{"id":16239,"date":"2023-11-07T08:54:44","date_gmt":"2023-11-07T00:54:44","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=16239"},"modified":"2023-11-07T08:54:44","modified_gmt":"2023-11-07T00:54:44","slug":"%e4%bd%a0%e7%9c%9f%e7%9a%84%e4%ba%86%e8%a7%a3java%e4%b8%ad%e7%9a%84this%e5%85%b3%e9%94%ae%e5%ad%97%e5%90%97%ef%bc%9f%e9%80%9a%e8%bf%87%e5%ae%9e%e4%be%8b%e4%b8%ba%e4%bd%a0%e8%af%a6%e7%bb%86%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2023\/11\/07\/16239\/","title":{"rendered":"\u4f60\u771f\u7684\u4e86\u89e3Java\u4e2d\u7684this\u5173\u952e\u5b57\u5417\uff1f\u901a\u8fc7\u5b9e\u4f8b\u4e3a\u4f60\u8be6\u7ec6\u4ecb\u7ecd"},"content":{"rendered":"<div class=\"article-desc\">This\u5173\u952e\u5b57\u662fJava\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u5b83\u8868\u793a\u5f53\u524d\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u901a\u8fc7\u5408\u7406\u5730\u4f7f\u7528This\u5173\u952e\u5b57\uff0c\u53ef\u4ee5\u8bbf\u95ee\u5f53\u524d\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u3001\u6210\u5458\u65b9\u6cd5\u548c\u6784\u9020\u65b9\u6cd5\uff0c\u5b9e\u73b0\u94fe\u5f0f\u8c03\u7528\u3001\u6784\u9020\u65b9\u6cd5\u94fe\u548c\u5355\u4f8b\u6a21\u5f0f\u7b49\u529f\u80fd\u3002<\/div>\n<div id=\"postspictures\" class=\"article-content\">\n<div id=\"container\" class=\"container am-engine\" data-v-0719ea8d=\"\" data-element=\"root\">\n<p><img data-dominant-color=\"327cc1\" data-has-transparency=\"false\" style=\"--dominant-color: #327cc1;\" loading=\"lazy\" decoding=\"async\" class=\"not-transparent alignnone size-full wp-image-16240\" src=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2023\/11\/c6f4b3805b3c1cc208d77825758faa2e945cc9.png\" width=\"1034\" height=\"585\" srcset=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2023\/11\/c6f4b3805b3c1cc208d77825758faa2e945cc9.png 1034w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2023\/11\/c6f4b3805b3c1cc208d77825758faa2e945cc9-300x170.png 300w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2023\/11\/c6f4b3805b3c1cc208d77825758faa2e945cc9-1024x579.png 1024w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2023\/11\/c6f4b3805b3c1cc208d77825758faa2e945cc9-150x85.png 150w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2023\/11\/c6f4b3805b3c1cc208d77825758faa2e945cc9-768x435.png 768w\" sizes=\"auto, (max-width: 1034px) 100vw, 1034px\" \/><\/p>\n<p>this\u5173\u952e\u5b57\u5728Java\u4e2d\u662f\u4e00\u4e2a\u975e\u5e38\u7279\u6b8a\u7684\u5173\u952e\u5b57\uff0c\u5b83\u8868\u793a\u5f53\u524d\u5bf9\u8c61\u7684\u5f15\u7528\u3002this\u5173\u952e\u5b57\u53ef\u4ee5\u7528\u6765\u8bbf\u95ee\u5f53\u524d\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u3001\u6210\u5458\u65b9\u6cd5\u548c\u6784\u9020\u65b9\u6cd5\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u6f14\u793a\u4e86this\u5173\u952e\u5b57\u7684\u7528\u6cd5\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_0\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span>\r\n\r\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>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">=<\/span> name<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4f7f\u7528this\u5173\u952e\u5b57\u5f15\u7528\u6210\u5458\u53d8\u91cfname<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">=<\/span> age<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4f7f\u7528this\u5173\u952e\u5b57\u5f15\u7528\u6210\u5458\u53d8\u91cfage<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">sayHello<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\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\">\"Hello, my name is \"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">+<\/span> <span class=\"token string\">\", and I am \"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">+<\/span> <span class=\"token string\">\" years old.