{"id":66890,"date":"2025-05-03T10:21:38","date_gmt":"2025-05-03T02:21:38","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66890\/"},"modified":"2025-05-03T10:21:38","modified_gmt":"2025-05-03T02:21:38","slug":"java%e4%b8%ad%e7%9a%84%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66890\/","title":{"rendered":"java\u4e2d\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u7c7b\u578b\uff1a\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\uff08=\uff09\u6dfb\u52a0\u57fa\u672c\u6570\u636e\u7c7b\u578b\u3002\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u5e76\u5206\u914d\u5bf9\u8c61\u5f15\u7528\u7ed9\u5bf9\u8c61\u6570\u7ec4\u3002\u4f7f\u7528 arrays.fill() \u65b9\u6cd5\u586b\u5145\u6240\u6709\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u4ece\u53e6\u4e00\u4e2a\u6570\u7ec4\u590d\u5236\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111717331870919.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u6570\u636e\u7c7b\u578b\u63d2\u56fe\" alt=\"java\u4e2d\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u6570\u636e\u7c7b\u578b\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u7c7b\u578b<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u56fa\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u7c7b\u578b\u7684\u65b9\u5f0f\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\u3002<\/p>\n<p><strong>1. \u57fa\u672c\u6570\u636e\u7c7b\u578b\u6570\u7ec4\uff08int\u3001float\u3001double \u7b49\uff09<\/strong><\/p>\n<p>\u5bf9\u4e8e\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26 (=) \u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] numbers = {1, 2, 3};\nnumbers[3] = 4; \/\/ \u6dfb\u52a0\u5143\u7d20 4 \u5230\u6570\u7ec4\u7d22\u5f15 3 \u5904<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u5bf9\u8c61\u6570\u7ec4\uff08\u5f15\u7528\u7c7b\u578b\uff09<\/strong><\/p>\n<p>\u5bf9\u4e8e\u5bf9\u8c61\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u65b0\u5bf9\u8c61\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u6570\u7ec4\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>String[] names = {\"John\", \"Mary\"};\nnames[2] = new String(\"Bob\"); \/\/ \u6dfb\u52a0\u5bf9\u8c61 \"Bob\" \u5230\u6570\u7ec4\u7d22\u5f15 2 \u5904<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528 Arrays.fill() \u65b9\u6cd5<\/strong><\/p>\n<p>Arrays.fill() \u65b9\u6cd5\u7528\u4e8e\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a\u6307\u5b9a\u7684\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] numbers = new int[5];\nArrays.fill(numbers, 10); \/\/ \u5c06\u6570\u7ec4 numbers \u4e2d\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a 10<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5<\/strong><\/p>\n<p>System.arraycopy() \u65b9\u6cd5\u7528\u4e8e\u5c06\u4e00\u4e2a\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] numbers1 = {1, 2, 3};\nint[] numbers2 = new int[5];\nSystem.arraycopy(numbers1, 0, numbers2, 3, 2); \/\/ \u6570\u7ec4 numbers1 \u7684\u5143\u7d20 0 \u548c 1 \u590d\u5236\u5230\u6570\u7ec4 numbers2 \u7684\u7d22\u5f15 3 \u548c 4<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u7684\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u6570\u636e\u7c7b\u578b\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 \u4e2d\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u7c7b\u578b\uff1a\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\uff08=\uff09\u6dfb\u52a0\u57fa\u672c\u6570\u636e\u7c7b\u578b\u3002\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u5e76\u5206\u914d\u5bf9\u8c61\u5f15\u7528\u7ed9\u5bf9\u8c61\u6570\u7ec4\u3002\u4f7f\u7528 arrays.fill() \u65b9\u6cd5\u586b\u5145\u6240\u6709\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u4ece\u53e6\u4e00\u4e2a\u6570\u7ec4\u590d\u5236\u5143\u7d20\u3002 Java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u7c7b\u578b \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u56fa\u5b9a\u6570\u91cf\u7684\u5143\u7d20\u3002\u5411\u6570\u7ec4\u6dfb\u52a0\u6570\u636e\u7c7b\u578b\u7684\u65b9\u5f0f\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\u3002 1. \u57fa\u672c\u6570\u636e\u7c7b\u578b\u6570\u7ec4\uff08int\u3001float\u3001double \u7b49\uff09 \u5bf9\u4e8e\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26 (=) \u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u3002\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] numbers = {1, 2, 3}; numbers[3] = 4; \/\/ \u6dfb\u52a0\u5143\u7d20 4 \u5230\u6570\u7ec4\u7d22\u5f15 3 \u5904 \u767b\u5f55\u540e\u590d\u5236 2. \u5bf9\u8c61\u6570\u7ec4\uff08\u5f15\u7528\u7c7b\u578b\uff09 \u5bf9\u4e8e\u5bf9\u8c61\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u65b0\u5bf9\u8c61\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u6570\u7ec4\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff1a String[] names = {&#8220;John&#8221;, &#8220;Mary&#8221;}; names[2] = new String(&#8220;Bob&#8221;); \/\/ \u6dfb\u52a0\u5bf9\u8c61 &#8220;Bob&#8221; \u5230\u6570\u7ec4\u7d22\u5f15 2 [&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-66890","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66890","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=66890"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66890\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}