java算法：1234组成无重复的三位数

public class Wanshu {

public static void main(String[] args) {

int i = 0;

int j = 0;

int k = 0;

int t = 0;

for (i = 1; i <= 4; i++)

for (j = 1; j <= 4; j++)

for (k = 1; k <= 4; k++)

if (i != j && j != k && i != k) {

t += 1;

System.out.println(i * 100 + j * 10 + k);

}

System.out.println(t);

}

}