\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token comment\">\/\/ \u4f7f\u7528this\u5173\u952e\u5b57\u5f15\u7528\u6210\u5458\u53d8\u91cfname\u548cage<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<ul id=\"code_id_0\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cthis\u5173\u952e\u5b57\u7528\u6765\u5f15\u7528\u5f53\u524d\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cfname\u548cage\u3002\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\uff0cthis\u5173\u952e\u5b57\u7528\u6765\u533a\u5206\u6210\u5458\u53d8\u91cf\u548c\u53c2\u6570\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u540d\u79f0\u76f8\u540c\u3002\u5728sayHello\u65b9\u6cd5\u4e2d\uff0cthis\u5173\u952e\u5b57\u53ef\u4ee5\u7701\u7565\uff0c\u4f46\u662f\u52a0\u4e0a\u5b83\u53ef\u4ee5\u66f4\u52a0\u6e05\u6670\u5730\u8868\u660e\u6211\u4eec\u5728\u8bbf\u95ee\u5f53\u524d\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u3002<\/p>\n<p>\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n<ul data-id=\"u738a58b-GAV7TN3i\">\n<li data-id=\"ld70c578-MPCLBDQh\">this\u5173\u952e\u5b57\u4e0d\u80fd\u5728\u9759\u6001\u65b9\u6cd5\u4e2d\u4f7f\u7528\uff0c\u56e0\u4e3a\u9759\u6001\u65b9\u6cd5\u4e0d\u5c5e\u4e8e\u4efb\u4f55\u5bf9\u8c61\uff0c\u800c\u662f\u5c5e\u4e8e\u7c7b\u672c\u8eab\u3002<\/li>\n<li data-id=\"ld70c578-q05k7f51\">this\u5173\u952e\u5b57\u7684\u503c\u4e0d\u80fd\u88ab\u8d4b\u503c\u7ed9\u53e6\u4e00\u4e2a\u53d8\u91cf\uff0c\u56e0\u4e3a\u5b83\u53ea\u662f\u4e00\u4e2a\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u4e00\u4e2a\u5bf9\u8c61\u3002<\/li>\n<li data-id=\"ld70c578-WCJD2syN\">\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\uff0c\u5982\u679c\u53c2\u6570\u7684\u540d\u79f0\u548c\u6210\u5458\u53d8\u91cf\u7684\u540d\u79f0\u76f8\u540c\uff0c\u90a3\u4e48\u5fc5\u987b\u4f7f\u7528this\u5173\u952e\u5b57\u6765\u5f15\u7528\u6210\u5458\u53d8\u91cf\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/li>\n<li data-id=\"ld70c578-rErBc0Z0\">\u5728\u65b9\u6cd5\u4e2d\uff0c\u5982\u679c\u53c2\u6570\u7684\u540d\u79f0\u548c\u6210\u5458\u53d8\u91cf\u7684\u540d\u79f0\u76f8\u540c\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528this\u5173\u952e\u5b57\u6765\u5f15\u7528\u6210\u5458\u53d8\u91cf\uff0c\u4e5f\u53ef\u4ee5\u7701\u7565this\u5173\u952e\u5b57\uff0c\u76f4\u63a5\u4f7f\u7528\u53c2\u6570\u540d\u79f0\u3002\u4f46\u662f\u4e3a\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u6700\u597d\u4f7f\u7528this\u5173\u952e\u5b57\u6765\u660e\u786e\u8868\u660e\u6211\u4eec\u5728\u8bbf\u95ee\u6210\u5458\u53d8\u91cf\u3002<\/li>\n<li data-id=\"ld70c578-IBEP3pCG\">this()\u53ef\u4ee5\u7528\u6765\u8c03\u7528\u540c\u4e00\u4e2a\u7c7b\u4e2d\u7684\u53e6\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u4f46\u662f\u5fc5\u987b\u653e\u5728\u6784\u9020\u65b9\u6cd5\u7684\u7b2c\u4e00\u884c\u3002\u8fd9\u6837\u505a\u53ef\u4ee5\u907f\u514d\u91cd\u590d\u7684\u4ee3\u7801\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u6613\u61c2\u3002<\/li>\n<li data-id=\"ld70c578-oMKTany3\">this\u5173\u952e\u5b57\u7684\u4f7f\u7528\u5e94\u8be5\u5c3d\u53ef\u80fd\u5730\u6e05\u6670\u660e\u4e86\uff0c\u4e0d\u8981\u5728\u4ee3\u7801\u4e2d\u6ee5\u7528\u5b83\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528this()\u8c03\u7528\u53e6\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\u7684\u4f8b\u5b50\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_1\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> address<span class=\"token punctuation\">;<\/span>\r\n\r\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>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">=<\/span> name<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">=<\/span> age<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\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> address<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">this<\/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\u53e6\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u521d\u59cb\u5316name\u548cage\u6210\u5458\u53d8\u91cf<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>address <span class=\"token operator\">=<\/span> address<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u521d\u59cb\u5316address\u6210\u5458\u53d8\u91cf<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">sayHello<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\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\">\"Hello, my name is \"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">+<\/span> <span class=\"token string\">\", and I am \"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">+<\/span> <span class=\"token string\">\" years old.\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>address <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\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\">\"My address is \"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>address<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<ul id=\"code_id_1\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<li>16.<\/li>\n<li>17.<\/li>\n<li>18.<\/li>\n<li>19.<\/li>\n<li>20.<\/li>\n<li>21.<\/li>\n<li>22.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u7b2c\u4e8c\u4e2a\u6784\u9020\u65b9\u6cd5\u8c03\u7528\u4e86\u7b2c\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u901a\u8fc7this()\u6765\u521d\u59cb\u5316name\u548cage\u6210\u5458\u53d8\u91cf\u3002\u7136\u540e\u5b83\u518d\u521d\u59cb\u5316address\u6210\u5458\u53d8\u91cf\u3002\u8fd9\u6837\u505a\u53ef\u4ee5\u907f\u514d\u91cd\u590d\u7684\u4ee3\u7801\uff0c\u4f7f\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u6613\u61c2\u3002\u5728sayHello\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528this\u5173\u952e\u5b57\u6765\u8bbf\u95ee\u6210\u5458\u53d8\u91cf\uff0c\u4ee5\u533a\u5206\u5b83\u4eec\u548c\u5c40\u90e8\u53d8\u91cf\u7684\u540d\u79f0\u3002<br \/>\n\u9664\u4e86\u4e0a\u8ff0\u7684\u6ce8\u610f\u4e8b\u9879\uff0c\u8fd8\u6709\u4e00\u4e9b\u5173\u4e8ethis\u5173\u952e\u5b57\u7684\u7ec6\u8282\u9700\u8981\u4e86\u89e3\u3002<\/p>\n<p>this\u5173\u952e\u5b57\u53ef\u4ee5\u7528\u6765\u5b9e\u73b0\u94fe\u5f0f\u8c03\u7528\u3002\u94fe\u5f0f\u8c03\u7528\u662f\u4e00\u79cd\u7f16\u7a0b\u98ce\u683c\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u5728\u540c\u4e00\u4e2a\u5bf9\u8c61\u4e0a\u8fde\u7eed\u8c03\u7528\u591a\u4e2a\u65b9\u6cd5\uff0c\u4ece\u800c\u4f7f\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u548c\u6613\u4e8e\u9605\u8bfb\u3002\u901a\u8fc7\u5728\u65b9\u6cd5\u8fd4\u56dethis\u5173\u952e\u5b57\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u94fe\u5f0f\u8c03\u7528\u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_2\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Calculator<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> result<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Calculator<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> number<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>result <span class=\"token operator\">+=<\/span> number<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Calculator<\/span> <span class=\"token function\">subtract<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> number<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>result <span class=\"token operator\">-=<\/span> number<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">getResult<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>result<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token comment\">\/\/ \u94fe\u5f0f\u8c03\u7528\u793a\u4f8b<\/span>\r\n<span class=\"token class-name\">Calculator<\/span> calculator <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Calculator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\ncalculator<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">subtract<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">int<\/span> result <span class=\"token operator\">=<\/span> calculator<span class=\"token punctuation\">.