打印阵列

package studyJava;

public class Main
{
    public static  void trsp(int n){
        if(n == 0)
            return;
        int sum = (n + n*(n-1)/2)*2;
        int count = n;
        int low = 1;
        int high = sum + 1 - count;
        int highstr = high;
        int flagcount;
        StringBuilder strb = new StringBuilder();
        for(int i=0; i<n; i++){
            flagcount = i*2;
            if(flagcount != 0){
                for(int f=0; f<flagcount; f++){
                    strb.append("-");
                }
            }
            for(int ll = 0; ll < count; ll++){
                strb.append(String.valueOf(low++)).append("*");
            }
            for(int hh = 0; hh < count-1; hh++){
                strb.append(String.valueOf(high++)).append("*");
            }
            strb.append(String.valueOf(high++));
            strb.append("
");
            count--;
            high = highstr - count;
            highstr = high;
        }
        System.out.println(strb.toString());
    }
    public static void main(String args[]){
        trsp(4);
    }
}

结果：

1*2*3*4*17*18*19*20
--5*6*7*14*15*16
----8*9*12*13
------10*11