java生成不重复的随机数

import java.util.*;
public class Test...{
public static void main(String[] args)...{
//生成 [0-n) 个不重复的随机数
//list 用来保存这些随机数
ArrayList list = new ArrayList();

int n = 10;
Random rand = new Random();
boolean[] bool = new boolean
;

int num =0;

for (int i = 0; i