{"id":31260,"date":"2023-05-30T05:23:32","date_gmt":"2023-06-06T10:29:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f%e6%98%af%e4%bb%80%e4%b9%88-2\/"},"modified":"2025-08-12T23:06:51","modified_gmt":"2025-08-12T15:06:51","slug":"java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f%e6%98%af%e4%bb%80%e4%b9%88-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f%e6%98%af%e4%bb%80%e4%b9%88-2\/","title":{"rendered":"Java\u7684\u5355\u4f8b\u6a21\u5f0f\u662f\u4ec0\u4e48"},"content":{"rendered":"<h2>\u5355\u4f8b\u6a21\u5f0f\u662f\u4ec0\u4e48<\/h2>\n<p>&nbsp;<\/p>\n<h2>\u5355\u4f8b\u6a21\u5f0f\u65b9\u6cd5<\/h2>\n<pre class=\"post-pre\"><code><span class=\"kn\">package<\/span> <span class=\"nn\">singleton<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.util.Calendar<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Company<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u5185\u90e8\u3067Instance\u3092\u751f\u6210<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">Company<\/span> <span class=\"n\">instance<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Company<\/span><span class=\"o\">();<\/span>\r\n\r\n    <span class=\"c1\">\/\/ private\u306a constructor<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nf\">Company<\/span><span class=\"o\">()<\/span> <span class=\"o\">{}<\/span>\r\n\r\n    <span class=\"c1\">\/\/ \u552f\u4e00\u306aInstance\u3092get()<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">Company<\/span> <span class=\"nf\">getInstance<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span> <span class=\"n\">instance<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"n\">instance<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Company<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">instance<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6784\u9020\u51fd\u6570\u8bbe\u4e3a\u79c1\u6709\u3002<\/p>\n<p>\u5982\u679c\u6784\u9020\u51fd\u6570\u662f\u79c1\u6709\u7684\u8bdd\uff0c\u5c31\u4e0d\u80fd\u4ece\u5916\u90e8\u751f\u6210\u5b9e\u4f8b\uff0c\u6240\u4ee5\u8981\u5728\u5185\u90e8\u7528new\u6765\u751f\u6210\u5b9e\u4f8b\u3002<br \/>\n\u7136\u540e\u751f\u6210\u4e00\u4e2a\u516c\u5171\u7684\u9759\u6001\u7684get\u65b9\u6cd5\uff0c\u5728\u5916\u90e8\u53ea\u80fd\u901a\u8fc7\u8fd9\u4e2a\u65b9\u6cd5\u6765\u5f15\u7528\u552f\u4e00\u7684\u5bf9\u8c61\uff01<br \/>\n\u65e0\u8bba\u8c03\u7528\u591a\u5c11\u6b21\uff0c\u90fd\u4f1a\u8fd4\u56de\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\uff08\u5f15\u7528\u503c\u90fd\u662f\u4e00\u6837\u7684\uff01\uff09<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0ba337434c4406be6ba8\/7-0.png\" alt=\"image.png\" \/><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u5355\u4f8b\u6a21\u5f0f\u662f\u4ec0\u4e48 &nbsp; \u5355\u4f8b\u6a21\u5f0f\u65b9\u6cd5 package singleton; import java.ut [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31260","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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