set和list转换_list和set

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);
}
}