{"id":467,"date":"2022-09-24T17:40:56","date_gmt":"2022-09-24T09:40:56","guid":{"rendered":"https:\/\/qaqaq.top\/?p=467"},"modified":"2022-11-27T12:40:00","modified_gmt":"2022-11-27T04:40:00","slug":"%e6%95%b0%e7%bb%84%e7%bb%83%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=467","title":{"rendered":"\u6570\u7ec4-\u7ec3\u4e60"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>1. \u4f7f\u7528\u5192\u6ce1\u6392\u5e8f\uff0c\u5b9e\u73b0\u5982\u4e0b\u7684\u6570\u7ec4\u4ece\u5c0f\u5230\u5927\u6392\u5e8f\u3002\nint&#91;] arr = new int&#91;]{34,5,22,-98,6,-76,0,-3};\n\nfor(int i = 0; i &lt; arr.length - 1; i++){\n\tfor(int j = 0; j &lt; arr.length - 1 - i; ){\n\t\tif(arr&#91;j] &gt; arr&#91;j + 1]){\n\t\t\tint temp = arr&#91;j];\n\t\t\tarr&#91;j] = arr&#91;j + 1];\n\t\t\tarr&#91;j + 1] = temp;\n\t\t}\n\t}\n}\n\n\u5feb\u6392\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(nlogn)\n\u5192\u6ce1\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(n^2)\n\u5806\u6392\u5e8f\u3001\u5f52\u5e76\u6392\u5e8f\n\n2. \u5982\u4f55\u53cd\u8f6c\u4e0a\u9762\u7684\u6570\u7ec4\u3002\u8bf7\u4ee3\u7801\u5b9e\u73b0\u3002\n\nfor(int i = 0; i &lt; arr.length \/ 2; i++){\n\tint temp = arr&#91;i];\n\tarr&#91;i] = arr&#91;arr.length - 1 - i];\n\tarr&#91;arr.length - 1 - i] = temp;\n}\n\n3. \u590d\u5236\u4e0a\u8ff0\u6570\u7ec4\uff0c\u5f97\u5230\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002\n\nvs \u8d4b\u503c\u64cd\u4f5c\narray2 = array1;\n\n\u590d\u5236\u64cd\u4f5c\uff1a\nint&#91;] arr1 = new int&#91;arr.length];\nfor(int i = 0; i &lt; arr1.length; i++){\n\tarr1&#91;i] = arr&#91;i];\n}\n\n4. \u4f7f\u7528\u7ebf\u6027\u67e5\u627e\uff0c\u4ece\u4e0a\u8ff0\u6570\u7ec4\u4e2d\u67e5\u627e22\u662f\u5426\u5b58\u5728\u3002\u5b58\u5728\uff0c\u8fd4\u56de\u6240\u5728\u4f4d\u7f6e\u7684\u7d22\u5f15\u3002\u4e0d\u5b58\u5728\uff0c\u8f93\u51fa\u63d0\u793a\u4fe1\u606f\u3002\n\nint dest = 22;\nboolean isFlag = true;\nfor(int i = 0; i &lt; arr.length; i++){\n\tif(dest == arr&#91;i]){\n\t\tSystem.out.println(i);\n\t\tisFlag = false;\n\t\tbreak;\n\t}\n}\n\nif(isFlag){\n\tsystem.out.println(\"\u672a\u627e\u5230\");\n}\n\n\u6216\n\nint dest = 22;\nfor(int i = 0; i &lt; arr.length; i++){\n\tif(dest == arr&#91;i]){\n\t\tSystem.out.println(i);\n\t\tbreak;\n\t}\n}\n\nif(i == arr.length){\n\tsystem.out.println(\"\u672a\u627e\u5230\");\n}\n\n5. \u6570\u7ec4\u4e2d\u5e38\u89c1\u7684\u5f02\u5e38\u6709\u54ea\u4e9b\uff1f\u8bf7\u4e3e\u4f8b\u8bf4\u660e\n\n\u2460 ArrayIndexOutOfBoundsException\uff1a\u6570\u7ec4\u89d2\u6807\u8d8a\u754c\u5f02\u5e38\n\u5408\u7406\u8303\u56f4\uff1a&#91;0,arr.length - 1]\n\u8d8a\u754c\uff1aarr&#91;-1],arr&#91;arr.length]\n\n\u2461 NullPointerExcePtion\uff1a\u7a7a\u6307\u9488\u5f02\u5e38\n\nint&#91;] arr = null;\narr&#91;0];\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","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-467","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\/467"}],"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=467"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/467\/revisions"}],"predecessor-version":[{"id":485,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/467\/revisions\/485"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}