{"id":37643,"date":"2024-11-26T11:16:26","date_gmt":"2024-11-26T03:16:26","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37643\/"},"modified":"2024-11-26T11:16:26","modified_gmt":"2024-11-26T03:16:26","slug":"java%e5%bb%ba%e7%ab%8b%e6%95%b0%e7%bb%84%e5%90%8e%e6%80%8e%e4%b9%88%e6%89%a9%e5%ae%b9","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37643\/","title":{"rendered":"java\u5efa\u7acb\u6570\u7ec4\u540e\u600e\u4e48\u6269\u5bb9"},"content":{"rendered":"<blockquote><p>\n  java\u4e2d\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u6269\u5bb9\u6570\u7ec4\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528\u66f4\u5927\u7684\u6570\u7ec4\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u590d\u5236\u65e7\u6570\u7ec4\u5143\u7d20\uff0c\u65e7\u6570\u7ec4\u6307\u5411\u65b0\u6570\u7ec4\u3002\u4f7f\u7528arraylist\uff1a\u521b\u5efa\u53ef\u53d8\u957f\u5ea6arraylist\uff0c\u6dfb\u52a0\u65e7\u6570\u7ec4\u5143\u7d20\u3002\u4f7f\u7528system.arraycopy\uff1a\u590d\u5236\u6570\u7ec4\u5143\u7d20\u5230\u76ee\u6807\u6570\u7ec4\uff0c\u76ee\u6807\u6570\u7ec4\u66f4\u5927\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111308130135679.jpg\" class=\"aligncenter\" title=\"java\u5efa\u7acb\u6570\u7ec4\u540e\u600e\u4e48\u6269\u5bb9\u63d2\u56fe\" alt=\"java\u5efa\u7acb\u6570\u7ec4\u540e\u600e\u4e48\u6269\u5bb9\u63d2\u56fe\" \/><\/p>\n<p><strong>Java\u4e2d\u6269\u5bb9\u6570\u7ec4<\/strong><\/p>\n<p>Java\u4e2d\uff0c\u6570\u7ec4\u7684\u5927\u5c0f\u5728\u521b\u5efa\u540e\u662f\u56fa\u5b9a\u7684\u3002\u5982\u679c\u9700\u8981\u6269\u5bb9\u6570\u7ec4\u4ee5\u5bb9\u7eb3\u66f4\u591a\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>\u4f7f\u7528\u66f4\u5927\u7684\u6570\u7ec4<\/strong><\/p>\n<p>\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\uff0c\u5c06\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u7136\u540e\u5c06\u73b0\u6709\u6570\u7ec4\u6307\u5411\u65b0\u6570\u7ec4\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] oldArray = {1, 2, 3};\nint[] newArray = new int[5];\n\n\/\/ \u5c06\u65e7\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\nfor (int i = 0; i &lt; oldArray.length; i++) {\n    newArray[i] = oldArray[i];\n}\n\n\/\/ \u6307\u5411\u65b0\u6570\u7ec4\noldArray = newArray;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528ArrayList<\/strong><\/p>\n<p>ArrayList\u662f\u4e00\u79cd\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u81ea\u52a8\u6269\u5bb9\u3002\u521b\u5efa\u4e00\u4e2aArrayList\uff0c\u7136\u540e\u6dfb\u52a0\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<pre>ArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;();\n\n\/\/ \u6dfb\u52a0\u65e7\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\nfor (int element : oldArray) {\n    list.add(element);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528System.arraycopy<\/strong><\/p>\n<p>System.arraycopy\u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u901a\u8fc7\u4f20\u9012\u4e00\u4e2a\u6bd4\u73b0\u6709\u6570\u7ec4\u66f4\u5927\u7684\u76ee\u6807\u6570\u7ec4\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6269\u5bb9\u3002<\/p>\n<pre>int[] oldArray = {1, 2, 3};\nint[] newArray = new int[5];\n\nSystem.arraycopy(oldArray, 0, newArray, 0, oldArray.length);\n\n\/\/ \u6307\u5411\u65b0\u6570\u7ec4\noldArray = newArray;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u6269\u5bb9\u6570\u7ec4\u540e\uff0c\u65e7\u6570\u7ec4\u4e2d\u7684\u5f15\u7528\u5c06\u6307\u5411\u65b0\u7684\u6269\u5bb9\u6570\u7ec4\u3002<\/li>\n<li>\u6269\u5bb9\u6570\u7ec4\u7684\u6548\u7387\u53d6\u51b3\u4e8e\u6240\u4f7f\u7528\u7684\u65b9\u6cd5\u3002<\/li>\n<li>\u5728\u6267\u884c\u6269\u5bb9\u64cd\u4f5c\u4e4b\u524d\uff0c\u5e94\u8003\u8651\u6027\u80fd\u548c\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u5efa\u7acb\u6570\u7ec4\u540e\u600e\u4e48\u6269\u5bb9\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>java\u4e2d\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u6269\u5bb9\u6570\u7ec4\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528\u66f4\u5927\u7684\u6570\u7ec4\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u590d\u5236\u65e7\u6570\u7ec4\u5143\u7d20\uff0c\u65e7\u6570\u7ec4\u6307\u5411\u65b0\u6570\u7ec4\u3002\u4f7f\u7528arraylist\uff1a\u521b\u5efa\u53ef\u53d8\u957f\u5ea6arraylist\uff0c\u6dfb\u52a0\u65e7\u6570\u7ec4\u5143\u7d20\u3002\u4f7f\u7528system.arraycopy\uff1a\u590d\u5236\u6570\u7ec4\u5143\u7d20\u5230\u76ee\u6807\u6570\u7ec4\uff0c\u76ee\u6807\u6570\u7ec4\u66f4\u5927\u3002 Java\u4e2d\u6269\u5bb9\u6570\u7ec4 Java\u4e2d\uff0c\u6570\u7ec4\u7684\u5927\u5c0f\u5728\u521b\u5efa\u540e\u662f\u56fa\u5b9a\u7684\u3002\u5982\u679c\u9700\u8981\u6269\u5bb9\u6570\u7ec4\u4ee5\u5bb9\u7eb3\u66f4\u591a\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a \u4f7f\u7528\u66f4\u5927\u7684\u6570\u7ec4 \u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\uff0c\u5c06\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u7136\u540e\u5c06\u73b0\u6709\u6570\u7ec4\u6307\u5411\u65b0\u6570\u7ec4\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] oldArray = {1, 2, 3}; int[] newArray = new int[5]; \/\/ \u5c06\u65e7\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4 for (int i = 0; i &lt; oldArray.length; i++) { newArray[i] = oldArray[i]; } \/\/ \u6307\u5411\u65b0\u6570\u7ec4 oldArray = newArray; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528ArrayList ArrayList\u662f\u4e00\u79cd\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u81ea\u52a8\u6269\u5bb9\u3002\u521b\u5efa\u4e00\u4e2aArrayList\uff0c\u7136\u540e\u6dfb\u52a0\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002 ArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;(); \/\/ \u6dfb\u52a0\u65e7\u6570\u7ec4\u4e2d\u7684\u5143\u7d20 for (int element : oldArray) { list.add(element); [&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-37643","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37643","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=37643"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37643\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37643"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37643"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37643"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}