{"id":94062,"date":"2026-08-13T16:16:45","date_gmt":"2026-08-13T08:16:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/94062.html"},"modified":"2026-08-13T16:16:45","modified_gmt":"2026-08-13T08:16:45","slug":"collections-%e5%b7%a5%e5%85%b7%e7%b1%bb%e5%b8%b8%e7%94%a8%e6%96%b9%e6%b3%95%e5%85%a8%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/94062.html","title":{"rendered":"Collections \u5de5\u5177\u7c7b\u5e38\u7528\u65b9\u6cd5\u5168\u89e3"},"content":{"rendered":"<\/p>\n

import java.util.Collections;<\/p>\n

\u2460 sort(List list)<\/p>\n

\u7528\u6cd5： \u5bf9\u5217\u8868\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f（\u81ea\u7136\u6392\u5e8f）\u3002\u5217\u8868\u5143\u7d20\u5fc5\u987b\u5b9e\u73b0 Comparable \u63a5\u53e3\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(3);
\nlist.add(1);
\nlist.add(4);
\nlist.add(2);
\nCollections.sort(list);
\n\/\/ \u5217\u8868\u72b6\u6001: [1, 2, 3, 4]
\nSystem.out.println(list); \/\/ [1, 2, 3, 4]<\/p>\n

\u2461 sort(List list, Comparator<? super T> c)<\/p>\n

\u7528\u6cd5： \u6839\u636e\u6307\u5b9a\u6bd4\u8f83\u5668\u5bf9\u5217\u8868\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n

List<String> list = new ArrayList<>();
\nlist.add("banana");
\nlist.add("apple");
\nlist.add("cherry");
\nCollections.sort(list, Comparator.reverseOrder());
\n\/\/ \u5217\u8868\u72b6\u6001: [cherry, banana, apple]（\u964d\u5e8f）
\nSystem.out.println(list); \/\/ [cherry, banana, apple]<\/p>\n

\/\/ \u6309\u5b57\u7b26\u4e32\u957f\u5ea6\u6392\u5e8f
\nCollections.sort(list, (a, b) -> a.length() – b.length());
\n\/\/ \u5217\u8868\u72b6\u6001: [apple, banana, cherry]（\u6309\u957f\u5ea6\u5347\u5e8f）
\nSystem.out.println(list); \/\/ [apple, banana, cherry]<\/p>\n

\u2462 reverse(List<?> list)<\/p>\n

\u7528\u6cd5： \u53cd\u8f6c\u5217\u8868\u4e2d\u5143\u7d20\u7684\u987a\u5e8f\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nlist.add(3);
\nlist.add(4);
\nCollections.reverse(list);
\n\/\/ \u5217\u8868\u72b6\u6001: [4, 3, 2, 1]
\nSystem.out.println(list); \/\/ [4, 3, 2, 1]<\/p>\n

\u2463 shuffle(List<?> list)<\/p>\n

\u7528\u6cd5： \u968f\u673a\u6253\u4e71\u5217\u8868\u4e2d\u5143\u7d20\u7684\u987a\u5e8f（\u4f7f\u7528\u9ed8\u8ba4\u968f\u673a\u6e90）\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nlist.add(3);
\nlist.add(4);
\nCollections.shuffle(list);
\n\/\/ \u5217\u8868\u72b6\u6001: \u6bcf\u6b21\u7ed3\u679c\u4e0d\u540c，\u5982 [2, 4, 1, 3]
\nSystem.out.println(list); \/\/ \u53ef\u80fd\u662f [2, 4, 1, 3]<\/p>\n

