数组训练。数组日常训练

Question

2。定义一个二维数组4x7的二维数组
观察下面数据，将数据填充进去，然后
遍历数组
ABCDEFG
BABCDEF
CBABCDE
DCBABCD

Answer 1

public class A {
    public static void main(String[] args) {
        char[][] arr = new char[4][7];
        for(int i = 0;i < 4;i++){
            if(i == 0){
                for(int j = 0;j < 7;j++){
                    arr[i][j] = (char)('A' + j);
                }
            }else{
                for(int j = 0;j < 7;j++){
                    if(j == 0){
                        arr[i][j] = (char)(arr[i-1][j] + 1);
                    }else{
                        arr[i][j] = arr[i-1][j-1];
                    }
                }
            }
        }
        for(int i = 0;i < 4;i++){
            for(int j = 0;j < 7;j++){
                System.out.print(arr[i][j] + " ");
            }
            System.out.println();
        }
    }

}