\/span>vip <span class=\"token operator\">&#061;<\/span> vip<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/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><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 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 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\">boolean<\/span> <span class=\"token function\">getVip<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> vip<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>6. \u5b57\u6bb5\u521d\u59cb\u5316\u5668<\/h3>\n<p>\u6211\u4eec\u53ef\u4ee5\u5728\u58f0\u660e\u5b57\u6bb5\u65f6\u76f4\u63a5\u8d4b\u521d\u503c&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672a\u547d\u540d&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u6837\u5373\u4f7f\u6784\u9020\u65b9\u6cd5\u6ca1\u6709\u7ed9\u5b57\u6bb5\u8d4b\u503c&#xff0c;\u5b57\u6bb5\u4e5f\u6709\u9ed8\u8ba4\u7684\u521d\u59cb\u503c\u3002<\/p>\n<h3>7. \u6784\u9020\u65b9\u6cd5\u91cd\u8f7d<\/h3>\n<li>\n<p>\u91cd\u8f7d&#xff1a;\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d&#xff0c;\u5141\u8bb8\u5b9a\u4e49\u591a\u4e2a\u6784\u9020\u65b9\u6cd5&#xff0c;\u53ea\u8981\u5b83\u4eec\u7684\u53c2\u6570\u5217\u8868\u4e0d\u540c&#xff08;\u53c2\u6570\u4e2a\u6570\u3001\u7c7b\u578b\u6216\u987a\u5e8f\u4e0d\u540c&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u91cd\u8f7d\u7684\u76ee\u7684&#xff1a;\u63d0\u4f9b\u591a\u79cd\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u5f0f&#xff0c;\u8ba9\u4f7f\u7528\u8005\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u7075\u6d3b\u4f20\u53c2&#xff0c;\u800c\u4e0d\u5fc5\u4e3a\u6bcf\u79cd\u60c5\u51b5\u5199\u4e0d\u540c\u7684\u65b9\u6cd5\u540d\u3002<\/p>\n<\/li>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6784\u9020\u65b9\u6cd5\u2460&#xff1a;\u4e24\u4e2a\u53c2\u6570<\/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 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\">\/\/ \u6784\u9020\u65b9\u6cd5\u2461&#xff1a;\u4e00\u4e2a\u53c2\u6570&#xff08;String&#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 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> <span class=\"token number\">18<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6784\u9020\u65b9\u6cd5\u2462&#xff1a;\u65e0\u53c2\u6570<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Person<\/span><span class=\"token punctuation\">(<\/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<li>\u8c03\u7528\u65f6&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u53c2\u6570\u81ea\u52a8\u5339\u914d&#xff1a;\u5f53\u4f60\u7528 new \u521b\u5efa\u5bf9\u8c61\u5e76\u4f20\u5165\u5b9e\u53c2\u65f6&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u5b9e\u53c2\u7684\u4e2a\u6570\u3001\u7c7b\u578b\u548c\u987a\u5e8f&#xff0c;\u53bb\u5339\u914d\u6700\u5408\u9002\u7684\u6784\u9020\u65b9\u6cd5\u3002<\/li>\n<p><span class=\"token class-name\">Person<\/span> p1 <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;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528 Person(String, int)<\/span><br \/>\n<span class=\"token comment\">\/*<br \/>\n  \u4f20\u5165\u5b9e\u53c2&#xff1a;&#034;\u5c0f\u660e&#034;&#xff08;String&#xff09;\u300120&#xff08;int&#xff09;<br \/>\n  \u5339\u914d\u5230\u6784\u9020\u65b9\u6cd5\u2460 Person(String, int)<br \/>\n  \u6267\u884c&#xff1a;this.name &#061; &#034;\u5c0f\u660e&#034;&#xff0c;this.age &#061; 20<br \/>\n  \u7ed3\u679c&#xff1a;p1 \u5bf9\u8c61\u7684 name &#061; &#034;\u5c0f\u660e&#034;&#xff0c;age &#061; 20<br \/>\n*\/<\/span><br \/>\n<span class=\"token class-name\">Person<\/span> p2 <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;\u5c0f\u7ea2&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u8c03\u7528 Person(String)<\/span><br \/>\n<span class=\"token class-name\">Person<\/span> p3 <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 punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ \u8c03\u7528 Person()<\/span><\/p>\n<li>\u4e3a\u4ec0\u4e48\u8981\u8fd9\u6837\u8bbe\u8ba1&#xff1f;\n<ul>\n<li>\u63d0\u4f9b\u7075\u6d3b\u6027&#xff1a;\u8c03\u7528\u8005\u53ef\u4ee5\u53ea\u7ed9\u540d\u5b57&#xff08;\u5e74\u9f84\u81ea\u52a8\u6210\u5e74&#xff09;&#xff0c;\u4e5f\u53ef\u4ee5\u7ed9\u540d\u5b57&#043;\u5e74\u9f84&#xff0c;\u751a\u81f3\u53ef\u4ee5\u5b8c\u5168\u9ed8\u8ba4&#xff08;\u6bd4\u5982\u7528\u4e8e\u540e\u7eed setter \u8d4b\u503c&#xff09;\u3002<\/li>\n<li>\u51cf\u5c11\u91cd\u590d\u4ee3\u7801&#xff1a;\u5982\u679c\u6ca1\u6709\u91cd\u8f7d&#xff0c;\u4f60\u53ef\u80fd\u9700\u8981\u5199 setName()\u3001setAge() \u6216\u8005\u591a\u4e2a\u4e0d\u540c\u540d\u7684\u521b\u5efa\u65b9\u6cd5&#xff0c;\u800c\u91cd\u8f7d\u8ba9 new \u672c\u8eab\u5c31\u5b8c\u6210\u4e86\u5dee\u5f02\u5316\u521d\u59cb\u5316\u3002<\/li>\n<\/ul>\n<\/li>\n<h3>8. \u7528 this(\u2026) \u8c03\u7528\u5176\u4ed6\u6784\u9020\u65b9\u6cd5<\/h3>\n<p>\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\u53ef\u4ee5\u8c03\u7528\u53e6\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5&#xff0c;\u8bed\u6cd5\u662f this(\u53c2\u6570\u2026)\u3002<\/p>\n<p>\u4f5c\u7528&#xff1a;\u590d\u7528\u521d\u59cb\u5316\u903b\u8f91&#xff0c;\u907f\u514d\u91cd\u590d\u4ee3\u7801\u3002<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <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 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 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 punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> <span class=\"token number\">18<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528 Person(String, int)<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Person<\/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><span class=\"token string\">&#034;\u672a\u547d\u540d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528 Person(String)<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u610f&#xff1a;this(\u2026) \u5fc5\u987b\u5199\u5728\u6784\u9020\u65b9\u6cd5\u7684\u7b2c\u4e00\u884c\u3002<\/p>\n<p>\u9519\u8bef\u5199\u6cd5&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Person<\/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;\u521d\u59cb\u5316&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u672a\u547d\u540d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7f16\u8bd1\u9519\u8bef&#xff0c;this(&#8230;)\u5fc5\u987b\u653e\u5728\u7b2c\u4e00\u884c<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>9. \u5b57\u6bb5\u521d\u59cb\u5316\u4e0e\u6784\u9020\u65b9\u6cd5\u7684\u6267\u884c\u987a\u5e8f<\/h3>\n<p>\u521b\u5efa\u5bf9\u8c61\u65f6&#xff0c;Java \u6309\u4ee5\u4e0b\u987a\u5e8f\u521d\u59cb\u5316&#xff1a;<\/p>\n<li>\u5148\u7ed9\u5b57\u6bb5\u5206\u914d\u9ed8\u8ba4\u503c&#xff1a;\u4f8b\u5982 String name \u5148\u53d8\u6210 null&#xff0c;int age \u5148\u53d8\u6210 0\u3002<\/li>\n<li>\u6267\u884c\u5b57\u6bb5\u521d\u59cb\u5316\u5668&#xff1a;\u4f8b\u5982&#xff1a;<span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672a\u547d\u540d&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u65f6 name \u53d8\u6210 \u201c\u672a\u547d\u540d\u201d&#xff0c;age \u53d8\u6210 10\u3002<\/li>\n<li>\u6267\u884c\u6784\u9020\u65b9\u6cd5\u4f53\u7684\u4ee3\u7801&#xff1a;\u5982\u679c\u6784\u9020\u65b9\u6cd5\u4f53\u4e2d\u518d\u6b21\u7ed9\u5b57\u6bb5\u8d4b\u503c&#xff0c;\u4f1a\u8986\u76d6\u524d\u9762\u7684\u503c\u3002<br \/>\n1.\u5148\u7ed9\u5b57\u6bb5\u5206\u914d\u9ed8\u8ba4\u503c\u3002<br \/>\n\u4f8b\u5982 String name \u5148\u53d8\u6210 null&#xff0c;int age \u5148\u53d8\u6210 0\u3002<\/li>\n<p>2.\u6267\u884c\u5b57\u6bb5\u521d\u59cb\u5316\u5668\u3002<br \/>\n\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672a\u547d\u540d&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u65f6 name \u53d8\u6210 \u201c\u672a\u547d\u540d\u201d&#xff0c;age \u53d8\u6210 10\u3002<\/p>\n<p>\u6267\u884c\u6784\u9020\u65b9\u6cd5\u4f53\u7684\u4ee3\u7801\u3002<br \/>\n\u5982\u679c\u6784\u9020\u65b9\u6cd5\u4f53\u4e2d\u518d\u6b21\u7ed9\u5b57\u6bb5\u8d4b\u503c&#xff0c;\u4f1a\u8986\u76d6\u524d\u9762\u7684\u503c\u3002<\/p>\n<p>\u793a\u4f8b<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672a\u547d\u540d&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <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 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><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6267\u884c&#xff1a;<\/p>\n<p><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;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">12<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fc7\u7a0b&#xff1a;<\/p>\n<p>name \u521d\u59cb\u4e3a null&#xff0c;age \u521d\u59cb\u4e3a 0<\/p>\n<p>\u5b57\u6bb5\u521d\u59cb\u5316\u5668\u6267\u884c&#xff1a;name &#061; \u201c\u672a\u547d\u540d\u201d&#xff0c;age &#061; 10<\/p>\n<p>\u6784\u9020\u65b9\u6cd5\u4f53\u6267\u884c&#xff1a;name &#061; \u201c\u5c0f\u660e\u201d&#xff0c;age &#061; 12<\/p>\n<p>\u6700\u7ec8\u7ed3\u679c&#xff1a;<\/p>\n<p>java<br \/>\np.getName(); \/\/ \u5c0f\u660e<br \/>\np.getAge();  \/\/ 12<br \/>\n\u6240\u4ee5&#xff1a;\u5b57\u6bb5\u521d\u59cb\u5316\u5668\u5148\u6267\u884c&#xff0c;\u6784\u9020\u65b9\u6cd5\u4f53\u540e\u6267\u884c&#xff0c;\u6700\u7ec8\u503c\u7531\u6784\u9020\u65b9\u6cd5\u4f53\u51b3\u5b9a\u3002<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/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 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;&gt;&gt;&gt; \u5f00\u59cb\u6267\u884c new Person(\\\\&#034;\u5c0f\u660e\\\\&#034;, 12) &lt;&lt;&lt;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/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;\u5c0f\u660e&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">12<\/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;&gt;&gt;&gt; new \u64cd\u4f5c\u6267\u884c\u5b8c\u6bd5 &lt;&lt;&lt;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        p<span class=\"token punctuation\">.<\/span><span class=\"token function\">show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 1. \u5b57\u6bb5\u5b9a\u4e49 &#043; \u5b57\u6bb5\u521d\u59cb\u5316\u5668 (\u5e26\u6253\u5370)<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u672a\u547d\u540d&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 2. \u5b9e\u4f8b\u521d\u59cb\u5316\u5757 (\u5b83\u5728\u5b57\u6bb5\u521d\u59cb\u5316\u5668\u4e4b\u540e\u3001\u6784\u9020\u65b9\u6cd5\u4f53\u4e4b\u524d\u6267\u884c)<\/span><br \/>\n    <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;\u3010\u6b65\u9aa43\u3011\u6267\u884c \u5b9e\u4f8b\u521d\u59cb\u5316\u5757 { } \u5185\u7684\u4ee3\u7801&#034;<\/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;       \u6b64\u65f6 name &#061; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;, age &#061; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5047\u8bbe\u8fd9\u91cc\u5077\u5077\u6539\u4e00\u4e0b\u5e74\u9f84&#xff0c;\u770b\u770b\u4f1a\u4e0d\u4f1a\u88ab\u6784\u9020\u65b9\u6cd5\u8986\u76d6<\/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\">99<\/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;       \u521d\u59cb\u5316\u5757\u6267\u884c\u5b8c\u6bd5&#xff0c;age \u88ab\u6539\u4e3a 99&#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\">\/\/ 3. \u6784\u9020\u65b9\u6cd5\u4f53<\/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 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;\u3010\u6b65\u9aa44\u3011\u8fdb\u5165 \u6784\u9020\u65b9\u6cd5\u4f53  public Person(String name, int age)&#034;<\/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;       \u6267\u884c\u6784\u9020\u65b9\u6cd5\u524d&#xff1a;this.name &#061; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;, this.age &#061; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <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><\/p>\n<p>        <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;       \u6267\u884c\u6784\u9020\u65b9\u6cd5\u540e&#xff1a;this.name &#061; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;, this.age &#061; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token keyword\">this<\/span><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\">\/\/ \u7528\u6765\u67e5\u770b\u6700\u7ec8\u7ed3\u679c\u7684\u666e\u901a\u65b9\u6cd5<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">show<\/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;\u3010\u6700\u7ec8\u5bf9\u8c61\u7ed3\u679c\u3011name &#061; &#034;<\/span> <span class=\"token operator\">&#043;<\/span> name <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;, age &#061; &#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","protected":false},"excerpt":{"rendered":"<p>1. \u4e3a\u4ec0\u4e48\u9700\u8981\u6784\u9020\u65b9\u6cd5\u4ee3\u7801\u5197\u4f59\u4e0e\u9057\u6f0f\u98ce\u9669&#xff1a;\u521b\u5efa\u5bf9\u8c61\u540e&#xff0c;\u5982\u679c\u4ec5\u4f7f\u7528 setter \u65b9\u6cd5\u9010\u4e00\u521d\u59cb\u5316\u5b57\u6bb5&#xff0c;\u9700\u8981\u7f16\u5199\u591a\u884c\u4ee3\u7801&#xff0c;\u4e14\u5bb9\u6613\u9057\u6f0f\u8c03\u7528\u67d0\u4e9b 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