<\/span><span class=\"token function\">getResult<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ result\u7684\u503c\u4e3a2<\/span><\/code><\/pre>\n<ul id=\"code_id_2\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<li>16.<\/li>\n<li>17.<\/li>\n<li>18.<\/li>\n<li>19.<\/li>\n<li>20.<\/li>\n<li>21.<\/li>\n<li>22.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cadd\u548csubtract\u65b9\u6cd5\u90fd\u8fd4\u56dethis\u5173\u952e\u5b57\uff0c\u4ece\u800c\u5b9e\u73b0\u94fe\u5f0f\u8c03\u7528\u3002\u8fd9\u79cd\u7f16\u7a0b\u98ce\u683c\u5728\u4e00\u4e9b\u6846\u67b6\u548c\u5e93\u4e2d\u975e\u5e38\u5e38\u89c1\uff0c\u6bd4\u5982jQuery\u548cJava\u7684Builder\u6a21\u5f0f\u3002<\/p>\n<p>this\u5173\u952e\u5b57\u5728\u5185\u90e8\u7c7b\u548c\u533f\u540d\u5185\u90e8\u7c7b\u4e2d\u5177\u6709\u7279\u6b8a\u7684\u542b\u4e49\u3002\u5728\u5185\u90e8\u7c7b\u4e2d\uff0cthis\u5173\u952e\u5b57\u5f15\u7528\u7684\u662f\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\uff0c\u800c\u4e0d\u662f\u5185\u90e8\u7c7b\u672c\u8eab\u3002\u5982\u679c\u8981\u5728\u5185\u90e8\u7c7b\u4e2d\u5f15\u7528\u5185\u90e8\u7c7b\u672c\u8eab\u7684\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u90e8\u7c7b\u540d.this\u7684\u5f62\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_3\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OuterClass<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> value<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">InnerClass<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> value<span class=\"token punctuation\">;<\/span>\r\n\r\n        <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> value<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>value <span class=\"token operator\">=<\/span> value<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5f15\u7528\u5185\u90e8\u7c7b\u672c\u8eab\u7684\u5b9e\u4f8b\u53d8\u91cf<\/span>\r\n            <span class=\"token class-name\">OuterClass<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>value <span class=\"token operator\">=<\/span> value<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5f15\u7528\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\u53d8\u91cf<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<ul id=\"code_id_3\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cthis.value\u5f15\u7528\u7684\u662f\u5185\u90e8\u7c7b\u672c\u8eab\u7684\u5b9e\u4f8b\u53d8\u91cf\uff0c\u800cOuterClass.this.value\u5f15\u7528\u7684\u662f\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\u53d8\u91cf\u3002<\/p>\n<p>\u5728Java 8\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528this::\u8bed\u6cd5\u6765\u5f15\u7528\u5f53\u524d\u5b9e\u4f8b\u7684\u65b9\u6cd5\u3002\u8fd9\u79cd\u8bed\u6cd5\u5728Lambda\u8868\u8fbe\u5f0f\u548c\u65b9\u6cd5\u5f15\u7528\u4e2d\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_4\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MyClass<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">MyClass<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">=<\/span> name<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">printName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\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 keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Consumer<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">MyClass<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">getPrintNameMethodReference<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token operator\">::<\/span><span class=\"token function\">printName<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5f15\u7528\u5f53\u524d\u5b9e\u4f8b\u7684printName\u65b9\u6cd5<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<ul