public class TestFour {    public static void main(String[] args){        int[] array={1,2,3,4};        int i,j,k,num = 0;        for(i=0;i<4;i++){            for(j=0;j<4;j++){                if(i==j){                    continue;                }                for(k=0;k<4;k++){                    if(k==i||k==j){                    continue;                    }                    System.out.println(array[i]*100+array[j]*10+array[k]*1);                    num++;                                    }            }        }        System.out.println(num);    }}