{"id":225709,"date":"2020-12-10T05:37:45","date_gmt":"2020-12-09T21:37:45","guid":{"rendered":"http:\/\/4563.org\/?p=225709"},"modified":"2020-12-10T05:37:45","modified_gmt":"2020-12-09T21:37:45","slug":"java-%e4%b8%ad-array-%e8%bd%ac-set-%e4%bb%80%e4%b9%88%e5%86%99%e6%b3%95%e6%af%94%e8%be%83%e5%a5%bd%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=225709","title":{"rendered":"Java \u4e2d array \u8f6c set \u4ec0\u4e48\u5199\u6cd5\u6bd4\u8f83\u597d\uff1f"},"content":{"rendered":"
\n
\n
\n

Java \u4e2d array \u8f6c set \u4ec0\u4e48\u5199\u6cd5\u6bd4\u8f83\u597d\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : gzk329 <\/span> <\/i> 6<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n
Set<Integer> set = Stream.of(Arrays.stream(nums).boxed().parallel().toArray(Integer[]::new)).collect(Collectors.toSet());\/\/nums \u4e3a int \u6570\u7ec4 <\/code><\/pre>\n
\u4f7f\u7528\u5e76\u884c\u6d41\u662f\u8fd9\u6837\u561b\uff1f<\/p>\n
Set<Integer> set = new HashSet<>(Arrays.asList(nums));<\/code> \u6216\u8005\u8fd9\u79cd\u5199\u6cd5\u7684\u95ee\u9898\u5728\u54ea\u513f set \u6ca1\u6709\u9488\u5bf9 list \u7684\u6784\u9020\u51fd\u6570\uff1f \u6c42\u6307\u6559<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (12<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ztcaoll222 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 Set.of(someArray);                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : chenset <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 haha ..                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : weixiaoyun <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 guava Sets.newHashSet(nums)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : gzk329 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u989d \u505a\u7b97\u6cd5\u9898\u7684\u65f6\u5019\u7528 \u4e0d\u5bfc\u5165\u522b\u7684 \u5c31 jdk                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : gzk329 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \/**
    226 * Creates a <i>mutable<\/i> {@code HashSet} instance containing the given elements. A very thin
    227 * convenience for creating an empty set and then calling {@link Iterators#addAll}.
    228 *
    229 * <p><b>Note:<\/b> if mutability is not required and the elements are non-null, use {@link
    230 * ImmutableSet#copyOf(Iterator)} instead.
    231 *
    232 * <p><b>Note:<\/b> if {@code E} is an {@link Enum} type, you should create an {@link EnumSet}
    233 * instead.
    234 *
    235 * <p>Overall, this method is not very useful and will likely be deprecated in the future.
    236 *\/
    237 public static <E> HashSet<E> newHashSet(Iterator<? extends E> elements) {
    238 HashSet<E> set = newHashSet();
    239 Iterators.addAll(set, elements);
    240 return set;
    241 }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : yazinnnn <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5f15\u5165 kotlin \u5e93
    java \u5199\u6cd5
    ArraysKt.toSet(arr)<\/p>\n
    kotlin \u5199\u6cd5
    arr.toSet()
    \u6216\u8005
    setOf(*arr)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : xgfan <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7b97\u6cd5\u9898\u91cc\u7528\u2026\u2026
    \u7b97\u6cd5\u9898\u91cc\u5c31\u4e0d\u8be5\u7528\u5230\u8fd9\u79cd\u8f6c\u6362\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : zxCoder <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7b97\u6cd5\u9898 forforfor \u5c31\u597d\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : cheng6563 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5e76\u884c\u88c5\u4e2a\u7bb1\u8fd9\u6709\u5565\u597d\u5e76\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : gzk329 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zxCoder 
    @xgfan \u4e3b\u8981\u662f\u524d\u5929\u505a\u7684\u9898\u76ee \u672c\u6765\u662f\u76f4\u63a5\u6a21\u62df\u7684 forfor \u7528\u4e86 o(N2)\u65f6\u95f4\u590d\u6742\u5ea6 \u7136\u540e\u5c31\u6709 3 \u4e2a\u6570\u636e\u91cf\u5927\u7684\u6d4b\u8bd5\u4f8b\u5b50\u8d85\u65f6
    \u540e\u6765\u60f3\u7684\u662f map \u7b80\u5316 \u7ed3\u679c\u8fd8\u662f\u8d85\u65f6\uff0c\u518d\u540e\u6765\u60f3\u7684\u662f\u7528 set \u5148\u628a\u6570\u7ec4\u53bb\u91cd\uff0c\u8fd9\u4e2a array \u8f6c set \u5c31\u4e00\u76f4\u5199\u4e0d\u597d \u76f4\u63a5 for \u7136\u540e add \u8fdb set \u7684\u8bdd\u80af\u5b9a\u8d85\u65f6\uff0c\u540e\u6765\u5927\u6982\u4e5f\u77e5\u9053\u6211\u8fd9\u4e2a\u601d\u8def\u662f\u6709\u95ee\u9898 \u4f46\u662f\u53c8\u60f3\u628a\u8fd9\u4e2a\u601d\u8def\u5199\u51fa\u6765 \u5c31\u5728\u627e\u76f4\u63a5\u8f6c\u7684 api\uff0c\u8fd9\u79cd\u505a\u6cd5\u65f6\u95f4\u590d\u6742\u5ea6\u5e94\u8be5\u5f97\u5c0f\u4e8e o(N)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : zxCoder <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @gzk329 \u7b97\u6cd5\u590d\u6742\u5ea6\u4e0d\u662f\u8fd9\u6837\u7b97\u7684\u5427\u3002\u3002\u3002\u3002\u5982\u679c\u4f60 for add \u8fdb\u4e5f\u8d85\u65f6\uff0c\u90a3\u65e0\u8bba\u7528\u4ec0\u4e48 api \u8f6c \u590d\u6742\u5ea6\u4e5f\u662f\u4e0d\u5bf9\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : gzk329 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zxCoder \u5bf9\u7684\u554a \u5c31\u662f\u60f3\u901a\u4e86 \u6240\u4ee5\u4e0d\u627e\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    Java \u4e2d array \u8f6c se…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/225709"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=225709"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/225709\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=225709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=225709"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=225709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}