public class Nine { public static void main(String[] args) { //外层循环控制行数 for (int i = 9;i >=1;i--){ //内层循环控制列 j<=I for (int j = 9; j >= i;j--){ System.out.print(i + "*" + j + "=" +(i * j)+"\t"); } System.out.println(); } }}