{"id":66778,"date":"2025-05-03T10:49:59","date_gmt":"2025-05-03T02:49:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66778\/"},"modified":"2025-05-03T10:49:59","modified_gmt":"2025-05-03T02:49:59","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e5%be%80%e6%95%b0%e7%bb%84%e4%b8%ad%e6%b7%bb%e5%8a%a0%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66778\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u5f80\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20"},"content":{"rendered":"<p><strong>java \u4e2d\u5f80\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n<p><strong>\u76f4\u63a5\u8d4b\u503c:<\/strong><\/p>\n<p>\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u5c06\u5143\u7d20\u8d4b\u503c\u7ed9\u6570\u7ec4\u4e2d\u7684\u7279\u5b9a\u7d22\u5f15\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] arr = new int[10];\narr[0] = 1;\narr[1] = 2;\narr[2] = 3;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Arrays.fill() \u65b9\u6cd5:<\/strong><\/p>\n<p>Arrays.fill() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a\u76f8\u540c\u7684\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] arr = new int[10];\nArrays.fill(arr, 1);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5:<\/strong><\/p>\n<p>Arrays.copyOf() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u6570\u7ec4\u7684\u65b0\u526f\u672c\uff0c\u5b83\u5305\u542b\u73b0\u6709\u7684\u6570\u7ec4\u548c\u9644\u52a0\u7684\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] arr1 = new int[] {1, 2, 3};\nint[] arr2 = Arrays.copyOf(arr1, arr1.length + 1);\narr2[arr2.length - 1] = 4;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 List \u7136\u540e\u8f6c\u6362\u4e3a\u6570\u7ec4:<\/strong><\/p>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528 List \u6765\u5b58\u50a8\u5143\u7d20\uff0c\u7136\u540e\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>List&lt;Integer&gt; list = new ArrayList&lt;&gt;();\nlist.add(1);\nlist.add(2);\nlist.add(3);\nint[] arr = new int[list.size()];\nfor (int i = 0; i &lt; list.size(); i++) {\n    arr[i] = list.get(i);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u5f80\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\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>java \u4e2d\u5f80\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20 \u76f4\u63a5\u8d4b\u503c: \u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u5c06\u5143\u7d20\u8d4b\u503c\u7ed9\u6570\u7ec4\u4e2d\u7684\u7279\u5b9a\u7d22\u5f15\u3002\u4f8b\u5982\uff1a int[] arr = new int[10]; arr[0] = 1; arr[1] = 2; arr[2] = 3; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Arrays.fill() \u65b9\u6cd5: Arrays.fill() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a\u76f8\u540c\u7684\u503c\u3002\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] arr = new int[10]; Arrays.fill(arr, 1); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5: Arrays.copyOf() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u6570\u7ec4\u7684\u65b0\u526f\u672c\uff0c\u5b83\u5305\u542b\u73b0\u6709\u7684\u6570\u7ec4\u548c\u9644\u52a0\u7684\u5143\u7d20\u3002\u4f8b\u5982\uff1a int[] arr1 = new int[] {1, 2, 3}; int[] arr2 = Arrays.copyOf(arr1, arr1.length + 1); arr2[arr2.length &#8211; [&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-66778","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66778","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=66778"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66778\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}