\u2464 shuffle(List<?> list, Random rnd)<\/p>\n

\u7528\u6cd5： \u4f7f\u7528\u6307\u5b9a\u7684\u968f\u673a\u6e90\u968f\u673a\u6253\u4e71\u5217\u8868\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nlist.add(3);
\nlist.add(4);
\nRandom random = new Random(123); \/\/ \u56fa\u5b9a\u79cd\u5b50，\u6bcf\u6b21\u7ed3\u679c\u76f8\u540c
\nCollections.shuffle(list, random);
\n\/\/ \u5217\u8868\u72b6\u6001: [3, 4, 2, 1]（\u56fa\u5b9a\u79cd\u5b50\u4fdd\u8bc1\u53ef\u91cd\u73b0）
\nSystem.out.println(list); \/\/ [3, 4, 2, 1]<\/p>\n

\u2465 swap(List<?> list, int i, int j)<\/p>\n

\u7528\u6cd5： \u4ea4\u6362\u5217\u8868\u4e2d\u6307\u5b9a\u4f4d\u7f6e\u7684\u4e24\u4e2a\u5143\u7d20\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nlist.add(3);
\nlist.add(4);
\nCollections.swap(list, 0, 3);
\n\/\/ \u5217\u8868\u72b6\u6001: [4, 2, 3, 1]（\u4ea4\u6362\u7d22\u5f150\u548c3）
\nSystem.out.println(list); \/\/ [4, 2, 3, 1]<\/p>\n

\u2466 binarySearch(List<? extends Comparable<? super T>> list, T key)<\/p>\n

\u7528\u6cd5： \u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u6cd5\u5728\u5df2\u6392\u5e8f\u7684\u5217\u8868\u4e2d\u67e5\u627e\u6307\u5b9a\u5143\u7d20\u3002\u8fd4\u56de\u7d22\u5f15，\u82e5\u627e\u4e0d\u5230\u8fd4\u56de -(\u63d2\u5165\u70b9) – 1\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(3);
\nlist.add(5);
\nlist.add(7);
\nlist.add(9);
\n\/\/ \u5fc5\u987b\u63d0\u524d\u6392\u5e8f！
\nCollections.sort(list); \/\/ [1, 3, 5, 7, 9]<\/p>\n

int index = Collections.binarySearch(list, 5);
\n\/\/ \u8fd4\u56de 2（\u7d22\u5f15\u4f4d\u7f6e）
\nSystem.out.println(index); \/\/ 2<\/p>\n

int notFound = Collections.binarySearch(list, 6);
\n\/\/ \u8fd4\u56de -4（\u63d2\u5165\u70b9\u7d22\u5f153，\u6240\u4ee5 -(3) – 1 = -4）
\nSystem.out.println(notFound); \/\/ -4<\/p>\n

\u2467 max(Collection<? extends T> coll)<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u96c6\u5408\u4e2d\u7684\u6700\u5927\u5143\u7d20（\u6839\u636e\u81ea\u7136\u6392\u5e8f）\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(3);
\nlist.add(7);
\nlist.add(1);
\nlist.add(9);
\nInteger max = Collections.max(list);
\n\/\/ \u8fd4\u56de 9
\nSystem.out.println(max); \/\/ 9<\/p>\n

\u2468 max(Collection<? extends T> coll, Comparator<? super T> comp)<\/p>\n

\u7528\u6cd5： \u6839\u636e\u6307\u5b9a\u6bd4\u8f83\u5668\u8fd4\u56de\u96c6\u5408\u4e2d\u7684\u6700\u5927\u5143\u7d20\u3002<\/p>\n

List<String> list = new ArrayList<>();
\nlist.add("apple");
\nlist.add("banana");
\nlist.add("cherry");
\n\/\/ \u6309\u5b57\u7b26\u4e32\u957f\u5ea6\u627e\u6700\u5927
\nString max = Collections.max(list, (a, b) -> a.length() – b.length());
\n\/\/ \u8fd4\u56de "banana" \u6216 "cherry"（\u957f\u5ea6\u90fd\u662f6，\u8fd4\u56de\u7b2c\u4e00\u4e2a）
\nSystem.out.println(max); \/\/ banana<\/p>\n

