获取指定范围内的不重复随机数

package com.wzs;

import java.util.Arrays;
import java.util.Random;

/**
* 获取指定范围内的不重复随机数
*
* @author wWX154783
*
*/
public class Test
{
public static void main(String[] args)
{
int[] arrIntger = rang(2, 50, 48);
Arrays.sort(arrIntger);// 排序
System.out.println(Arrays.toString(arrIntger));
}

static int[] rang(int startNumber, int endNumber, int count)
{
int total = 0;// 已经生成数据量
boolean flag = false;// 是否重复,true 重复,false 不重复

int[] intArray = new int[count];
Random random = new Random();
int intTemp;// 随机生成的临时数据
if (count > (endNumber - startNumber))
{
System.out.print("生成数据总量不能大于 " + (endNumber - startNumber) + " !");
System.exit(0);
}
while (total < count)
{
intTemp = random.nextInt(endNumber - startNumber + 1) + startNumber;
// 判断是否与生成的数据相等
for (int j = 0; j < total; j++)
{
if (intTemp == intArray[j])
{
flag = true;
break;
}
else
{
flag = false;
}
}
if (false == flag)
{
intArray[total] = intTemp;
total++;
}
}

return intArray;
}
}

输出结果:

[2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50]