{"id":866,"date":"2022-10-12T22:52:17","date_gmt":"2022-10-12T14:52:17","guid":{"rendered":"https:\/\/qaqaq.top\/?p=866"},"modified":"2022-12-19T20:09:18","modified_gmt":"2022-12-19T12:09:18","slug":"%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e4%b8%8b-%e5%a4%8d%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=866","title":{"rendered":"\u9762\u5411\u5bf9\u8c61(\u4e0b)-\u590d\u4e60"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>1. static \u4fee\u9970\u7684\u5c5e\u6027\uff0c\u76f8\u8f83\u4e8e\u5b9e\u4f8b\u53d8\u91cf\uff0c\u6709\u54ea\u4e9b\u7279\u522b\u4e4b\u5904(&gt;=3\u70b9)\n\u968f\u7740\u7c7b\u7684\u52a0\u8f7d\u800c\u52a0\u8f7d\uff1a\u65e9\u4e8e\u5bf9\u8c61\u7684\u521b\u5efa\uff1b\u53ea\u8981\u6743\u9650\u5141\u8bb8\uff0c\u53ef\u4ee5\u901a\u8fc7\"\u5bf9\u8c61.static\u5c5e\u6027\"\u7684\u65b9\u5f0f\u8fdb\u884c\u8c03\u7528\uff1b\u5b58\u5728\u4e8e\u65b9\u6cd5\u533a\u7684\u9759\u6001\u57df\n\n2. final \u53ef\u4ee5\u7528\u6765\u4fee\u9970\u54ea\u4e9b\u7ed3\u6784\uff0c\u5206\u522b\u8868\u793a\u4ec0\u4e48\u610f\u601d\nfinal\u53ef\u4ee5\u7528\u6765\u4fee\u9970 \u7c7b \u65b9\u6cd5 \u53d8\u91cf\nfinal \u4fee\u9970\u7c7b \u8868\u793a\u8be5\u7c7b\u4e0d\u80fd\u88ab\u7ee7\u627f\nfinal\u4fee\u9970\u65b9\u6cd5 \u8868\u793a\u8be5\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\nfinal\u4fee\u9970\u53d8\u91cf \u8868\u793a\u8be5\u53d8\u91cf\u662f\u4e2a\u5e38\u91cf\n\t\u5c24\u5176\u662ffinal\u4fee\u9970\u5f62\u53c2\u65f6\uff0c\u8868\u660e\u6b64\u5f62\u53c2\u662f\u4e00\u4e2a\u5e38\u91cf\u3002\u5f53\u6211\u4eec\u8c03\u7528\u6b64\u65b9\u6cd5\u65f6\uff0c\u7ed9\u5e38\u91cf\u5f62\u53c2\u8d4b\u4e00\u4e2a\u5b9e\u53c2\u3002\u4e00\u65e6\u8d4b\u503c\u4ee5\u540e\uff0c\u5c31\u53ea\u80fd\u5728\u65b9\u6cd5\u4f53\u5185\u4f7f\u7528\u6b64\u5f62\u53c2\uff0c\u4f46\u4e0d\u80fd\u8fdb\u884c\u91cd\u65b0\u8d4b\u503c\u3002\n\n3. \u4ee3\u7801\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u7684\u997f\u6c49\u5f0f\n\n4. \u4ee3\u7801\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u7684\u61d2\u6c49\u5f0f -\u76ee\u524d\u8fd8\u662f\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684\u3002\n\n5. \u7c7b\u7684\u5c5e\u6027\u8d4b\u503c\u7684\u4f4d\u7f6e\u6709\u54ea\u4e9b\uff1f\u5148\u540e\u987a\u5e8f\u4e3a\u4f55\uff1f\n\u9ed8\u8ba4\u521d\u59cb\u5316\n\u663e\u5f0f\u521d\u59cb\u5316\u3001\u4ee3\u7801\u5757\u4e2d\u521d\u59cb\u5316\n\u6784\u9020\u5668\u4e2d\u521d\u59cb\u5316\n\u901a\u8fc7\"\u5bf9\u8c61.\u5c5e\u6027\" \u6216 \"\u5bf9\u8c61.\u65b9\u6cd5\" \u7684\u65b9\u5f0f\u8d4b\u503c\n<\/code><\/pre>\n\n\n\n<p>\u5355\u4f8b\u6a21\u5f0f\u7684\u997f\u6c49\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P338;\n\npublic class SingletonTest1 {\n\n\tpublic static void main(String&#91;] args) {\n\t\t\n\t}\n}\n\nclass Bank{\n\t\n\tprivate Bank() {\n\t\t\n\t}\n\t\n\tprivate static Bank instance = new Bank();\n\t\n\tpublic static Bank getInstance() {\n\t\treturn instance;\n\t}\n}\n<\/code><\/pre>\n\n\n\n<p>\u5355\u4f8b\u6a21\u5f0f\u7684\u61d2\u6c49\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P338;\n\npublic class SingletonTest2 {\n\t\n\tpublic static void main(String&#91;] args) {\n\t\t\n\t}\n\n}\n\nclass Order{\n\t\n\tprivate Order() {\n\t\t\n\t}\n\t\n\tprivate static Order instance = null;\n\t\n\tprivate static Order getInstance() {\n\t\tif(instance == null) {\n\t\t\tinstance = new Order();\n\t\t}\n\t\t\n\t\treturn instance;\n\t}\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5355\u4f8b\u6a21\u5f0f\u7684\u997f\u6c49\u5f0f \u5355\u4f8b\u6a21\u5f0f\u7684\u61d2\u6c49\u5f0f<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[46],"class_list":["post-866","post","type-post","status-publish","format-standard","hentry","category-java-","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/866"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=866"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/866\/revisions"}],"predecessor-version":[{"id":2657,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/866\/revisions\/2657"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}