\u2469 min(Collection<? extends T> coll)<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u96c6\u5408\u4e2d\u7684\u6700\u5c0f\u5143\u7d20（\u6839\u636e\u81ea\u7136\u6392\u5e8f）\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(3);
\nlist.add(7);
\nlist.add(1);
\nlist.add(9);
\nInteger min = Collections.min(list);
\n\/\/ \u8fd4\u56de 1
\nSystem.out.println(min); \/\/ 1<\/p>\n

\u246a frequency(Collection<?> c, Object o)<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u6307\u5b9a\u5143\u7d20\u5728\u96c6\u5408\u4e2d\u51fa\u73b0\u7684\u6b21\u6570\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nlist.add(1);
\nlist.add(3);
\nlist.add(1);
\nint count = Collections.frequency(list, 1);
\n\/\/ \u8fd4\u56de 3（1\u51fa\u73b0\u4e863\u6b21）
\nSystem.out.println(count); \/\/ 3<\/p>\n

\u246b fill(List<? super T> list, T obj)<\/p>\n

\u7528\u6cd5： \u7528\u6307\u5b9a\u5143\u7d20\u66ff\u6362\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nlist.add(3);
\nCollections.fill(list, 99);
\n\/\/ \u5217\u8868\u72b6\u6001: [99, 99, 99]
\nSystem.out.println(list); \/\/ [99, 99, 99]<\/p>\n

\u246c copy(List<? super T> dest, List<? extends T> src)<\/p>\n

\u7528\u6cd5： \u5c06\u6e90\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\u590d\u5236\u5230\u76ee\u6807\u5217\u8868\u3002\u76ee\u6807\u5217\u8868\u957f\u5ea6\u5fc5\u987b >= \u6e90\u5217\u8868\u3002<\/p>\n

List<Integer> src = new ArrayList<>();
\nsrc.add(1);
\nsrc.add(2);
\nsrc.add(3);<\/p>\n

List<Integer> dest = new ArrayList<>();
\ndest.add(0);
\ndest.add(0);
\ndest.add(0);
\ndest.add(0);
\ndest.add(0);<\/p>\n

Collections.copy(dest, src);
\n\/\/ \u5217\u8868\u72b6\u6001: [1, 2, 3, 0, 0]（\u524d3\u4e2a\u88ab\u66ff\u6362）
\nSystem.out.println(dest); \/\/ [1, 2, 3, 0, 0]<\/p>\n

\u246d addAll(Collection<? super T> c, T… elements)<\/p>\n

\u7528\u6cd5： \u5c06\u6240\u6709\u6307\u5b9a\u5143\u7d20\u6dfb\u52a0\u5230\u96c6\u5408\u4e2d\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nCollections.addAll(list, 3, 4, 5);
\n\/\/ \u5217\u8868\u72b6\u6001: [1, 2, 3, 4, 5]
\nSystem.out.println(list); \/\/ [1, 2, 3, 4, 5]<\/p>\n

\u246e replaceAll(List list, T oldVal, T newVal)<\/p>\n

\u7528\u6cd5： \u5c06\u5217\u8868\u4e2d\u6240\u6709\u51fa\u73b0\u7684\u65e7\u503c\u66ff\u6362\u4e3a\u65b0\u503c\u3002<\/p>\n

List<String> list = new ArrayList<>();
\nlist.add("apple");
\nlist.add("banana");
\nlist.add("apple");
\nlist.add("cherry");
\nCollections.replaceAll(list, "apple", "orange");
\n\/\/ \u5217\u8868\u72b6\u6001: [orange, banana, orange, cherry]
\nSystem.out.println(list); \/\/ [orange, banana, orange, cherry]<\/p>\n

\u246f rotate(List<?> list, int distance)<\/p>\n

\u7528\u6cd5： \u5c06\u5217\u8868\u4e2d\u7684\u5143\u7d20\u5faa\u73af\u79fb\u52a8\u6307\u5b9a\u8ddd\u79bb\u3002\u6b63\u6570\u5411\u53f3\u79fb，\u8d1f\u6570\u5411\u5de6\u79fb\u3002<\/p>\n

