{"id":64092,"date":"2025-05-03T16:28:16","date_gmt":"2025-05-03T08:28:16","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64092\/"},"modified":"2025-05-03T16:28:16","modified_gmt":"2025-05-03T08:28:16","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e5%90%91%e6%95%b0%e7%bb%84%e4%b8%ad%e6%b7%bb%e5%8a%a0%e5%80%bc-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64092\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c"},"content":{"rendered":"

\n \u5411 java \u6570\u7ec4\u6dfb\u52a0\u503c\u6709\u56db\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u5206\u914d\u503c\uff1b\u4f7f\u7528 arrays.fill() \u586b\u5145\u6574\u4e2a\u6570\u7ec4\uff1b\u4f7f\u7528 java 8 stream api\uff1b\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 apache commons lang \u6216 google guava\uff09\u4e2d\u7684\u65b9\u6cd5\u3002\n<\/p><\/blockquote>\n

\"java\u4e2d\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\u63d2\u56fe\"<\/p>\n

Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\uff1a<\/p>\n

1. \u4f7f\u7528\u6570\u7ec4\u7d22\u5f15<\/strong><\/p>\n

int[] arr = new int[5];\n\n\/\/ \u5411\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u503c\narr[0] = 10;\n\n\/\/ \u5411\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u503c\narr[arr.length - 1] = 20;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2. \u4f7f\u7528 Arrays.fill()<\/strong><\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
Arrays.fill() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a\u6307\u5b9a\u503c\uff1a<\/p>\n
int[] arr = new int[5];\n\n\/\/ \u5c06\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a 10\nArrays.fill(arr, 10);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
3. \u4f7f\u7528 Java 8 \u7684 Stream API<\/strong><\/p>\n
Java 8 \u4e2d\u7684 Stream API \u63d0\u4f9b\u4e86\u66f4\u7b80\u6d01\u7684\u65b9\u5f0f\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\uff1a<\/p>\n
int[] arr = new int[]{1, 2, 3};\n\n\/\/ \u4f7f\u7528\u6d41\u6dfb\u52a0\u503c\narr = Stream.concat(Arrays.stream(arr), Stream.of(4, 5)).toArray();<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
4. \u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<\/strong><\/p>\n
\u5b58\u5728\u4e00\u4e9b\u7b2c\u4e09\u65b9\u5e93\u53ef\u4ee5\u7b80\u5316\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\u7684\u8fc7\u7a0b\uff0c\u4f8b\u5982\uff1a<\/p>\n
    \n
  • Apache Commons Lang \u7684 ArrayUtils.add() \u65b9\u6cd5<\/li>\n
  • Google Guava \u7684 Lists.newArrayList() \u65b9\u6cd5<\/li>\n<\/ul>\n
    \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5f53\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\u65f6\uff0c\u9700\u8981\u786e\u4fdd\u6570\u7ec4\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u5bb9\u7eb3\u65b0\u503c\uff0c\u5426\u5219\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u7ec4\u8d8a\u754c\u9519\u8bef\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5411 java \u6570\u7ec4\u6dfb\u52a0\u503c\u6709\u56db\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u5206\u914d\u503c\uff1b\u4f7f\u7528 arrays.fill() \u586b\u5145\u6574\u4e2a\u6570\u7ec4\uff1b\u4f7f\u7528 java 8 stream api\uff1b\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 apache commons lang \u6216 google guava\uff09\u4e2d\u7684\u65b9\u6cd5\u3002 Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c \u5728 Java \u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\uff1a 1. \u4f7f\u7528\u6570\u7ec4\u7d22\u5f15 int[] arr = new int[5]; \/\/ \u5411\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u503c arr[0] = 10; \/\/ \u5411\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u503c arr[arr.length – 1] = 20; \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 Arrays.fill() \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b Arrays.fill() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a\u6307\u5b9a\u503c\uff1a int[] arr = new int[5]; \/\/ \u5c06\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u586b\u5145\u4e3a 10 Arrays.fill(arr, […]<\/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-64092","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64092","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=64092"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64092\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64092"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64092"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64092"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}