package set;import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.Vector;public class ReverseLinkedHashSet {public static void main(String args[]){testSetConvertList();testListConvertSet();}static void testSetConvertList(){Set<Integer> hashSet = new HashSet<Integer>();Set<Integer> linkedHashSet = new LinkedHashSet<Integer>();for(int i=1 ;i<20;i++){hashSet.add(i);linkedHashSet.add(i);}System.out.println("hashSet: "+hashSet);System.out.println("linkedHashSet: "+linkedHashSet);List<Integer> hashSetList = new ArrayList<Integer>(hashSet);List<Integer> linkedHashSetList = new ArrayList<Integer>(linkedHashSet);System.out.println("hashSet转list集合： "+hashSetList);System.out.println("linkedHashSet转list集合： "+linkedHashSetList);Collections.reverse(linkedHashSetList);System.out.println("反转排序linkedHashSetList集合： "+linkedHashSetList);}@SuppressWarnings("serial")static void testListConvertSet(){List<Integer> vector = new Vector<Integer>();List<Integer> linkedList = new LinkedList<Integer>();List<Integer> dataList1 = new LinkedList<Integer>(){{add(1);add(2);add(2);add(4);add(5);}};List<Integer> dataList2 = new LinkedList<Integer>(){{add(7);add(6);add(16);add(17);add(18);add(19);add(19);}};List<Integer> dataList3 = new LinkedList<Integer>(){{add(11);add(12);add(13);add(14);add(15);}};vector.addAll(dataList1);vector.addAll(dataList2);vector.addAll(dataList3);linkedList.addAll(dataList1);linkedList.addAll(dataList2);linkedList.addAll(dataList3);System.out.println("vector: "+vector);System.out.println("linkedList: "+linkedList);Collections.sort(vector);System.out.println("排序vector: "+vector);Collections.shuffle(vector);System.out.println("随机排序vector: "+vector);Collections.sort(vector);System.out.println("排序vector: "+vector);Collections.reverse(vector);System.out.println("反转排序vector: "+vector);Set<Integer> hashSet = new HashSet<Integer>(linkedList);Set<Integer> linkedSet = new LinkedHashSet<Integer>(linkedList);System.out.println("hashSet: "+hashSet);System.out.println("linkedSet: "+linkedSet);}
}