List<Integer> list = new ArrayList<>();
\nlist.add(1);
\nlist.add(2);
\nlist.add(3);
\nlist.add(4);
\nlist.add(5);<\/p>\n

Collections.rotate(list, 2); \/\/ \u5411\u53f3\u79fb2\u4f4d
\n\/\/ \u5217\u8868\u72b6\u6001: [4, 5, 1, 2, 3]
\nSystem.out.println(list); \/\/ [4, 5, 1, 2, 3]<\/p>\n

Collections.rotate(list, -1); \/\/ \u5411\u5de6\u79fb1\u4f4d
\n\/\/ \u5217\u8868\u72b6\u6001: [5, 1, 2, 3, 4]
\nSystem.out.println(list); \/\/ [5, 1, 2, 3, 4]<\/p>\n

\u2470 disjoint(Collection c1, Collection c2)<\/p>\n

\u7528\u6cd5： \u5224\u65ad\u4e24\u4e2a\u96c6\u5408\u662f\u5426\u6ca1\u6709\u4ea4\u96c6\u3002\u6ca1\u6709\u4ea4\u96c6\u8fd4\u56de true，\u6709\u4ea4\u96c6\u8fd4\u56de false\u3002<\/p>\n

List<Integer> list1 = new ArrayList<>();
\nlist1.add(1);
\nlist1.add(2);
\nlist1.add(3);<\/p>\n

List<Integer> list2 = new ArrayList<>();
\nlist2.add(4);
\nlist2.add(5);
\nlist2.add(6);<\/p>\n

List<Integer> list3 = new ArrayList<>();
\nlist3.add(3);
\nlist3.add(4);
\nlist3.add(5);<\/p>\n

boolean disjoint1 = Collections.disjoint(list1, list2);
\n\/\/ \u8fd4\u56de true（\u6ca1\u6709\u4ea4\u96c6）
\nSystem.out.println(disjoint1); \/\/ true<\/p>\n

boolean disjoint2 = Collections.disjoint(list1, list3);
\n\/\/ \u8fd4\u56de false（\u6709\u4ea4\u96c6：3）
\nSystem.out.println(disjoint2); \/\/ false<\/p>\n

\u2471 emptyList() \/ emptySet() \/ emptyMap()<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u4e00\u4e2a\u7a7a\u7684\u4e0d\u53ef\u53d8\u96c6\u5408\u3002\u5e38\u7528\u4e8e\u907f\u514d\u8fd4\u56de null\u3002<\/p>\n

\/\/ \u8fd4\u56de\u7a7a\u7684\u4e0d\u53ef\u53d8List
\nList<String> emptyList = Collections.emptyList();
\n\/\/ emptyList.add("a"); \/\/ \u274c \u629b\u51fa UnsupportedOperationException
\nSystem.out.println(emptyList); \/\/ []<\/p>\n

\/\/ \u8fd4\u56de\u7a7a\u7684\u4e0d\u53ef\u53d8Set
\nSet<Integer> emptySet = Collections.emptySet();<\/p>\n

\/\/ \u8fd4\u56de\u7a7a\u7684\u4e0d\u53ef\u53d8Map
\nMap<String, String> emptyMap = Collections.emptyMap();<\/p>\n

\u2472 singletonList(T o) \/ singleton(T o) \/ singletonMap(K key, V value)<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u53ea\u5305\u542b\u4e00\u4e2a\u5143\u7d20\u7684\u4e0d\u53ef\u53d8\u96c6\u5408\u3002<\/p>\n

\/\/ \u5355\u5143\u7d20List
\nList<String> singleList = Collections.singletonList("hello");
\n\/\/ singleList.add("world"); \/\/ \u274c \u629b\u51fa UnsupportedOperationException
\nSystem.out.println(singleList); \/\/ [hello]<\/p>\n

\/\/ \u5355\u5143\u7d20Set
\nSet<Integer> singleSet = Collections.singleton(100);<\/p>\n

