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);