id=\"code_id_4\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cthis::printName\u8bed\u6cd5\u7528\u6765\u5f15\u7528\u5f53\u524d\u5b9e\u4f8b\u7684printName\u65b9\u6cd5\u3002\u8fd9\u79cd\u65b9\u6cd5\u5f15\u7528\u53ef\u4ee5\u5728\u5176\u4ed6\u65b9\u6cd5\u4e2d\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u6216\u8005\u5728Lambda\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_5\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token class-name\">MyClass<\/span> myClass <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">MyClass<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"John\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token class-name\">Consumer<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">MyClass<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> printNameMethodReference <span class=\"token operator\">=<\/span> myClass<span class=\"token punctuation\">.<\/span><span class=\"token function\">getPrintNameMethodReference<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\nprintNameMethodReference<span class=\"token punctuation\">.<\/span><span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>myClass<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa \"John\"<\/span><\/code><\/pre>\n<ul id=\"code_id_5\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u9664\u4e86\u4e0a\u8ff0\u7684\u5185\u5bb9\uff0c\u8fd8\u6709\u4e00\u4e9b\u5173\u4e8ethis\u5173\u952e\u5b57\u7684\u7279\u6b8a\u7528\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n<p>\u5728Java\u4e2d\uff0cthis\u5173\u952e\u5b57\u53ef\u4ee5\u7528\u6765\u8c03\u7528\u540c\u4e00\u7c7b\u4e2d\u7684\u5176\u4ed6\u6784\u9020\u65b9\u6cd5\u3002\u8fd9\u79cd\u7528\u6cd5\u88ab\u79f0\u4e3a\u6784\u9020\u65b9\u6cd5\u94fe\u6216\u8005\u6784\u9020\u65b9\u6cd5\u59d4\u6258\u3002\u901a\u8fc7\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\u8c03\u7528\u540c\u4e00\u4e2a\u7c7b\u4e2d\u7684\u53e6\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u53ef\u4ee5\u907f\u514d\u4ee3\u7801\u91cd\u590d\uff0c\u5e76\u4f7f\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u6613\u61c2\u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_6\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Person<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> address<span class=\"token punctuation\">;<\/span>\r\n\r\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>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">=<\/span> name<span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>age <span class=\"token operator\">=<\/span> age<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\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> address<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">this<\/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\u53e6\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u521d\u59cb\u5316name\u548cage\u6210\u5458\u53d8\u91cf<\/span>\r\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>address <span class=\"token operator\">=<\/span> address<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u521d\u59cb\u5316address\u6210\u5458\u53d8\u91cf<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<ul