\/\/ \u5355\u5143\u7d20Map
\nMap<String, Integer> singleMap = Collections.singletonMap("key", 123);
\nSystem.out.println(singleMap); \/\/ {key=123}<\/p>\n

\u2473 unmodifiableList(List<? extends T> list) \/ unmodifiableSet() \/ unmodifiableMap()<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u6307\u5b9a\u96c6\u5408\u7684\u4e0d\u53ef\u4fee\u6539\u89c6\u56fe\u3002\u4efb\u4f55\u4fee\u6539\u64cd\u4f5c\u90fd\u4f1a\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n

List<Integer> original = new ArrayList<>();
\noriginal.add(1);
\noriginal.add(2);
\noriginal.add(3);<\/p>\n

List<Integer> unmodifiable = Collections.unmodifiableList(original);
\nSystem.out.println(unmodifiable); \/\/ [1, 2, 3]<\/p>\n

\/\/ unmodifiable.add(4); \/\/ \u274c \u629b\u51fa UnsupportedOperationException<\/p>\n

\/\/ \u4f46\u539f\u96c6\u5408\u6539\u53d8\u4f1a\u5f71\u54cd\u4e0d\u53ef\u4fee\u6539\u89c6\u56fe
\noriginal.add(4);
\nSystem.out.println(unmodifiable); \/\/ [1, 2, 3, 4]（\u89c6\u56fe\u4e5f\u53d8\u4e86）<\/p>\n

\u3251 synchronizedList(List list) \/ synchronizedSet() \/ synchronizedMap()<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u7ebf\u7a0b\u5b89\u5168\u7684\u96c6\u5408\u3002\u6240\u6709\u65b9\u6cd5\u90fd\u88ab\u540c\u6b65\u4fdd\u62a4\u3002<\/p>\n

\/\/ \u666e\u901aList\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684
\nList<String> list = new ArrayList<>();<\/p>\n

\/\/ \u8f6c\u4e3a\u7ebf\u7a0b\u5b89\u5168\u7684List
\nList<String> syncList = Collections.synchronizedList(list);<\/p>\n

\/\/ \u540c\u6837\u9002\u7528\u4e8eSet\u548cMap
\nSet<String> syncSet = Collections.synchronizedSet(new HashSet<>());
\nMap<String, String> syncMap = Collections.synchronizedMap(new HashMap<>());<\/p>\n

\/\/ \u6ce8\u610f：\u8fed\u4ee3\u65f6\u9700\u8981\u624b\u52a8\u540c\u6b65
\nsynchronized (syncList) {
\n for (String s : syncList) {
\n System.out.println(s);
\n }
\n}<\/p>\n

\u3252 nCopies(int n, T o)<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u7531 n \u4e2a\u76f8\u540c\u5143\u7d20\u7ec4\u6210\u7684\u4e0d\u53ef\u53d8\u5217\u8868\u3002<\/p>\n

List<Integer> list = Collections.nCopies(5, 10);
\n\/\/ \u5217\u8868\u72b6\u6001: [10, 10, 10, 10, 10]
\nSystem.out.println(list); \/\/ [10, 10, 10, 10, 10]
\n\/\/ list.add(20); \/\/ \u274c \u629b\u51fa UnsupportedOperationException<\/p>\n

\u3253 enumeration(Collection c)<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u96c6\u5408\u7684\u65e7\u7248\u8fed\u4ee3\u5668 Enumeration\u3002<\/p>\n

List<String> list = new ArrayList<>();
\nlist.add("a");
\nlist.add("b");
\nlist.add("c");<\/p>\n

Enumeration<String> enumeration = Collections.enumeration(list);
\nwhile (enumeration.hasMoreElements()) {
\n System.out.println(enumeration.nextElement());
\n}
\n\/\/ \u8f93\u51fa:
\n\/\/ a
\n\/\/ b
\n\/\/ c<\/p>\n

