金字塔数字排列方法

public class goal {    public static void main(String[] args) {        for (int i = 1; i <10 ; i++) {            for (int j = 0; j <9-i ; j++) {                System.out.print(" ");            }            for (int m=2*i-1; m>0; m--) {                System.out.print(2);            }            System.out.println();        }    }}