id=\"code_id_6\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u7b2c\u4e8c\u4e2a\u6784\u9020\u65b9\u6cd5\u901a\u8fc7this(name, age)\u8c03\u7528\u4e86\u7b2c\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u4ece\u800c\u521d\u59cb\u5316\u4e86name\u548cage\u6210\u5458\u53d8\u91cf\u3002\u7136\u540e\u5b83\u518d\u521d\u59cb\u5316address\u6210\u5458\u53d8\u91cf\u3002<\/p>\n<p>\u5728Java\u4e2d\uff0c\u5982\u679c\u4e00\u4e2a\u7c7b\u4e2d\u6709\u591a\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u90a3\u4e48\u81f3\u5c11\u6709\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\u5fc5\u987b\u663e\u5f0f\u5730\u8c03\u7528\u540c\u4e00\u4e2a\u7c7b\u4e2d\u7684\u53e6\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u6216\u8005\u901a\u8fc7\u9ed8\u8ba4\u6784\u9020\u65b9\u6cd5\u6765\u521d\u59cb\u5316\u6210\u5458\u53d8\u91cf\u3002\u5426\u5219\uff0c\u7f16\u8bd1\u5668\u4f1a\u62a5\u9519\u3002\u8fd9\u662f\u56e0\u4e3aJava\u7684\u6784\u9020\u65b9\u6cd5\u662f\u4e0d\u80fd\u88ab\u7ee7\u627f\u7684\uff0c\u6240\u4ee5\u5b50\u7c7b\u5fc5\u987b\u901a\u8fc7\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u6765\u521d\u59cb\u5316\u7236\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u3002<\/p>\n<p>\u5728Java\u4e2d\uff0cthis\u5173\u952e\u5b57\u4e0d\u80fd\u51fa\u73b0\u5728\u9759\u6001\u4e0a\u4e0b\u6587\u4e2d\uff0c\u5305\u62ec\u9759\u6001\u65b9\u6cd5\u548c\u9759\u6001\u521d\u59cb\u5316\u5757\u3002\u8fd9\u662f\u56e0\u4e3a\u9759\u6001\u65b9\u6cd5\u662f\u5c5e\u4e8e\u7c7b\u7684\uff0c\u800c\u4e0d\u662f\u5c5e\u4e8e\u5bf9\u8c61\u7684\uff0c\u6240\u4ee5\u5b83\u4eec\u4e0d\u80fd\u8bbf\u95ee\u5bf9\u8c61\u7684\u5b9e\u4f8b\u53d8\u91cf\u548c\u5b9e\u4f8b\u65b9\u6cd5\u3002\u540c\u6837\u5730\uff0c\u9759\u6001\u521d\u59cb\u5316\u5757\u4e5f\u662f\u5728\u7c7b\u52a0\u8f7d\u65f6\u6267\u884c\u7684\uff0c\u800c\u4e0d\u662f\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u6267\u884c\u7684\uff0c\u6240\u4ee5\u5b83\u4eec\u4e5f\u4e0d\u80fd\u8bbf\u95ee\u5bf9\u8c61\u7684\u5b9e\u4f8b\u53d8\u91cf\u548c\u5b9e\u4f8b\u65b9\u6cd5\u3002<\/p>\n<p>\u5728Java\u4e2d\uff0cthis\u5173\u952e\u5b57\u53ef\u4ee5\u7528\u6765\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u3002\u5355\u4f8b\u6a21\u5f0f\u662f\u4e00\u79cd\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u8981\u6c42\u4e00\u4e2a\u7c7b\u53ea\u80fd\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u3002\u901a\u8fc7\u5728\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4e2d\u4f7f\u7528this\u5173\u952e\u5b57\u6765\u5f15\u7528\u5f53\u524d\u5bf9\u8c61\uff0c\u5e76\u5728\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\u4e2d\u8fd4\u56de\u8be5\u5bf9\u8c61\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_7\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-java\" tabindex=\"0\"><code class=\"language-java\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Singleton<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">Singleton<\/span> instance<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">Singleton<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>instance <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">RuntimeException<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Use getInstance() method to get the single instance of this class.\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        instance <span class=\"token operator\">=<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">Singleton<\/span> <span class=\"token function\">getInstance<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>instance <span class=\"token operator\">==<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            instance <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Singleton<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token keyword\">return<\/span> instance<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<ul id=\"code_id_7\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<li>16.<\/li>\n<li>17.