{"id":65183,"date":"2025-05-03T14:04:58","date_gmt":"2025-05-03T06:04:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65183\/"},"modified":"2025-05-03T14:04:58","modified_gmt":"2025-05-03T06:04:58","slug":"java%e5%90%8e%e7%ab%af%e6%95%b0%e7%bb%84%e6%9c%89%e5%93%aa%e4%ba%9b%e7%9f%a5%e8%af%86-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65183\/","title":{"rendered":"java\u540e\u7aef\u6570\u7ec4\u6709\u54ea\u4e9b\u77e5\u8bc6"},"content":{"rendered":"<blockquote><p>\n  \u6570\u7ec4\u7279\u6027\uff1a java\u6570\u7ec4\u53ef\u5b58\u50a8\u56fa\u5b9a\u957f\u5ea6\u7684\u76f8\u540c\u7c7b\u578b\u5143\u7d20\uff0c\u4f7f\u7528length\u5c5e\u6027\u83b7\u53d6\u957f\u5ea6\uff0c\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u5143\u7d20\uff0c\u652f\u6301\u591a\u7ef4\u6570\u7ec4\u548c\u63d0\u4f9b\u4e86arrays\u7c7b\u8fdb\u884c\u64cd\u4f5c\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/12\/2024111210274669487.jpg\" class=\"aligncenter\" title=\"java\u540e\u7aef\u6570\u7ec4\u6709\u54ea\u4e9b\u77e5\u8bc6\u63d2\u56fe\" alt=\"java\u540e\u7aef\u6570\u7ec4\u6709\u54ea\u4e9b\u77e5\u8bc6\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u540e\u7aef\u6570\u7ec4<\/strong><\/p>\n<p>\u6570\u7ec4\u662f Java \u4e2d\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u503c\u7684\u96c6\u5408\u3002\u5b83\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5305\u542b\u56fa\u5b9a\u957f\u5ea6\u7684\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u5e8f\u5217\u3002<\/p>\n<p><strong>\u6570\u7ec4\u77e5\u8bc6<\/strong><\/p>\n<ul>\n<li> <strong>\u58f0\u660e\u548c\u521d\u59cb\u5316\uff1a<\/strong>\u6570\u7ec4\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u58f0\u660e\uff1a<\/li>\n<\/ul>\n<pre>int[] myArray = new int[size];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d size \u662f\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u6570\u7ec4\u4e5f\u53ef\u4ee5\u5728\u58f0\u660e\u65f6\u521d\u59cb\u5316\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] myArray = {1, 2, 3, 4, 5};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li> <strong>\u8bbf\u95ee\u5143\u7d20\uff1a<\/strong>\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u7d22\u5f15\u4ece 0 \u5f00\u59cb\uff0c\u8868\u793a\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff1a<\/li>\n<\/ul>\n<pre>int element = myArray[index];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li> <strong>\u6570\u7ec4\u957f\u5ea6\uff1a<\/strong>\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u83b7\u5f97\uff1a<\/li>\n<\/ul>\n<pre>int length = myArray.length;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li> <strong>\u904d\u5386\u6570\u7ec4\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528\u5faa\u73af\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1a<\/li>\n<\/ul>\n<pre>for (int i = 0; i &lt; myArray.length; i++) {\n  \/\/ \u5904\u7406\u6570\u7ec4\u5143\u7d20\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li> <strong>\u6570\u7ec4\u548c\u57fa\u672c\u7c7b\u578b\uff1a<\/strong>\u6570\u7ec4\u662f\u5bf9\u8c61\uff0c\u800c\u57fa\u672c\u7c7b\u578b\uff08\u5982 int\uff09\u662f\u503c\u7c7b\u578b\u3002\u8fd9\u610f\u5473\u7740\u5bf9\u6570\u7ec4\u6240\u505a\u7684\u66f4\u6539\u4f1a\u5f71\u54cd\u539f\u59cb\u6570\u7ec4\uff0c\u800c\u5bf9\u57fa\u672c\u7c7b\u578b\u53d8\u91cf\u6240\u505a\u7684\u66f4\u6539\u4e0d\u4f1a\u5f71\u54cd\u539f\u59cb\u53d8\u91cf\u3002<\/li>\n<li> <strong>\u591a\u7ef4\u6570\u7ec4\uff1a<\/strong>Java \u652f\u6301\u591a\u7ef4\u6570\u7ec4\uff0c\u5176\u4e2d\u5143\u7d20\u672c\u8eab\u4e5f\u662f\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre>int[][] multiArray = new int[rows][columns];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li> <strong>\u6570\u7ec4\u5de5\u5177\u7c7b\uff1a<\/strong>Java \u63d0\u4f9b\u4e86 Arrays \u7c7b\uff0c\u5176\u4e2d\u5305\u542b\u5bf9\u6570\u7ec4\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\u7684\u5b9e\u7528\u65b9\u6cd5\uff0c\u4f8b\u5982\u6392\u5e8f\u3001\u641c\u7d22\u548c\u590d\u5236\u3002<\/li>\n<li> <strong>\u751f\u6210\u6570\u7ec4\uff1a<\/strong>Java \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u751f\u6210\u6570\u7ec4\uff0c\u4f8b\u5982\u4f7f\u7528 Stream\u3001List \u6216 Arrays.stream()\u3002<\/li>\n<li>\n<p><strong>\u907f\u514d\u5e38\u89c1\u9519\u8bef\uff1a<\/strong>\u5728\u4f7f\u7528\u6570\u7ec4\u65f6\uff0c\u9700\u8981\u907f\u514d\u4ee5\u4e0b\u5e38\u89c1\u9519\u8bef\uff1a<\/p>\n<ul>\n<li>\u8bbf\u95ee\u8d85\u51fa\u8303\u56f4\u7684\u7d22\u5f15<\/li>\n<li>\u672a\u6b63\u786e\u521d\u59cb\u5316\u6570\u7ec4<\/li>\n<li>\u5c06\u57fa\u672c\u7c7b\u578b\u53d8\u91cf\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\uff08\u5e94\u4f7f\u7528\u5305\u88c5\u7c7b\uff09<\/li>\n<li>\u5c06 null \u503c\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\uff08\u53ef\u80fd\u4f1a\u5bfc\u81f4 NullPointerException\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u540e\u7aef\u6570\u7ec4\u6709\u54ea\u4e9b\u77e5\u8bc6\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u7ec4\u7279\u6027\uff1a java\u6570\u7ec4\u53ef\u5b58\u50a8\u56fa\u5b9a\u957f\u5ea6\u7684\u76f8\u540c\u7c7b\u578b\u5143\u7d20\uff0c\u4f7f\u7528length\u5c5e\u6027\u83b7\u53d6\u957f\u5ea6\uff0c\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u5143\u7d20\uff0c\u652f\u6301\u591a\u7ef4\u6570\u7ec4\u548c\u63d0\u4f9b\u4e86arrays\u7c7b\u8fdb\u884c\u64cd\u4f5c\u3002 Java \u540e\u7aef\u6570\u7ec4 \u6570\u7ec4\u662f Java \u4e2d\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u503c\u7684\u96c6\u5408\u3002\u5b83\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5305\u542b\u56fa\u5b9a\u957f\u5ea6\u7684\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u5e8f\u5217\u3002 \u6570\u7ec4\u77e5\u8bc6 \u58f0\u660e\u548c\u521d\u59cb\u5316\uff1a\u6570\u7ec4\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u58f0\u660e\uff1a int[] myArray = new int[size]; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d size \u662f\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u6570\u7ec4\u4e5f\u53ef\u4ee5\u5728\u58f0\u660e\u65f6\u521d\u59cb\u5316\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] myArray = {1, 2, 3, 4, 5}; \u767b\u5f55\u540e\u590d\u5236 \u8bbf\u95ee\u5143\u7d20\uff1a\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u7d22\u5f15\u4ece 0 \u5f00\u59cb\uff0c\u8868\u793a\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff1a int element = myArray[index]; \u767b\u5f55\u540e\u590d\u5236 \u6570\u7ec4\u957f\u5ea6\uff1a\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u83b7\u5f97\uff1a int length = myArray.length; \u767b\u5f55\u540e\u590d\u5236 \u904d\u5386\u6570\u7ec4\uff1a\u53ef\u4ee5\u4f7f\u7528\u5faa\u73af\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1a for (int i = 0; i &lt; myArray.length; i++) { [&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-65183","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65183","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=65183"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65183\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}