{"id":65465,"date":"2025-05-03T10:14:02","date_gmt":"2025-05-03T02:14:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65465\/"},"modified":"2025-05-03T10:14:02","modified_gmt":"2025-05-03T02:14:02","slug":"java%e4%b8%ad%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%8e%bb%e9%87%8d-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65465\/","title":{"rendered":"java\u4e2d\u6570\u7ec4\u600e\u4e48\u53bb\u91cd"},"content":{"rendered":"

\n java \u4e2d\u6570\u7ec4\u53bb\u91cd\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5b9e\u73b0\uff1a\u4f7f\u7528 hashset\uff0c\u901a\u8fc7\u6dfb\u52a0\u5143\u7d20\u5230\u96c6\u5408\u4e2d\u5b9e\u73b0\u53bb\u91cd\uff0c\u7136\u540e\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\u4f7f\u7528 set() \u65b9\u6cd5\uff08jdk 11 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff0c\u76f4\u63a5\u83b7\u53d6\u6570\u7ec4\u4e2d\u552f\u4e00\u503c\u7684\u4e0d\u53ef\u53d8\u6570\u7ec4\u3002\u4f7f\u7528 list \u548c hashset\uff0c\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a list\uff0c\u6dfb\u52a0\u5230 hashset \u4e2d\u6d88\u9664\u91cd\u590d\u9879\uff0c\u518d\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java\u4e2d\u6570\u7ec4\u600e\u4e48\u53bb\u91cd\u63d2\u56fe\"<\/p>\n

Java \u4e2d\u6570\u7ec4\u53bb\u91cd<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u53bb\u91cd\u662f\u6307\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u91cd\u590d\u5143\u7d20\uff0c\u53ea\u4fdd\u7559\u552f\u4e00\u503c\u3002\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\uff0c\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

\u4f7f\u7528 HashSet<\/strong><\/p>\n

HashSet \u662f\u4e00\u79cd\u96c6\u5408\u6846\u67b6\uff0c\u5b83\u5b58\u50a8\u552f\u4e00\u503c\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\u901a\u8fc7 HashSet \u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\uff1a<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

