{"id":37762,"date":"2024-11-26T16:27:15","date_gmt":"2024-11-26T08:27:15","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37762\/"},"modified":"2024-11-26T16:27:15","modified_gmt":"2024-11-26T08:27:15","slug":"java%e7%9a%84%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e5%86%85%e5%ae%b9","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37762\/","title":{"rendered":"java\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u5185\u5bb9"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5185\u5bb9\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u590d\u5236\u73b0\u6709\u5143\u7d20\uff0c\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528\u53ef\u53d8\u5927\u5c0f\u7684 arraylist \u7c7b\uff0c\u6dfb\u52a0\u5143\u7d20\uff0c\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111310102693335.jpg\" class=\"aligncenter\" title=\"java\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u5185\u5bb9\u63d2\u56fe\" alt=\"java\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u5185\u5bb9\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5185\u5bb9<\/strong><\/p>\n<p><strong>\u65b9\u6cd5\uff1a<\/strong><\/p>\n<p>Java \u4e2d\u6709\u4e24\u79cd\u5411\u6570\u7ec4\u6dfb\u52a0\u5185\u5bb9\u7684\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u7136\u540e\u590d\u5236\u73b0\u6709\u5143\u7d20<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>\u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u6bd4\u73b0\u6709\u6570\u7ec4\u5927\u7684\u65b0\u6570\u7ec4\u3002<\/li>\n<li>\u4f7f\u7528 arraycopy() \u65b9\u6cd5\u5c06\u73b0\u6709\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002<\/li>\n<li>\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u672b\u5c3e\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>int[] oldArray = {1, 2, 3};\nint[] newArray = new int[oldArray.length + 1];\n\nSystem.arraycopy(oldArray, 0, newArray, 0, oldArray.length);\nnewArray[oldArray.length] = 4;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 ArrayList \u7c7b<\/strong><\/p>\n<ul>\n<li>\u521b\u5efa\u4e00\u4e2a ArrayList\uff0c\u5b83\u662f\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684\u52a8\u6001\u6570\u7ec4\u3002<\/li>\n<li>\u4f7f\u7528 add() \u65b9\u6cd5\u5411\u5176\u6dfb\u52a0\u5143\u7d20\u3002<\/li>\n<li>\u8f6c\u6362\u4e3a\u6570\u7ec4\u65f6\uff0c\u4f7f\u7528 toArray() \u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>List&lt;Integer&gt; arrayList = new ArrayList&lt;&gt;();\narrayList.add(1);\narrayList.add(2);\narrayList.add(3);\narrayList.add(4);\n\nint[] newArray = arrayList.toArray(new int[arrayList.size()]);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n<ul>\n<li>\u5f53\u4f7f\u7528\u7b2c\u4e00\u79cd\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u786e\u4fdd\u65b0\u6570\u7ec4\u7684\u5927\u5c0f\u8db3\u591f\u5927\u3002<\/li>\n<li>\u4f7f\u7528 ArrayList \u7c7b\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u7075\u6d3b\u6027\uff0c\u4f46\u6027\u80fd\u53ef\u80fd\u4e0d\u5982\u539f\u751f\u6570\u7ec4\u3002<\/li>\n<li>Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u4fee\u6539\u5176\u4e2d\u7684\u5143\u7d20\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u5185\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\u5411\u6570\u7ec4\u6dfb\u52a0\u5185\u5bb9\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u590d\u5236\u73b0\u6709\u5143\u7d20\uff0c\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528\u53ef\u53d8\u5927\u5c0f\u7684 arraylist \u7c7b\uff0c\u6dfb\u52a0\u5143\u7d20\uff0c\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002 \u5982\u4f55\u5728 Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5185\u5bb9 \u65b9\u6cd5\uff1a Java \u4e2d\u6709\u4e24\u79cd\u5411\u6570\u7ec4\u6dfb\u52a0\u5185\u5bb9\u7684\u65b9\u6cd5\uff1a 1. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u7136\u540e\u590d\u5236\u73b0\u6709\u5143\u7d20 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u6bd4\u73b0\u6709\u6570\u7ec4\u5927\u7684\u65b0\u6570\u7ec4\u3002 \u4f7f\u7528 arraycopy() \u65b9\u6cd5\u5c06\u73b0\u6709\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002 \u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u672b\u5c3e\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a int[] oldArray = {1, 2, 3}; int[] newArray = new int[oldArray.length + 1]; System.arraycopy(oldArray, 0, newArray, 0, oldArray.length); newArray[oldArray.length] = 4; \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 ArrayList \u7c7b \u521b\u5efa\u4e00\u4e2a ArrayList\uff0c\u5b83\u662f\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684\u52a8\u6001\u6570\u7ec4\u3002 \u4f7f\u7528 add() \u65b9\u6cd5\u5411\u5176\u6dfb\u52a0\u5143\u7d20\u3002 \u8f6c\u6362\u4e3a\u6570\u7ec4\u65f6\uff0c\u4f7f\u7528 toArray() \u65b9\u6cd5\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a List&lt;Integer&gt; [&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-37762","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37762","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=37762"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37762\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}