java生成六位的随机数 java生成七位随机数

本段代码是生成的六位随机数。也可修改生成任意位随机数。

int[] array = {0,1,2,3,4,5,6,7,8,9};


Random rand = new Random();


for (int i = 10; i > 1; i--) {


int index = rand.nextInt(i);


int tmp = array[index];


array[index] = array[i - 1];


array[i - 1] = tmp;

}

int result = 0;


for(int i = 0; i < 6; i++)


result = result * 10 + array[i];

System.out.println(result);