{"id":69,"date":"2021-08-24T16:59:19","date_gmt":"2021-08-24T08:59:19","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/javav2\/?p=69"},"modified":"2021-08-27T10:17:20","modified_gmt":"2021-08-27T02:17:20","slug":"java%e4%b9%8b%e5%86%85%e9%83%a8%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/javav2\/post-69.html","title":{"rendered":"java\u4e4b\u5185\u90e8\u7c7b"},"content":{"rendered":"\n<p>\u5185\u90e8\u7c7b\uff0c\u662f\u6307\u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u5efa\u7acb\u7684\u7c7b<\/p>\n\n\n\n<p>\u5185\u90e8\u7c7b\u5206\u4e3a\uff1a\u6210\u5458\u5185\u90e8\u7c7b\uff0c\u5c40\u90e8\u5185\u90e8\u7c7b\uff0c\u533f\u540d\u5185\u90e8\u7c7b\uff08\u4e5f\u53ef\u770b\u4f5c\u5c40\u90e8\u5185\u90e8\u7c7b\u7684\u4e00\u79cd\uff09<\/p>\n\n\n\n<h2>\u6210\u5458\u5185\u90e8\u7c7b<\/h2>\n\n\n\n<p>\u6210\u5458\u5185\u90e8\u7c7b\uff0c\u5c31\u662f\u5728\u7c7b\u7684\u6210\u5458\u4f4d\u7f6e\u4e0a\u5b9a\u4e49\u7684\u7c7b<\/p>\n\n\n\n<h5>1.\u6210\u5458\u5185\u90e8\u7c7b\u7684\u5b9a\u4e49<\/h5>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4fee\u9970\u7b26 class \u5916\u90e8\u7c7b\u540d\u79f0{\n  \u4fee\u9970\u7b26 class \u5185\u90e8\u7c7b\u540d\u79f0{\n      \/\/\u6210\u5458\u5185\u90e8\u7c7b\u7c7b\u4f53;\n  }\n  \/\/\u5916\u90e8\u7c7b\u7c7b\u4f53;\n}<\/code><\/pre>\n\n\n\n<p>\uff08\u6ce8\uff1a\u53ef\u4ee5static\u4fee\u9970\uff0c\u6b64\u65f6\u4e3a\u9759\u6001\u6210\u5458\u5185\u90e8\u7c7b\uff0c\u8fd9\u91cc\u4e0d\u8bb2\uff09<\/p>\n\n\n\n<h5>2.\u4e92\u76f8\u8bbf\u95ee<\/h5>\n\n\n\n<p>\u6210\u5458\u5185\u90e8\u7c7b\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5916\u90e8\u7c7b\u7684\u8d44\u6e90<\/p>\n\n\n\n<p>\u5916\u90e8\u7c7b\u4f7f\u7528\u8bbf\u95ee\u6210\u5458\u5185\u90e8\u7c7b\u7684\u65b9\u6cd5\uff0c\u9700\u8981\u901a\u8fc7 new \u5185\u90e8\u7c7b\u5bf9\u8c61<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u5728\u6b64\u5916\u90e8\u7c7b\u4e2d\n\u5185\u90e8\u7c7b \u7c7b\u540d = new \u5185\u90e8\u7c7b(\u53c2\u6570\u5217\u8868);\n\n\/\/\u5728\u5176\u4ed6\u5916\u90e8\u7c7b\u4e2d\n\u5916\u90e8\u7c7b.\u5185\u90e8\u7c7b \u7c7b\u540d = new \u5916\u90e8\u7c7b.new \u5185\u90e8\u7c7b();<\/code><\/pre>\n\n\n\n<h5>3.\u540c\u540d\u5c5e\u6027\u51b2\u7a81\u7684\u89e3\u51b3<\/h5>\n\n\n\n<pre class=\"wp-block-code\"><code>\u53d8\u91cf\u540d;  \/\/\u5185\u90e8\u7c7b\u5c40\u90e8\u53d8\u91cf\nthis.\u53d8\u91cf\u540d;  \/\/\u5185\u90e8\u7c7b\u6210\u5458\u53d8\u91cf\n\u5916\u90e8\u7c7b.\u53d8\u91cf\u540d;  \/\/\u5916\u90e8\u7c7b\u6210\u5458\u53d8\u91cf<\/code><\/pre>\n\n\n\n<h2>\u5c40\u90e8\u5185\u90e8\u7c7b<\/h2>\n\n\n\n<p>\u5c40\u90e8\u5185\u90e8\u7c7b\u662f\u5728\u65b9\u6cd5\u5185\u90e8\u7684\u4f4d\u7f6e<\/p>\n\n\n\n<h5>1.\u5c40\u90e8\u5185\u90e8\u7c7b\u5b9a\u4e49<\/h5>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4fee\u9970\u7b26 class \u5916\u90e8\u7c7b\u540d\u79f0{\n  \u4fee\u9970\u7b26 \u8fd4\u56de\u503c\u7c7b\u578b \u5916\u90e8\u7c7b\u65b9\u6cd5(\u53c2\u6570\u5217\u8868){\n    \u4fee\u9970\u7b26 class \u5c40\u90e8\u5185\u90e8\u7c7b\u540d\u79f0{\n      \/\/ \u5c40\u90e8\u5185\u90e8\u7c7b\n    }\n  }\n}<\/code><\/pre>\n\n\n\n<h5>2.