{"id":39749,"date":"2024-11-26T16:52:36","date_gmt":"2024-11-26T08:52:36","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39749\/"},"modified":"2024-11-26T16:52:36","modified_gmt":"2024-11-26T08:52:36","slug":"java%e6%80%8e%e4%b9%88%e5%88%a4%e6%96%ad%e6%95%b0%e7%bb%84%e9%87%8c%e6%98%af%e5%90%a6%e6%9c%89%e8%bf%99%e4%b8%aa%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39749\/","title":{"rendered":"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u91cc\u662f\u5426\u6709\u8fd9\u4e2a\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  \u8981\u5728 java \u4e2d\u68c0\u67e5\u6570\u7ec4\u4e2d\u662f\u5426\u5b58\u5728\u5143\u7d20\uff0c\u53ef\u4ee5\uff1a1. \u4f7f\u7528 arrays.aslist() \u548c contains() \u65b9\u6cd5\uff08\u9002\u7528\u4e8e\u65e0\u5e8f\u6570\u7ec4\uff09\uff1b2. \u4f7f\u7528 arrays.binarysearch() \u65b9\u6cd5\uff08\u9002\u7528\u4e8e\u5df2\u6392\u5e8f\u6570\u7ec4\uff09\uff1b3. \u4f7f\u7528\u5faa\u73af\u904d\u5386\u6570\u7ec4\u8fdb\u884c\u6bd4\u8f83\uff08\u9002\u7528\u4e8e\u4efb\u4f55\u6570\u7ec4\uff09\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111709242112964.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u91cc\u662f\u5426\u6709\u8fd9\u4e2a\u5143\u7d20\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u91cc\u662f\u5426\u6709\u8fd9\u4e2a\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u5224\u65ad\u6570\u7ec4\u4e2d\u662f\u5426\u5b58\u5728\u5143\u7d20<\/strong><\/p>\n<p>\u5224\u65ad\u6570\u7ec4\u4e2d\u662f\u5426\u5b58\u5728\u7279\u5b9a\u5143\u7d20\u662f Java \u4e2d\u4e00\u9879\u5e38\u89c1\u4efb\u52a1\u3002\u4ee5\u4e0b\u4ecb\u7ecd\u51e0\u79cd\u5b9e\u73b0\u6b64\u529f\u80fd\u7684\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 Java 8 \u7684 Arrays.asList() \u65b9\u6cd5<\/strong><\/p>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u4f7f\u7528 Arrays.asList() \u65b9\u6cd5\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528 contns() \u65b9\u6cd5\u68c0\u67e5\u5143\u7d20\u662f\u5426\u5b58\u5728\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint targetElement = 3;\n\nif (Arrays.asList(arr).contains(targetElement)) {\n    System.out.println(\"\u5143\u7d20 \" + targetElement + \" \u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n} else {\n    System.out.println(\"\u5143\u7d20 \" + targetElement + \" \u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 Java 5 \u7684 java.util.Arrays.binarySearch() \u65b9\u6cd5<\/strong><\/p>\n<p>Arrays.binarySearch() \u65b9\u6cd5\u6267\u884c\u4e8c\u5206\u67e5\u627e\uff0c\u8be5\u65b9\u6cd5\u4ec5\u9002\u7528\u4e8e\u5df2\u6392\u5e8f\u7684\u6570\u7ec4\uff1a<\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint targetElement = 3;\n\nint index = Arrays.binarySearch(arr, targetElement);\n\nif (index &gt;= 0) {\n    System.out.println(\"\u5143\u7d20 \" + targetElement + \" \u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n} else {\n    System.out.println(\"\u5143\u7d20 \" + targetElement + \" \u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528\u5faa\u73af<\/strong><\/p>\n<p>\u5faa\u73af\u904d\u5386\u6570\u7ec4\u5e76\u6bd4\u8f83\u6bcf\u4e2a\u5143\u7d20\u4e0e\u76ee\u6807\u5143\u7d20\uff1a<\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint targetElement = 3;\n\nboolean found = false;\nfor (int i = 0; i &lt; arr.length; i++) {\n    if (arr[i] == targetElement) {\n        found = true;\n        break;\n    }\n}\n\nif (found) {\n    System.out.println(\"\u5143\u7d20 \" + targetElement + \" \u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n} else {\n    System.out.println(\"\u5143\u7d20 \" + targetElement + \" \u4e0d\u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d\");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6548\u7387\u6bd4\u8f83<\/strong><\/p>\n<ul>\n<li>\u5bf9\u4e8e\u65e0\u5e8f\u6570\u7ec4\uff0c\u4f7f\u7528 java.util.Arrays.binarySearch() \u65b9\u6cd5\u6548\u7387\u6700\u4f4e\uff0c\u56e0\u4e3a\u9996\u5148\u9700\u8981\u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n<li>\u5bf9\u4e8e\u7531\u5c11\u91cf\u5143\u7d20\u7ec4\u6210\u7684\u6570\u7ec4\uff0c\u4f7f\u7528 Arrays.asList() \u65b9\u6cd5\u6548\u7387\u8f83\u9ad8\u3002<\/li>\n<li>\u5bf9\u4e8e\u8f83\u5927\u7684\u6570\u7ec4\uff0c\u4f7f\u7528\u57fa\u4e8e\u5faa\u73af\u7684\u65b9\u6cd5\u6548\u7387\u6700\u9ad8\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u91cc\u662f\u5426\u6709\u8fd9\u4e2a\u5143\u7d20\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>\u8981\u5728 java \u4e2d\u68c0\u67e5\u6570\u7ec4\u4e2d\u662f\u5426\u5b58\u5728\u5143\u7d20\uff0c\u53ef\u4ee5\uff1a1. \u4f7f\u7528 arrays.aslist() \u548c contains() \u65b9\u6cd5\uff08\u9002\u7528\u4e8e\u65e0\u5e8f\u6570\u7ec4\uff09\uff1b2. \u4f7f\u7528 arrays.binarysearch() \u65b9\u6cd5\uff08\u9002\u7528\u4e8e\u5df2\u6392\u5e8f\u6570\u7ec4\uff09\uff1b3. \u4f7f\u7528\u5faa\u73af\u904d\u5386\u6570\u7ec4\u8fdb\u884c\u6bd4\u8f83\uff08\u9002\u7528\u4e8e\u4efb\u4f55\u6570\u7ec4\uff09\u3002 \u5982\u4f55\u5728 Java \u4e2d\u5224\u65ad\u6570\u7ec4\u4e2d\u662f\u5426\u5b58\u5728\u5143\u7d20 \u5224\u65ad\u6570\u7ec4\u4e2d\u662f\u5426\u5b58\u5728\u7279\u5b9a\u5143\u7d20\u662f Java \u4e2d\u4e00\u9879\u5e38\u89c1\u4efb\u52a1\u3002\u4ee5\u4e0b\u4ecb\u7ecd\u51e0\u79cd\u5b9e\u73b0\u6b64\u529f\u80fd\u7684\u65b9\u6cd5\uff1a 1. \u4f7f\u7528 Java 8 \u7684 Arrays.asList() \u65b9\u6cd5 \u8fd9\u79cd\u65b9\u6cd5\u4f7f\u7528 Arrays.asList() \u65b9\u6cd5\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528 contns() \u65b9\u6cd5\u68c0\u67e5\u5143\u7d20\u662f\u5426\u5b58\u5728\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] arr = {1, 2, 3, 4, 5}; int targetElement = 3; if (Arrays.asList(arr).contains(targetElement)) { System.out.println(&#8220;\u5143\u7d20 &#8221; + targetElement + &#8221; \u5b58\u5728\u4e8e\u6570\u7ec4\u4e2d&#8221;); } else [&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-39749","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39749","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=39749"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39749\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}