\u3254 list(Enumeration e)<\/p>\n

\u7528\u6cd5： \u5c06 Enumeration \u8f6c\u6362\u4e3a ArrayList\u3002<\/p>\n

Vector<String> vector = new Vector<>();
\nvector.add("x");
\nvector.add("y");
\nvector.add("z");<\/p>\n

Enumeration<String> enumObj = vector.elements();
\nList<String> list = Collections.list(enumObj);
\n\/\/ \u5217\u8868\u72b6\u6001: [x, y, z]
\nSystem.out.println(list); \/\/ [x, y, z]<\/p>\n

\u3255 checkedList(List list, Class type) \/ checkedSet() \/ checkedMap()<\/p>\n

\u7528\u6cd5： \u8fd4\u56de\u7c7b\u578b\u5b89\u5168\u7684\u96c6\u5408，\u5728\u8fd0\u884c\u65f6\u68c0\u67e5\u6dfb\u52a0\u7684\u5143\u7d20\u7c7b\u578b\u3002<\/p>\n

\/\/ \u666e\u901aList\u53ef\u4ee5\u6df7\u5165\u4e0d\u540c\u7c7b\u578b
\nList rawList = new ArrayList();
\nrawList.add("hello");
\nrawList.add(123); \/\/ \u53ef\u4ee5\u6df7\u5165<\/p>\n

\/\/ \u7c7b\u578b\u5b89\u5168\u7684List
\nList<String> safeList = Collections.checkedList(
\n new ArrayList<>(),
\n String.class
\n);
\nsafeList.add("hello");
\n\/\/ safeList.add(123); \/\/ \u274c \u629b\u51fa ClassCastException<\/p>\n

\u5feb\u901f\u53c2\u8003\u8868<\/p>\n\n\u65b9\u6cd5\u4f5c\u7528\u793a\u4f8b<\/tr>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
sort()<\/td>\n\u5347\u5e8f\u6392\u5e8f<\/td>\nCollections.sort(list)<\/td>\n<\/tr>\n
reverse()<\/td>\n\u53cd\u8f6c\u987a\u5e8f<\/td>\nCollections.reverse(list)<\/td>\n<\/tr>\n
shuffle()<\/td>\n\u968f\u673a\u6253\u4e71<\/td>\nCollections.shuffle(list)<\/td>\n<\/tr>\n
swap()<\/td>\n\u4ea4\u6362\u5143\u7d20<\/td>\nCollections.swap(list, 0, 1)<\/td>\n<\/tr>\n
binarySearch()<\/td>\n\u4e8c\u5206\u67e5\u627e<\/td>\nCollections.binarySearch(list, key)<\/td>\n<\/tr>\n
max()\/min()<\/td>\n\u6700\u5927\/\u6700\u5c0f\u503c<\/td>\nCollections.max(list)<\/td>\n<\/tr>\n
frequency()<\/td>\n\u51fa\u73b0\u6b21\u6570<\/td>\nCollections.frequency(list, obj)<\/td>\n<\/tr>\n
fill()<\/td>\n\u586b\u5145\u5143\u7d20<\/td>\nCollections.fill(list, 99)<\/td>\n<\/tr>\n
copy()<\/td>\n\u590d\u5236\u5217\u8868<\/td>\nCollections.copy(dest, src)<\/td>\n<\/tr>\n
addAll()<\/td>\n\u6279\u91cf\u6dfb\u52a0<\/td>\nCollections.addAll(list, 1,2,3)<\/td>\n<\/tr>\n
replaceAll()<\/td>\n\u66ff\u6362\u5143\u7d20<\/td>\nCollections.replaceAll(list, old, new)<\/td>\n<\/tr>\n
rotate()<\/td>\n\u5faa\u73af\u79fb\u52a8<\/td>\nCollections.rotate(list, 2)<\/td>\n<\/tr>\n
disjoint()<\/td>\n\u5224\u65ad\u65e0\u4ea4\u96c6<\/td>\nCollections.disjoint(list1, list2)<\/td>\n<\/tr>\n
emptyList()<\/td>\n\u7a7a\u5217\u8868<\/td>\nCollections.emptyList()<\/td>\n<\/tr>\n
singletonList()<\/td>\n\u5355\u5143\u7d20\u5217\u8868<\/td>\nCollections.singletonList(obj)<\/td>\n<\/tr>\n
nCopies()<\/td>\nn\u4e2a\u91cd\u590d\u5143\u7d20<\/td>\nCollections.nCopies(5, 10)<\/td>\n<\/tr>\n
unmodifiableList()<\/td>\n\u4e0d\u53ef\u53d8\u5217\u8868<\/td>\nCollections.unmodifiableList(list)<\/td>\n<\/tr>\n
synchronizedList()<\/td>\n\u7ebf\u7a0b\u5b89\u5168\u5217\u8868<\/td>\nCollections.synchronizedList(list)<\/td>\n<\/tr>\n
checkedList()<\/td>\n\u7c7b\u578b\u5b89\u5168\u5217\u8868<\/td>\nCollections.checkedList(list, String.class)<\/td>\n<\/tr>\n
enumeration()<\/td>\n\u8f6c\u4e3aEnumeration<\/td>\nCollections.enumeration(list)<\/td>\n<\/tr>\n
list()<\/td>\nEnumeration\u8f6cList<\/td>\nCollections.list(enumeration)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

