{"id":66752,"date":"2025-05-03T17:58:44","date_gmt":"2025-05-03T09:58:44","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66752\/"},"modified":"2025-05-03T17:58:44","modified_gmt":"2025-05-03T09:58:44","slug":"java%e6%80%8e%e4%b9%88%e5%be%80%e6%95%b0%e7%bb%84%e9%87%8c%e5%8a%a0%e5%ad%97%e7%ac%a6%e4%b8%b2-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66752\/","title":{"rendered":"java\u600e\u4e48\u5f80\u6570\u7ec4\u91cc\u52a0\u5b57\u7b26\u4e32"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u6570\u7ec4\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5e76\u4f7f\u7528\u7d22\u5f15\u6dfb\u52a0\u5b57\u7b26\u4e32\u3002\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u73b0\u6709\u6570\u7ec4\u548c\u8981\u6dfb\u52a0\u5b57\u7b26\u4e32\u7684\u65b0\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/16\/2024111622072126902.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5f80\u6570\u7ec4\u91cc\u52a0\u5b57\u7b26\u4e32\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5f80\u6570\u7ec4\u91cc\u52a0\u5b57\u7b26\u4e32\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 Java \u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u6570\u7ec4\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n<p><strong>\u65b9\u6cd5 1\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4<\/strong><\/p>\n<p>\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u6307\u5b9a\u6570\u7ec4\u5927\u5c0f\u3002\u7136\u540e\uff0c\u4f7f\u7528\u7d22\u5f15\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u4e2d\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>String[] names = new String[3];\nnames[0] = \"John\";\nnames[1] = \"Mary\";\nnames[2] = \"Bob\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u65b9\u6cd5 2\uff1a\u4f7f\u7528 Arrays.copyOf()<\/strong><\/p>\n<p>\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4ee5\u53ca\u8981\u6dfb\u52a0\u7684\u989d\u5916\u5143\u7d20\uff1a<\/p>\n<pre>String[] names = {\"John\", \"Mary\"};\nString[] newNames = Arrays.copyOf(names, names.length + 1);\nnewNames[names.length] = \"Bob\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b<\/strong><\/p>\n<p>\u8bf7\u6ce8\u610f\uff0c\u6b64\u793a\u4f8b\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u672b\u5c3e\u3002\u5982\u679c\u60a8\u5e0c\u671b\u5c06\u5b57\u7b26\u4e32\u63d2\u5165\u6570\u7ec4\u4e2d\u7684\u7279\u5b9a\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e0a\u8ff0\u65b9\u6cd5\u7684\u793a\u4f8b\uff1a<\/p>\n<pre>\/\/ \u65b9\u6cd5 1\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\nString[] names1 = new String[3];\nnames1[0] = \"John\";\nnames1[1] = \"Mary\";\nnames1[2] = \"Bob\";\n\n\/\/ \u65b9\u6cd5 2\uff1a\u4f7f\u7528 Arrays.copyOf()\nString[] names2 = {\"John\", \"Mary\"};\nString[] newNames2 = Arrays.copyOf(names2, names2.length + 1);\nnewNames2[names2.length] = \"Bob\";\n\n\/\/ \u6253\u5370\u6570\u7ec4\nSystem.out.println(\"\u65b9\u6cd5 1\uff1a\");\nfor (String name : names1) {\n    System.out.println(name);\n}\n\nSystem.out.println(\"\u65b9\u6cd5 2\uff1a\");\nfor (String name : newNames2) {\n    System.out.println(name);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>\u65b9\u6cd5 1\uff1a\nJohn\nMary\nBob\n\u65b9\u6cd5 2\uff1a\nJohn\nMary\nBob<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5f80\u6570\u7ec4\u91cc\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>\u5728 java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u6570\u7ec4\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5e76\u4f7f\u7528\u7d22\u5f15\u6dfb\u52a0\u5b57\u7b26\u4e32\u3002\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u73b0\u6709\u6570\u7ec4\u548c\u8981\u6dfb\u52a0\u5b57\u7b26\u4e32\u7684\u65b0\u6570\u7ec4\u3002 \u5982\u4f55\u4f7f\u7528 Java \u5728\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5b57\u7b26\u4e32 \u5728 Java \u4e2d\uff0c\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u6570\u7ec4\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a \u65b9\u6cd5 1\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4 \u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u6307\u5b9a\u6570\u7ec4\u5927\u5c0f\u3002\u7136\u540e\uff0c\u4f7f\u7528\u7d22\u5f15\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u4e2d\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b String[] names = new String[3]; names[0] = &#8220;John&#8221;; names[1] = &#8220;Mary&#8221;; names[2] = &#8220;Bob&#8221;; \u767b\u5f55\u540e\u590d\u5236 \u65b9\u6cd5 2\uff1a\u4f7f\u7528 Arrays.copyOf() \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4ee5\u53ca\u8981\u6dfb\u52a0\u7684\u989d\u5916\u5143\u7d20\uff1a String[] names = {&#8220;John&#8221;, &#8220;Mary&#8221;}; String[] newNames = Arrays.copyOf(names, names.length + 1); newNames[names.length] = &#8220;Bob&#8221;; \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b [&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-66752","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66752","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=66752"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66752\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}