{"id":65374,"date":"2025-05-03T10:33:59","date_gmt":"2025-05-03T02:33:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65374\/"},"modified":"2025-05-03T10:33:59","modified_gmt":"2025-05-03T02:33:59","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e4%b8%8d%e9%99%90%e5%88%b6-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65374\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u4e0d\u9650\u5236"},"content":{"rendered":"<blockquote><p>\n  java \u6570\u7ec4\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u53d6\u6d88\u5927\u5c0f\u9650\u5236\uff1a\u4f7f\u7528\u96c6\u5408\u7c7b\uff08\u5982 arraylist\uff09\u63d0\u4f9b\u52a8\u6001\u5927\u5c0f\u8c03\u6574\uff1b\u4f7f\u7528 varargs \u65b9\u6cd5\u521b\u5efa\u53ef\u53d8\u5927\u5c0f\u6570\u7ec4\uff1b\u4f7f\u7528\u53cd\u5c04\u52a8\u6001\u4fee\u6539\u6570\u7ec4\u5927\u5c0f\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/12\/2024111222220034780.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u600e\u4e48\u4e0d\u9650\u5236\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u600e\u4e48\u4e0d\u9650\u5236\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u6570\u7ec4\u5982\u4f55\u53d6\u6d88\u9650\u5236<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>Java \u6570\u7ec4\u9ed8\u8ba4\u5177\u6709\u56fa\u5b9a\u5927\u5c0f\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u3002\u7136\u800c\uff0c\u6709\u5404\u79cd\u65b9\u6cd5\u53ef\u4ee5\u53d6\u6d88\u5bf9 Java \u6570\u7ec4\u5927\u5c0f\u7684\u9650\u5236\u3002<\/p>\n<p><strong>\u65b9\u6cd5<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u96c6\u5408\u7c7b<\/strong><\/li>\n<\/ul>\n<p>\u96c6\u5408\u7c7b\uff0c\u5982 ArrayList \u548c LinkedList\uff0c\u5141\u8bb8\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u3002\u5b83\u4eec\u53ef\u4ee5\u968f\u7740\u6570\u636e\u7684\u6dfb\u52a0\u6216\u5220\u9664\u800c\u589e\u957f\u6216\u7f29\u5c0f\u3002<\/p>\n<pre>import java.util.ArrayList;\n\npublic class UnboundedArray {\n\n    public static void main(String[] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u65e0\u754c\u6570\u7ec4\n        ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\n\n        \/\/ \u6dfb\u52a0\u5143\u7d20\n        numbers.add(1);\n        numbers.add(2);\n\n        \/\/ \u8f93\u51fa\u6570\u7ec4\u5185\u5bb9\n        System.out.println(numbers);\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li><strong>\u4f7f\u7528 varargs<\/strong><\/li>\n<\/ul>\n<p>\u53ef\u53d8\u53c2\u6570 (varargs) \u65b9\u6cd5\u5141\u8bb8\u5c06\u53ef\u53d8\u6570\u91cf\u7684\u53c2\u6570\u4f20\u9012\u7ed9\u65b9\u6cd5\u3002\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u6570\u7ec4\u6765\u4fdd\u5b58\u8fd9\u4e9b\u53c2\u6570\u3002<\/p>\n<pre>public static void printNumbers(int... numbers) {\n    for (int number : numbers) {\n        System.out.println(number);\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u53cd\u5c04<\/strong><\/li>\n<\/ul>\n<p>\u53cd\u5c04\u5141\u8bb8\u60a8\u52a8\u6001\u5730\u68c0\u67e5\u548c\u4fee\u6539\u7c7b\u7684\u5c5e\u6027\u3002\u5b83\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u73b0\u6709\u6570\u7ec4\u7684\u5f15\u7528\u3002<\/p>\n<pre>import java.lang.reflect.Array;\n\npublic class UnboundedArray {\n\n    public static void main(String[] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u521d\u59cb\u5927\u5c0f\u4e3a 2 \u7684\u6570\u7ec4\n        int[] numbers = new int[2];\n\n        \/\/ \u53cd\u5c04\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u65e0\u754c\u6570\u7ec4\n        int[] unboundedNumbers = (int[]) Array.newInstance(numbers.getClass().getComponentType(), 0);\n\n        \/\/ \u590d\u5236\u5143\u7d20\u5230\u65b0\u6570\u7ec4\n        System.arraycopy(numbers, 0, unboundedNumbers, 0, numbers.length);\n\n        \/\/ \u6dfb\u52a0\u5143\u7d20\u5230\u65e0\u754c\u6570\u7ec4\n        Array.set(unboundedNumbers, 0, 1);\n        Array.set(unboundedNumbers, 1, 2);\n\n        \/\/ \u8f93\u51fa\u6570\u7ec4\u5185\u5bb9\n        for (int number : unboundedNumbers) {\n            System.out.println(number);\n        }\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u4e0d\u9650\u5236\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 \u6570\u7ec4\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u53d6\u6d88\u5927\u5c0f\u9650\u5236\uff1a\u4f7f\u7528\u96c6\u5408\u7c7b\uff08\u5982 arraylist\uff09\u63d0\u4f9b\u52a8\u6001\u5927\u5c0f\u8c03\u6574\uff1b\u4f7f\u7528 varargs \u65b9\u6cd5\u521b\u5efa\u53ef\u53d8\u5927\u5c0f\u6570\u7ec4\uff1b\u4f7f\u7528\u53cd\u5c04\u52a8\u6001\u4fee\u6539\u6570\u7ec4\u5927\u5c0f\u3002 Java \u6570\u7ec4\u5982\u4f55\u53d6\u6d88\u9650\u5236 \u5f15\u8a00 Java \u6570\u7ec4\u9ed8\u8ba4\u5177\u6709\u56fa\u5b9a\u5927\u5c0f\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u3002\u7136\u800c\uff0c\u6709\u5404\u79cd\u65b9\u6cd5\u53ef\u4ee5\u53d6\u6d88\u5bf9 Java \u6570\u7ec4\u5927\u5c0f\u7684\u9650\u5236\u3002 \u65b9\u6cd5 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4f7f\u7528\u96c6\u5408\u7c7b \u96c6\u5408\u7c7b\uff0c\u5982 ArrayList \u548c LinkedList\uff0c\u5141\u8bb8\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u3002\u5b83\u4eec\u53ef\u4ee5\u968f\u7740\u6570\u636e\u7684\u6dfb\u52a0\u6216\u5220\u9664\u800c\u589e\u957f\u6216\u7f29\u5c0f\u3002 import java.util.ArrayList; public class UnboundedArray { public static void main(String[] args) { \/\/ \u521b\u5efa\u4e00\u4e2a\u65e0\u754c\u6570\u7ec4 ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;(); \/\/ \u6dfb\u52a0\u5143\u7d20 numbers.add(1); numbers.add(2); \/\/ \u8f93\u51fa\u6570\u7ec4\u5185\u5bb9 System.out.println(numbers); } } \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 varargs \u53ef\u53d8\u53c2\u6570 (varargs) \u65b9\u6cd5\u5141\u8bb8\u5c06\u53ef\u53d8\u6570\u91cf\u7684\u53c2\u6570\u4f20\u9012\u7ed9\u65b9\u6cd5\u3002\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u6570\u7ec4\u6765\u4fdd\u5b58\u8fd9\u4e9b\u53c2\u6570\u3002 public static [&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-65374","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65374","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=65374"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65374\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}