{"id":64259,"date":"2025-05-03T15:00:05","date_gmt":"2025-05-03T07:00:05","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64259\/"},"modified":"2025-05-03T15:00:05","modified_gmt":"2025-05-03T07:00:05","slug":"java%e6%80%8e%e4%b9%88%e5%be%80%e6%95%b0%e7%bb%84%e6%b7%bb%e5%8a%a0%e5%ad%97%e7%ac%a6%e4%b8%b2-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64259\/","title":{"rendered":"java\u600e\u4e48\u5f80\u6570\u7ec4\u6dfb\u52a0\u5b57\u7b26\u4e32"},"content":{"rendered":"<blockquote><p>\n  \u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5411 java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32\uff1a\u58f0\u660e\u4e00\u4e2a\u5df2\u5206\u914d\u7a7a\u95f4\u7684\u6570\u7ec4\u3002\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u8bbf\u95ee\u548c\u8bbe\u7f6e\u5143\u7d20\u3002\u5982\u679c\u9700\u8981\u5728\u672b\u5c3e\u6dfb\u52a0\u5143\u7d20\uff0c\u5219\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110302183496250.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5f80\u6570\u7ec4\u6dfb\u52a0\u5b57\u7b26\u4e32\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5f80\u6570\u7ec4\u6dfb\u52a0\u5b57\u7b26\u4e32\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32<\/strong><\/p>\n<p>Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u7684\u6570\u636e\u5143\u7d20\u3002\u8981\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4e3a\u6570\u7ec4\u5206\u914d\u7a7a\u95f4<\/strong><\/p>\n<p>\u9996\u5148\uff0c\u9700\u8981\u4e3a\u6570\u7ec4\u5206\u914d\u7a7a\u95f4\u3002\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>int[] myArray = new int[size]; \/\/ \u58f0\u660e\u4e00\u4e2a\u5927\u5c0f\u4e3a size \u7684\u6574\u6570\u6570\u7ec4<\/li>\n<li>String[] myArray = {&#8220;a&#8221;, &#8220;b&#8221;, &#8220;c&#8221;}; \/\/ \u58f0\u660e\u4e00\u4e2a\u5305\u542b\u5b57\u7b26\u4e32\u7684\u6570\u7ec4<\/li>\n<\/ul>\n<p><strong>2. \u4f7f\u7528\u6570\u7ec4\u7d22\u5f15<\/strong><\/p>\n<p>\u8981\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u3002\u6570\u7ec4\u7d22\u5f15\u4ece 0 \u5f00\u59cb\uff0c\u4ee3\u8868\u6570\u7ec4\u4e2d\u7684\u4e00\u4e2a\u4f4d\u7f6e\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\uff1a<\/p>\n<pre>myArray[index] = value;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5<\/strong><\/p>\n<p>\u5982\u679c\u9700\u8981\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u5df2\u6709\u6570\u7ec4\u7684\u672b\u5c3e\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u5305\u542b\u539f\u59cb\u6570\u7ec4\u548c\u65b0\u5143\u7d20\u3002<\/p>\n<pre>String[] newArray = Arrays.copyOf(myArray, myArray.length + 1);\nnewArray[myArray.length] = \"newElement\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u8303\u4f8b\uff1a<\/strong><\/p>\n<pre>String[] names = new String[3]; \/\/ \u58f0\u660e\u4e00\u4e2a\u5927\u5c0f\u4e3a 3 \u7684\u5b57\u7b26\u4e32\u6570\u7ec4\n\n\/\/ \u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32\nnames[0] = \"John\";\nnames[1] = \"Jane\";\nnames[2] = \"Jack\";\n\n\/\/ \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\nString[] newNames = Arrays.copyOf(names, names.length + 1);\nnewNames[names.length] = \"Jill\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728 Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5f80\u6570\u7ec4\u6dfb\u52a0\u5b57\u7b26\u4e32\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>\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5411 java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32\uff1a\u58f0\u660e\u4e00\u4e2a\u5df2\u5206\u914d\u7a7a\u95f4\u7684\u6570\u7ec4\u3002\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u8bbf\u95ee\u548c\u8bbe\u7f6e\u5143\u7d20\u3002\u5982\u679c\u9700\u8981\u5728\u672b\u5c3e\u6dfb\u52a0\u5143\u7d20\uff0c\u5219\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u3002 \u5982\u4f55\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32 Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u7684\u6570\u636e\u5143\u7d20\u3002\u8981\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. \u4e3a\u6570\u7ec4\u5206\u914d\u7a7a\u95f4 \u9996\u5148\uff0c\u9700\u8981\u4e3a\u6570\u7ec4\u5206\u914d\u7a7a\u95f4\u3002\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u65b9\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] myArray = new int[size]; \/\/ \u58f0\u660e\u4e00\u4e2a\u5927\u5c0f\u4e3a size \u7684\u6574\u6570\u6570\u7ec4 String[] myArray = {&#8220;a&#8221;, &#8220;b&#8221;, &#8220;c&#8221;}; \/\/ \u58f0\u660e\u4e00\u4e2a\u5305\u542b\u5b57\u7b26\u4e32\u7684\u6570\u7ec4 2. \u4f7f\u7528\u6570\u7ec4\u7d22\u5f15 \u8981\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u3002\u6570\u7ec4\u7d22\u5f15\u4ece 0 \u5f00\u59cb\uff0c\u4ee3\u8868\u6570\u7ec4\u4e2d\u7684\u4e00\u4e2a\u4f4d\u7f6e\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\uff1a myArray[index] = value; \u767b\u5f55\u540e\u590d\u5236 3. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5 \u5982\u679c\u9700\u8981\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u5df2\u6709\u6570\u7ec4\u7684\u672b\u5c3e\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u5305\u542b\u539f\u59cb\u6570\u7ec4\u548c\u65b0\u5143\u7d20\u3002 String[] newArray = Arrays.copyOf(myArray, myArray.length + [&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-64259","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64259","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=64259"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64259\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}