{"id":81,"date":"2021-08-25T16:34:52","date_gmt":"2021-08-25T08:34:52","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/javav2\/?p=81"},"modified":"2021-08-25T16:34:52","modified_gmt":"2021-08-25T08:34:52","slug":"java-lang-system","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/javav2\/post-81.html","title":{"rendered":"java.lang.System"},"content":{"rendered":"\n<p>System\u7c7b\u662f\u57fa\u672c\u7684\u7c7b\uff0c\u4f8b\u5982System.out.println()\u7b49\u65b9\u6cd5<\/p>\n\n\n\n<p>\u5b98\u65b9\u6587\u6863\u4f20\u9001\u95e8\uff1a<a rel=\"noreferrer noopener\" href=\"https:\/\/java-api.52dixiaowo.com\/libs\/jdk-6-zh\/java\/lang\/System.html\" target=\"_blank\">java.lang.System<\/a><\/p>\n\n\n\n<h2>\u5e38\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<p>1.\u83b7\u53d6\u5f53\u524d\u7684\u65f6\u95f4(\u6beb\u79d2\u503c)<\/p>\n\n\n\n<p>System.currentTimeMillis()\u65b9\u6cd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>long time = System.currentTimeMillis();\nSystem.out.println(time); \/\/ \u5f53\u524d\u65f6\u95f4\u7684\u6beb\u79d2\u503c<\/code><\/pre>\n\n\n\n<p>2.\u590d\u5236\u6570\u7ec4<\/p>\n\n\n\n<p>System.arraycopy()\u65b9\u6cd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int&#91;] a = {1,2,3};\nint&#91;] b = new int&#91;a.length];\nSystem.out.println(\"\u590d\u5236\u524d\"+Arrays.toString(b));\nSystem.arraycopy(a,0,b,0,a.length); \/\/\u4ecea\u76840\u5f00\u59cb\uff0c\u590d\u5236\u5230b\u76840\u5f00\u59cb\uff0c\u957f\u5ea6a.length\nSystem.out.println(\"\u590d\u5236\u540e\"+Arrays.toString(b));\/\/1,2,3<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>System\u7c7b\u662f\u57fa\u672c\u7684\u7c7b\uff0c\u4f8b\u5982System.out.println()\u7b49\u65b9\u6cd5 \u5b98\u65b9\u6587\u6863\u4f20\u9001\u95e8\uff1ajava.lan&hellip; <a href=\"https:\/\/www.52dixiaowo.com\/javav2\/post-81.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">java.lang.System<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts\/81"}],"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=81"}],"version-history":[{"count":0,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/posts\/81\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/media?parent=81"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/categories?post=81"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/javav2\/wp-json\/wp\/v2\/tags?post=81"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}