生成指定范围不重复的随机数

题目:生成1-10范围中任意5个随机数。

方法一:不使用容器

package com.study.pratice03;

import java.util.Random;

public class MyRandom
{

    public static void main(String[] args)
    {
        // TODO Auto-generated method stub
        int[] randArray = new int[5];
        int randInt = 0;// 产生的随机数
        int count = 0;// 产生合格随机数的个数
        boolean flag = false;// 标记产生的随机数是否重复
        Random rand = new Random();
        while (count < 5)
        {
            randInt = rand.nextInt(11);
            for (int i = 0; i < count; i++)
            {
                if (randArray[i] == randInt)
                {
                    flag = true;
                    break;
                }
                else
                {
                    flag = false;
                }
            }
            if (!flag && randInt != 0)
            {
                randArray[count++] = randInt;
            }
        }
        for (int x : randArray)
            System.out.println(x);

    }

}

方法二:使用容器

package com.study.pratice03;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class SetRandom
{

    public static void main(String[] args)
    {
        // TODO Auto-generated method stub
        List<Integer> list = new ArrayList<Integer>();
        Random rd = new Random();
        int count = 0;
        while (count < 5)
        {
            int randInt = rd.nextInt(11);
            if (randInt != 0 && !list.contains(randInt))
            {
                list.add(randInt);
                count++;
            }
        }
        for (Integer inte : list)
            System.out.println(inte);
    }
}