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cSingleton\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4f7f\u7528this\u5173\u952e\u5b57\u6765\u5f15\u7528\u5f53\u524d\u5bf9\u8c61\uff0c\u5e76\u5c06\u8be5\u5bf9\u8c61\u8d4b\u503c\u7ed9\u9759\u6001\u53d8\u91cfinstance\u3002\u7136\u540e\uff0c\u9759\u6001\u65b9\u6cd5getInstance()\u8fd4\u56de\u8be5\u9759\u6001\u53d8\u91cf\u3002\u8fd9\u6837\uff0c\u6bcf\u6b21\u8c03\u7528getInstance()\u65b9\u6cd5\u65f6\u90fd\u4f1a\u8fd4\u56de\u540c\u4e00\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n<p>this\u5173\u952e\u5b57\u662fJava\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u5b83\u8868\u793a\u5f53\u524d\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u901a\u8fc7\u5408\u7406\u5730\u4f7f\u7528this\u5173\u952e\u5b57\uff0c\u53ef\u4ee5\u8bbf\u95ee\u5f53\u524d\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u3001\u6210\u5458\u65b9\u6cd5\u548c\u6784\u9020\u65b9\u6cd5\uff0c\u5b9e\u73b0\u94fe\u5f0f\u8c03\u7528\u3001\u6784\u9020\u65b9\u6cd5\u94fe\u548c\u5355\u4f8b\u6a21\u5f0f\u7b49\u529f\u80fd\u3002\u4f46\u662f\uff0c\u5728\u4f7f\u7528this\u5173\u952e\u5b57\u65f6\u9700\u8981\u6ce8\u610f\u4e00\u4e9b\u7ec6\u8282\u548c\u9650\u5236\uff0c\u6bd4\u5982\u4e0d\u80fd\u5728\u9759\u6001\u4e0a\u4e0b\u6587\u4e2d\u4f7f\u7528\u3001\u4e0d\u80fd\u8d4b\u503c\u7ed9\u53e6\u4e00\u4e2a\u53d8\u91cf\u7b49\u3002<\/p>\n<\/div>\n<\/div>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_16239\" class=\"pvc_stats total_only  \" data-element-id=\"16239\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" version=\"1.0\" viewBox=\"0 0 502 315\" preserveAspectRatio=\"xMidYMid meet\"><g transform=\"translate(0,332) scale(0.1,-0.1)\" fill=\"\" stroke=\"none\"><path d=\"M2394 3279 l-29 -30 -3 -207 c-2 -182 0 -211 15 -242 39 -76 157 -76 196 0 15 31 17 60 15 243 l-3 209 -33 29 c-26 23 -41 29 -80 29 -41 0 -53 -5 -78 -31z\"\/><path d=\"M3085 3251 c-45 -19 -58 -50 -96 -229 -47 -217 -49 -260 -13 -295 52 -53 146 -42 177 20 16 31 87 366 87 410 0 70 -86 122 -155 94z\"\/><path d=\"M1751 3234 c-13 -9 -29 -31 -37 -50 -12 -29 -10 -49 21 -204 19 -94 39 -189 45 -210 14 -50 54 -80 110 -80 34 0 48 6 76 34 21 21 34 44 34 59 0 14 -18 113 -40 219 -37 178 -43 195 -70 221 -36 32 -101 37 -139 11z\"\/><path d=\"M1163 3073 c-36 -7 -73 -59 -73 -102 0 -56 133 -378 171 -413 34 -32 83 -37 129 -13 70 36 67 87 -16 290 -86 209 -89 214 -129 231 -35 14 -42 15 -82 7z\"\/><path d=\"M3689 3066 c-15 -9 -33 -30 -42 -48 -48 -103 -147 -355 -147 -375 0 -98 131 -148 192 -74 13 15 57 108 97 206 80 196 84 226 37 273 -30 30 -99 39 -137 18z\"\/><path d=\"M583 2784 c-38 -19 -67 -74 -58 -113 9 -42 211 -354 242 -373 16 -10 45 -18 66 -18 51 0 107 52 107 100 0 39 -1 41 -124 234 -80 126 -108 162 -133 173 -41 17 -61 16 -100 -3z\"\/><path d=\"M4250 2784 c-14 -9 -74 -91 -133 -183 -95 -150 -107 -173 -107 -213 0 -55 33 -94 87 -104 67 -13 90 8 211 198 130 202 137 225 78 284 -27 27 -42 34 -72 34 -22 0 -50 -8 -64 -16z\"\/><path d=\"M2275 2693 c-553 -48 -1095 -270 -1585 -649 -135 -104 -459 -423 -483 -476 -23 -49 -22 -139 2 -186 73 -142 361 -457 571 -626 285 -228 642 -407 990 -497 242 -63 336 -73 660 -74 310 0 370 5 595 52 535 111 1045 392 1455 803 122 121 250 273 275 326 19 41 19 137 0 174 -41 79 -309 363 -465 492 -447 370 -946 591 -1479 653 -113 14 -422 18 -536 8z m395 -428 c171 -34 330 -124 456 -258 112 -119 167 -219 211 -378 27 -96 24 -300 -5 -401 -72 -255 -236 -447 -474 -557 -132 -62 -201 -76 -368 -76 -167 0 -236 14 -368 76 -213 98 -373 271 -451 485 -162 444 86 934 547 1084 153 49 292 57 452 25z m909 -232 c222 -123 408 -262 593 -441 76 -74 138 -139 138 -144 0 -16 -233 -242 -330 -319 -155 -123 -309 -223 -461 -299 l-81 -41 32 46 c18 26 49 83 70 128 143 306 141 649 -6 957 -25 52 -61 116 -79 142 l-34 47 45 -20 c26 -10 76 -36 113 -56z m-2057 25 c-40 -58 -105 -190 -130 -263 -110 -324 -59 -707 132 -981 25 -35 42 -64 37 -64 -19 0 -241 119 -326 174 -188 122 -406 314 -532 468 l-58 71 108 103 c185 178 428 349 672 473 66 33 121 60 123 61 2 0 -10 -19 -26 -42z\"\/><path d=\"M2375 1950 c-198 -44 -350 -190 -395 -379 -18 -76 -8 -221 19 -290 114 -284 457 -406 731 -260 98 52 188 154 231 260 27 69 37 214 19 290 -38 163 -166 304 -326 360 -67 23 -215 33 -279 19z\"\/><\/g><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" 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