{"id":64540,"date":"2025-05-03T11:29:17","date_gmt":"2025-05-03T03:29:17","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64540\/"},"modified":"2025-05-03T11:29:17","modified_gmt":"2025-05-03T03:29:17","slug":"java%e4%b8%ad%e6%95%b0%e7%bb%84%e9%87%8c%e9%9d%a2%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64540\/","title":{"rendered":"java\u4e2d\u6570\u7ec4\u91cc\u9762\u600e\u4e48\u6dfb\u52a0\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u7684\u957f\u5ea6\u5c5e\u6027\uff0c\u9002\u7528\u4e8e\u672a\u521d\u59cb\u5316\u6216\u957f\u5ea6\u672a\u6307\u5b9a\u7684\u6570\u7ec4\u3002\u4f7f\u7528 collections.addall() \u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5df2\u521d\u59cb\u5316\u7684\u6570\u7ec4\uff0c\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u6570\u7ec4\u548c\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u4f8b\u5982 list \u6216 set\uff09\uff0c\u5c06\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6240\u6709\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/04\/2024110400093737290.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u6570\u7ec4\u91cc\u9762\u600e\u4e48\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\" alt=\"java\u4e2d\u6570\u7ec4\u91cc\u9762\u600e\u4e48\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u96c6\u5408\u3002\u6570\u7ec4\u5177\u6709\u56fa\u5b9a\u7684\u957f\u5ea6\uff0c\u5e76\u4e14\u5143\u7d20\u662f\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u7684\u3002\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u53ef\u4ee5\u5728 Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n<p><strong>\u4f7f\u7528\u6570\u7ec4\u7684\u957f\u5ea6\u5c5e\u6027<\/strong><\/p>\n<p>\u6b64\u65b9\u6cd5\u9002\u7528\u4e8e\u672a\u521d\u59cb\u5316\u6216\u5177\u6709\u672a\u6307\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u6570\u7ec4\u7684 length \u5c5e\u6027\u6765\u83b7\u53d6\u5f53\u524d\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u7136\u540e\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230 length \u7d22\u5f15\u5904\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] arr = new int[5]; \/\/ \u521d\u59cb\u5316\u4e00\u4e2a\u957f\u5ea6\u4e3a 5 \u7684\u6570\u7ec4\n\n\/\/ \u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\narr[arr.length] = 10;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Collections.addAll() \u65b9\u6cd5<\/strong><\/p>\n<p>\u6b64\u65b9\u6cd5\u9002\u7528\u4e8e\u5df2\u521d\u59cb\u5316\u7684\u6570\u7ec4\u3002Collections.addAll() \u65b9\u6cd5\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a\u4e00\u4e2a\u6570\u7ec4\u548c\u4e00\u4e2a\uff08\u4f8b\u5982 List \u6216 Set\uff09\u3002\u8be5\u65b9\u6cd5\u5c06\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6240\u6709\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002<\/p>\n<pre>int[] arr = {1, 2, 3}; \/\/ \u521d\u59cb\u5316\u4e00\u4e2a\u6570\u7ec4\n\n\/\/ \u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\nList&lt;Integer&gt; elements = Arrays.asList(4, 5, 6);\nCollections.addAll(arr, elements);\n\n\/\/ \u6570\u7ec4\u7684\u65b0\u957f\u5ea6\u4e3a 6\nSystem.out.println(arr.length);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e00\u65e6\u6570\u7ec4\u521b\u5efa\uff0c\u5176\u957f\u5ea6\u5c31\u4e0d\u53ef\u66f4\u6539\u3002\u56e0\u6b64\uff0c\u5728\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u4e4b\u524d\uff0c\u5fc5\u987b\u786e\u4fdd\u6570\u7ec4\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u6570\u7ec4\u91cc\u9762\u600e\u4e48\u6dfb\u52a0\u5143\u7d20\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\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u7684\u957f\u5ea6\u5c5e\u6027\uff0c\u9002\u7528\u4e8e\u672a\u521d\u59cb\u5316\u6216\u957f\u5ea6\u672a\u6307\u5b9a\u7684\u6570\u7ec4\u3002\u4f7f\u7528 collections.addall() \u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5df2\u521d\u59cb\u5316\u7684\u6570\u7ec4\uff0c\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u6570\u7ec4\u548c\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u4f8b\u5982 list \u6216 set\uff09\uff0c\u5c06\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6240\u6709\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002 Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u96c6\u5408\u3002\u6570\u7ec4\u5177\u6709\u56fa\u5b9a\u7684\u957f\u5ea6\uff0c\u5e76\u4e14\u5143\u7d20\u662f\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u7684\u3002\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u53ef\u4ee5\u5728 Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a \u4f7f\u7528\u6570\u7ec4\u7684\u957f\u5ea6\u5c5e\u6027 \u6b64\u65b9\u6cd5\u9002\u7528\u4e8e\u672a\u521d\u59cb\u5316\u6216\u5177\u6709\u672a\u6307\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u6570\u7ec4\u7684 length \u5c5e\u6027\u6765\u83b7\u53d6\u5f53\u524d\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u7136\u540e\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230 length \u7d22\u5f15\u5904\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] arr = new int[5]; \/\/ \u521d\u59cb\u5316\u4e00\u4e2a\u957f\u5ea6\u4e3a 5 \u7684\u6570\u7ec4 \/\/ \u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20 arr[arr.length] = 10; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Collections.addAll() \u65b9\u6cd5 \u6b64\u65b9\u6cd5\u9002\u7528\u4e8e\u5df2\u521d\u59cb\u5316\u7684\u6570\u7ec4\u3002Collections.addAll() \u65b9\u6cd5\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a\u4e00\u4e2a\u6570\u7ec4\u548c\u4e00\u4e2a\uff08\u4f8b\u5982 List \u6216 Set\uff09\u3002\u8be5\u65b9\u6cd5\u5c06\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u7684\u6240\u6709\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002 int[] arr = {1, 2, 3}; \/\/ \u521d\u59cb\u5316\u4e00\u4e2a\u6570\u7ec4 \/\/ \u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20 [&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-64540","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64540","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=64540"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64540\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}