{"id":64300,"date":"2025-05-03T12:33:23","date_gmt":"2025-05-03T04:33:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64300\/"},"modified":"2025-05-03T12:33:23","modified_gmt":"2025-05-03T04:33:23","slug":"java%e4%b8%ad%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64300\/","title":{"rendered":"Java\u4e2d\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0"},"content":{"rendered":"

\n \u53ef\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5411 java \u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff1a\u76f4\u63a5\u8d4b\u503c\uff1b\u4f7f\u7528\u6570\u7ec4\u5143\u7d20\u7684\u5f15\u7528\uff1b\u8fed\u4ee3\u6dfb\u52a0\uff1b\u4f7f\u7528 streams api\uff1b\u4f7f\u7528 arrays.fill() \u65b9\u6cd5\u3002\n<\/p><\/blockquote>\n

\"Java\u4e2d\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5411 Java \u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n

\u76f4\u63a5\u8d4b\u503c<\/strong><\/p>\n

\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u5728\u5206\u914d\u6570\u7ec4\u7a7a\u95f4\u65f6\u76f4\u63a5\u8bbe\u7f6e\u5143\u7d20\u503c\uff1a<\/p>\n

int[][] arr = new int[2][3];\narr[0][0] = 1;\narr[0][1] = 2;\narr[0][2] = 3;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528\u6570\u7ec4\u5143\u7d20\u7684\u5f15\u7528<\/strong><\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
\u5982\u679c\u4e8c\u7ef4\u6570\u7ec4\u7684\u5143\u7d20\u672c\u8eab\u662f\u5bf9\u8c61\u5f15\u7528\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u5f15\u7528\u6765\u6dfb\u52a0\u65b0\u5143\u7d20\uff1a<\/p>\n
Object[][] arr = new Object[2][3];\nObject obj1 = new Object();\narr[0][0] = obj1;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fed\u4ee3\u6dfb\u52a0<\/strong><\/p>\n
\u5bf9\u4e8e\u5927\u578b\u4e8c\u7ef4\u6570\u7ec4\uff0c\u53ef\u4ee5\u904d\u5386\u884c\u548c\u5217\uff0c\u5e76\u4f7f\u7528\u5d4c\u5957\u5faa\u73af\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n
int[][] arr = new int[20][10];\nfor (int i = 0; i < arr.length; i++) {\n    for (int j = 0; j < arr[i].length; j++) {\n        arr[i][j] = i * j;\n    }\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 Streams API<\/strong><\/p>\n
Java 8 \u5f15\u5165\u4e86 Streams API\uff0c\u5141\u8bb8\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u98ce\u683c\u6765\u5904\u7406\u6570\u636e\u3002\u53ef\u4ee5\u5c06 Streams API \u4e0e\u6570\u7ec4\u76f8\u7ed3\u5408\u6765\u7b80\u6d01\u5730\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n
int[][] arr = new int[2][3];\nIntStream.range(0, 6).forEach(i -> arr[i \/ 3][i % 3] = i);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 Arrays.fill() \u65b9\u6cd5<\/strong><\/p>\n
Arrays.fill() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8bbe\u7f6e\u4e3a\u6307\u5b9a\u503c\u3002\u5bf9\u4e8c\u7ef4\u6570\u7ec4\u4f7f\u7528\u65f6\uff0c\u5b83\u4f1a\u5c06\u6bcf\u4e2a\u884c\u586b\u5145\u4e3a\u8be5\u503c\uff1a<\/p>\n
int[][] arr = new int[2][3];\nArrays.fill(arr[0], 1);\nArrays.fill(arr[1], 2);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4ee5\u4e0a\u5c31\u662fJava\u4e2d\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u6dfb\u52a0\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u53ef\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5411 java \u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff1a\u76f4\u63a5\u8d4b\u503c\uff1b\u4f7f\u7528\u6570\u7ec4\u5143\u7d20\u7684\u5f15\u7528\uff1b\u8fed\u4ee3\u6dfb\u52a0\uff1b\u4f7f\u7528 streams api\uff1b\u4f7f\u7528 arrays.fill() \u65b9\u6cd5\u3002 \u5982\u4f55\u5411 Java \u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20 \u76f4\u63a5\u8d4b\u503c \u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u5728\u5206\u914d\u6570\u7ec4\u7a7a\u95f4\u65f6\u76f4\u63a5\u8bbe\u7f6e\u5143\u7d20\u503c\uff1a int[][] arr = new int[2][3]; arr[0][0] = 1; arr[0][1] = 2; arr[0][2] = 3; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u6570\u7ec4\u5143\u7d20\u7684\u5f15\u7528 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5982\u679c\u4e8c\u7ef4\u6570\u7ec4\u7684\u5143\u7d20\u672c\u8eab\u662f\u5bf9\u8c61\u5f15\u7528\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u5f15\u7528\u6765\u6dfb\u52a0\u65b0\u5143\u7d20\uff1a Object[][] arr = new Object[2][3]; Object obj1 = new Object(); arr[0][0] = obj1; \u767b\u5f55\u540e\u590d\u5236 \u8fed\u4ee3\u6dfb\u52a0 \u5bf9\u4e8e\u5927\u578b\u4e8c\u7ef4\u6570\u7ec4\uff0c\u53ef\u4ee5\u904d\u5386\u884c\u548c\u5217\uff0c\u5e76\u4f7f\u7528\u5d4c\u5957\u5faa\u73af\u6dfb\u52a0\u5143\u7d20\uff1a int[][] arr = new int[20][10]; for (int i = […]<\/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-64300","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64300","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=64300"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64300\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}