import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); for(int i = 1; i <= 9; i++){ for(int j = 1; j <= i; j++){ System.out.printf("%d*%d=%2d ",j, i, j *i); } System.out.println(); } } }利用for循环打印,主要就是格式打印。