{"id":40163,"date":"2024-11-26T09:41:57","date_gmt":"2024-11-26T01:41:57","guid":{"rendered":"https:\/\/fwq.ai\/blog\/40163\/"},"modified":"2024-11-26T09:41:57","modified_gmt":"2024-11-26T01:41:57","slug":"java%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba%e4%b8%80%e4%b8%aa%e6%95%b0%e5%9c%a8%e6%95%b0%e7%bb%84%e5%86%85","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/40163\/","title":{"rendered":"java\u600e\u4e48\u8868\u793a\u4e00\u4e2a\u6570\u5728\u6570\u7ec4\u5185"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u5b58\u5728\uff1a\u4f7f\u7528 equals() \u65b9\u6cd5\uff08\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff09\u4f7f\u7528 for-each \u5faa\u73af\uff08\u6240\u6709\u7c7b\u578b\u6570\u7ec4\uff09\u4f7f\u7528 arrays.binarysearch() \u65b9\u6cd5\uff08\u5df2\u6392\u5e8f\u6570\u7ec4\uff09\u4f7f\u7528 arrays.aslist() \u65b9\u6cd5\u548c list \u7684 contains() \u65b9\u6cd5\uff08\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff09\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111721482455689.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u8868\u793a\u4e00\u4e2a\u6570\u5728\u6570\u7ec4\u5185\u63d2\u56fe\" alt=\"java\u600e\u4e48\u8868\u793a\u4e00\u4e2a\u6570\u5728\u6570\u7ec4\u5185\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u65b9\u6cd5<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u5b58\u5728\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 equals() \u65b9\u6cd5<\/strong><\/p>\n<p>\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff08\u5982 int[] \u548c double[]\uff09\uff0c\u53ef\u4ee5\u5c06\u5143\u7d20\u4e0e\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u6bd4\u8f83\u3002\u5982\u679c\u5143\u7d20\u4e0e\u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u76f8\u7b49\uff0c\u5219\u8be5\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint element = 3;\n\nif (Arrays.equals(arr, element)) {\n    System.out.println(\"\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n} else {\n    System.out.println(\"\u5143\u7d20\u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 for-each \u5faa\u73af<\/strong><\/p>\n<p>\u5bf9\u4e8e\u6240\u6709\u7c7b\u578b\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 for-each \u5faa\u73af\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u3002\u5982\u679c\u5143\u7d20\u4e0e\u6570\u7ec4\u4e2d\u7684\u4efb\u4f55\u5143\u7d20\u76f8\u7b49\uff0c\u5219\u8be5\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\u3002<\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint element = 3;\nboolean found = false;\n\nfor (int num : arr) {\n    if (num == element) {\n        found = true;\n        break;\n    }\n}\n\nif (found) {\n    System.out.println(\"\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n} else {\n    System.out.println(\"\u5143\u7d20\u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528 Arrays.binarySearch() \u65b9\u6cd5\uff08\u4ec5\u9650\u4e8e\u5df2\u6392\u5e8f\u7684\u6570\u7ec4\uff09<\/strong><\/p>\n<p>\u5982\u679c\u6570\u7ec4\u5df2\u6392\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.binarySearch() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u7d22\u5f15\uff0c\u5982\u679c\u5143\u7d20\u5b58\u5728\u3002\u5982\u679c\u8fd4\u56de\u7684\u7d22\u5f15\u4e3a -1\uff0c\u5219\u5143\u7d20\u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\u3002<\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint element = 3;\n\nint index = Arrays.binarySearch(arr, element);\nif (index &gt;= 0) {\n    System.out.println(\"\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n} else {\n    System.out.println(\"\u5143\u7d20\u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u4f7f\u7528 Arrays.asList() \u65b9\u6cd5<\/strong><\/p>\n<p>\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff0c\u53ef\u4ee5\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a List\uff0c\u5e76\u4f7f\u7528 List \u7684 contns() \u65b9\u6cd5\u6765\u68c0\u67e5\u5143\u7d20\u662f\u5426\u5b58\u5728\u3002<\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint element = 3;\n\nList&lt;Integer&gt; list = Arrays.asList(arr);\nif (list.contains(element)) {\n    System.out.println(\"\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n} else {\n    System.out.println(\"\u5143\u7d20\u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u901a\u8fc7\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u5728 Java \u4e2d\u786e\u5b9a\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u5728\u6570\u7ec4\u5185\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u8868\u793a\u4e00\u4e2a\u6570\u5728\u6570\u7ec4\u5185\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u5b58\u5728\uff1a\u4f7f\u7528 equals() \u65b9\u6cd5\uff08\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff09\u4f7f\u7528 for-each \u5faa\u73af\uff08\u6240\u6709\u7c7b\u578b\u6570\u7ec4\uff09\u4f7f\u7528 arrays.binarysearch() \u65b9\u6cd5\uff08\u5df2\u6392\u5e8f\u6570\u7ec4\uff09\u4f7f\u7528 arrays.aslist() \u65b9\u6cd5\u548c list \u7684 contains() \u65b9\u6cd5\uff08\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff09 Java \u4e2d\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u65b9\u6cd5 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u5b58\u5728\uff1a 1. \u4f7f\u7528 equals() \u65b9\u6cd5 \u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff08\u5982 int[] \u548c double[]\uff09\uff0c\u53ef\u4ee5\u5c06\u5143\u7d20\u4e0e\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u6bd4\u8f83\u3002\u5982\u679c\u5143\u7d20\u4e0e\u6570\u7ec4\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u76f8\u7b49\uff0c\u5219\u8be5\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] arr = {1, 2, 3, 4, 5}; int element = 3; if (Arrays.equals(arr, element)) { System.out.println(&#8220;\u5143\u7d20\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d&#8221;); } else { System.out.println(&#8220;\u5143\u7d20\u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d&#8221;); } \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 for-each [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-40163","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=40163"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40163\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=40163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=40163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=40163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}