import java.util.Collections;\u2460 sort(List list)\u7528\u6cd5： \u5bf9\u5217\u8868\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f（\u81ea\u7136\u6392\u5e8f）\u3002\u5217\u8868\u5143\u7d20\u5fc5\u987b\u5b9e\u73b0 Comparable \u63a5\u53e3\u3002List list new ArrayList();
\nlist.add(3);
\nlist.add(1);
\nlist.add(4);
\nlist.add(2);
\nCollections.sort(list);
\n\/\/ \u5217\u8868\u72b6\u6001: [1, 2,<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10187,149],"topic":[],"class_list":["post-94062","post","type-post","status-publish","format-standard","hentry","category-server","tag-codingplan","tag-windows"],"yoast_head":"\nCollections \u5de5\u5177\u7c7b\u5e38\u7528\u65b9\u6cd5\u5168\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/94062.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Collections \u5de5\u5177\u7c7b\u5e38\u7528\u65b9\u6cd5\u5168\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"import java.util.Collections;\u2460 sort(List list)\u7528\u6cd5： \u5bf9\u5217\u8868\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f（\u81ea\u7136\u6392\u5e8f）\u3002\u5217\u8868\u5143\u7d20\u5fc5\u987b\u5b9e\u73b0 Comparable \u63a5\u53e3\u3002List list new ArrayList(); list.add(3); list.add(1); list.add(4); list.add(2); Collections.sort(list); \/\/ \u5217\u8868\u72b6\u6001: [1, 2,\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/94062.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-13T08:16:45+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/94062.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/94062.html\",\"name\":\"Collections \u5de5\u5177\u7c7b\u5e38\u7528\u65b9\u6cd5\u5168\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-08-13T08:16:45+00:00\",\"dateModified\":\"2026-08-13T08:16:45+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/94062.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/94062.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/94062.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Collections \u5de5\u5177\u7c7b\u5e38\u7528\u65b9\u6cd5\u5168\u89e3\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Collections \u5de5\u5177\u7c7b\u5e38\u7528\u65b9\u6cd5\u5168\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/94062.html","og_locale":"zh_CN","og_type":"article","og_title":"Collections \u5de5\u5177\u7c7b\u5e38\u7528\u65b9\u6cd5\u5168\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"import java.util.Collections;\u2460 sort(List list)\u7528\u6cd5： \u5bf9\u5217\u8868\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f（\u81ea\u7136\u6392\u5e8f）\u3002\u5217\u8868\u5143\u7d20\u5fc5\u987b\u5b9e\u73b0 Comparable \u63a5\u53e3\u3002List list new ArrayList(); 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