hashset treeset

package week02;

import java.util.*;

public class 明明的随机数 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int m = sc.nextInt();

Set hashSet = new HashSet<>();
int []arr=new int [m];
for(int j = 0; j < m; j ++)
{
arr[j] = sc.nextInt();
}
for(int i = 0; i < arr.length; i++)
{
hashSet.add(arr[i]);
}
System.out.println(hashSet.size());

TreeSet treeSet = new TreeSet();

treeSet.addAll(hashSet);

}
}
上一篇:集合训练4


下一篇:TreeSet的定制排序 [Java]