import java.util.HashSet;\nimport java.util.Arrays;\n\npublic class ArrayDeduplication {\n\n    public static void main(String[] args) {\n        int[] arr = {1, 2, 3, 4, 2, 5, 1};\n        System.out.println(\"\u539f\u59cb\u6570\u7ec4\uff1a\" + Arrays.toString(arr));\n\n        \/\/ \u521b\u5efa HashSet \u5e76\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230\u5176\u4e2d\n        HashSet<Integer> set = new HashSet<>();\n        for (int num : arr) {\n            set.add(num);\n        }\n\n        \/\/ \u5c06 HashSet \u8f6c\u6362\u56de\u6570\u7ec4\n        int[] deduplicatedArray = new int[set.size()];\n        int index = 0;\n        for (int num : set) {\n            deduplicatedArray[index++] = num;\n        }\n\n        System.out.println(\"\u53bb\u91cd\u540e\u7684\u6570\u7ec4\uff1a\" + Arrays.toString(deduplicatedArray));\n    }\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 Set() \u65b9\u6cd5<\/strong><\/p>\n
JDK 11 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\u5f15\u5165\u4e86 Set() \u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u5bf9\u6570\u7ec4\u8fdb\u884c\u53bb\u91cd\u3002\u6b64\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u6570\u7ec4\u6240\u6709\u552f\u4e00\u503c\u7684\u4e0d\u53ef\u53d8\u6570\u7ec4\u3002<\/p>\n
import java.util.Arrays;\n\npublic class ArrayDeduplication {\n\n    public static void main(String[] args) {\n        int[] arr = {1, 2, 3, 4, 2, 5, 1};\n        System.out.println(\"\u539f\u59cb\u6570\u7ec4\uff1a\" + Arrays.toString(arr));\n\n        \/\/ \u4f7f\u7528 Set() \u65b9\u6cd5\u53bb\u91cd\u6570\u7ec4\n        int[] deduplicatedArray = Arrays.stream(arr).distinct().toArray();\n\n        System.out.println(\"\u53bb\u91cd\u540e\u7684\u6570\u7ec4\uff1a\" + Arrays.toString(deduplicatedArray));\n    }\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528 List + HashSet<\/strong><\/p>\n
\u5982\u679c\u65e0\u6cd5\u4f7f\u7528 HashSet \u6216 Set() \u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n
    \n
  1. \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a List<\/li>\n
  2. \u5c06 List \u6dfb\u52a0\u5230 HashSet \u4ee5\u5220\u9664\u91cd\u590d\u9879<\/li>\n
  3. \u5c06 HashSet \u8f6c\u6362\u56de\u6570\u7ec4<\/li>\n<\/ol>\n
    import java.util.Arrays;\nimport java.util.HashSet;\nimport java.util.List;\n\npublic class ArrayDeduplication {\n\n    public static void main(String[] args) {\n        int[] arr = {1, 2, 3, 4, 2, 5, 1};\n        System.out.println(\"\u539f\u59cb\u6570\u7ec4\uff1a\" + Arrays.toString(arr));\n\n        \/\/ \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a List\n        List<Integer> list = Arrays.stream(arr).boxed().toList();\n\n        \/\/ \u5c06 List \u6dfb\u52a0\u5230 HashSet \u4ee5\u5220\u9664\u91cd\u590d\u9879\n        HashSet<Integer> set = new HashSet<>(list);\n\n        \/\/ \u5c06 HashSet \u8f6c\u6362\u56de\u6570\u7ec4\n        int[] deduplicatedArray = new int[set.size()];\n        int index = 0;\n        for (int num : set) {\n            deduplicatedArray[index++] = num;\n        }\n\n        System.out.println(\"\u53bb\u91cd\u540e\u7684\u6570\u7ec4\uff1a\" + Arrays.toString(deduplicatedArray));\n    }\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u6570\u7ec4\u600e\u4e48\u53bb\u91cd\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    java \u4e2d\u6570\u7ec4\u53bb\u91cd\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5b9e\u73b0\uff1a\u4f7f\u7528 hashset\uff0c\u901a\u8fc7\u6dfb\u52a0\u5143\u7d20\u5230\u96c6\u5408\u4e2d\u5b9e\u73b0\u53bb\u91cd\uff0c\u7136\u540e\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\u4f7f\u7528 set() \u65b9\u6cd5\uff08jdk 11 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff0c\u76f4\u63a5\u83b7\u53d6\u6570\u7ec4\u4e2d\u552f\u4e00\u503c\u7684\u4e0d\u53ef\u53d8\u6570\u7ec4\u3002\u4f7f\u7528 list \u548c hashset\uff0c\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a list\uff0c\u6dfb\u52a0\u5230 hashset \u4e2d\u6d88\u9664\u91cd\u590d\u9879\uff0c\u518d\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002 Java \u4e2d\u6570\u7ec4\u53bb\u91cd \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u53bb\u91cd\u662f\u6307\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u91cd\u590d\u5143\u7d20\uff0c\u53ea\u4fdd\u7559\u552f\u4e00\u503c\u3002\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\uff0c\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u3002 \u4f7f\u7528 HashSet HashSet \u662f\u4e00\u79cd\u96c6\u5408\u6846\u67b6\uff0c\u5b83\u5b58\u50a8\u552f\u4e00\u503c\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\u901a\u8fc7 HashSet \u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b import java.util.HashSet; import java.util.Arrays; public class ArrayDeduplication { public static void main(String[] args) { int[] arr = {1, 2, 3, 4, 2, 5, 1}; System.out.println(“\u539f\u59cb\u6570\u7ec4\uff1a” + Arrays.toString(arr)); \/\/ \u521b\u5efa HashSet […]<\/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-65465","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65465","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=65465"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65465\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}