\u8bbf\u95ee<\/h5>\n\n\n\n<p>\u5c40\u90e8\u5185\u90e8\u7c7b\u53ef\u4ee5\u76f4\u63a5\u5916\u90e8\u7c7b<\/p>\n\n\n\n<p>\u5916\u90e8\u7c7b\u7684\u672c\u65b9\u6cd5\u4f53\u5185\uff0c\u53ef\u4ee5\u901a\u8fc7 new \u5185\u90e8\u7c7b\u5bf9\u8c61<\/p>\n\n\n\n<h5>3.\u53d8\u91cf\u7684 final \u95ee\u9898<\/h5>\n\n\n\n<p>\u5bf9\u4e8e\u5c40\u90e8\u5185\u90e8\u7c7b\uff0c\u53ea\u80fd\u8bbf\u95ee\u5230 \u6709\u6548 final (jdk8)\u7684\u5c40\u90e8\u53d8\u91cf\u3002\u5bf9\u4e8e\u66f4\u65e9\u7248\u672c\u7684jdk\uff0c\u53ea\u80fd\u8bbf\u95ee\u5230 final \u5b9a\u4e49\u7684\u5c40\u90e8\u53d8\u91cf\u3002<\/p>\n\n\n\n<h2>\u533f\u540d\u5185\u90e8\u7c7b<\/h2>\n\n\n\n<p>\u533f\u540d\u5185\u90e8\u7c7b\u5c5e\u4e8e\u5c40\u90e8\u5185\u90e8\u7c7b\u7684\u4e00\u79cd<\/p>\n\n\n\n<p>\u533f\u540d\u5185\u90e8\u7c7b\u5e76\u4e0d\u662f\u6307\u533f\u540d\u5bf9\u8c61\uff0c\u800c\u662f\u6307\u7701\u7565 extends, implements \u7684\u7c7b<\/p>\n\n\n\n<p>(\u533f\u540d\u5185\u90e8\u7c7b\uff0c\u662f\u6307\u6ca1\u6709\u7c7b\u7684\u540d\u5b57\uff0c\u5f97\u5230\u7684\u4ea7\u7269\u662f\u5bf9\u8c61\uff0c\u5bf9\u8c61\u53ef\u4ee5\u6709\u540d\u5b57\uff09<\/p>\n\n\n\n<p>\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u63a5\u53e3\u7c7b\n\u63a5\u53e3\u7c7b\u540d\u79f0 \u53d8\u91cf\u540d = new \u63a5\u53e3\u7c7b\u540d\u79f0(\u53c2\u6570\u5217\u8868){\n  \/\/\u8986\u76d6\u672a\u5b9e\u73b0\u65b9\u6cd5;\n}\n\/\/\u5b50\u7c7b\n\u7236\u7c7b\u540d\u79f0 \u53d8\u91cf\u540d = new \u7236\u7c7b\u540d\u79f0(\u53c2\u6570\u5217\u8868){\n  \/\/\u7c7b\u4f53;\n}<\/code><\/pre>\n\n\n\n<h5>\u7c7b\u4f53\u8bbf\u95ee\u4fee\u9970\u7b26<\/h5>\n\n\n\n<p>1.\u5916\u90e8\u7c7b\uff1a public \/ (default)<\/p>\n\n\n\n<p>2.\u6210\u5458\u5185\u90e8\u7c7b\uff1apublic \/ protected \/ (default) \/ private<\/p>\n\n\n\n<p>3.\u5c40\u90e8\u5185\u90e8\u7c7b\uff08\u5305\u62ec\u533f\u540d\u5185\u90e8\u7c7b\uff09\uff1a\u4ec0\u4e48\u90fd\u4e0d\u80fd\u5199<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5185\u90e8\u7c7b\uff0c\u662f\u6307\u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u5efa\u7acb\u7684\u7c7b \u5185\u90e8\u7c7b\u5206\u4e3a\uff1a\u6210\u5458\u5185\u90e8\u7c7b\uff0c\u5c40\u90e8\u5185\u90e8\u7c7b\uff0c\u533f\u540d\u5185\u90e8\u7c7b\uff08\u4e5f\u53ef\u770b\u4f5c\u5c40\u90e8\u5185\u90e8\u7c7b\u7684\u4e00\u79cd\uff09 &hellip; <a href=\"https:\/\/www.52dixiaowo.com\/javav2\/post-69.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">java\u4e4b\u5185\u90e8\u7c7b<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts\/69"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/comments?post=69"}],"version-history":[{"count":0,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts\/69\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/media?parent=69"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/categories?post=69"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/tags?post=69"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}