java 面试每日一题4

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);
    }
}