Java基础练习-字母图形

import java.util.Scanner;public class Main{    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int n  = sc.nextInt();        int m = sc.nextInt();        for(int i = 0; i<n;i++)        {            for(int j = 0; j< m;j++)            {                char a = (char) (Math.abs(i-j)+'A');                System.out.print(a);            }            System.out.println();        }        System.out.println();    }}