常数变易法2

public class 常数变易法2 {

    public static void main(String[] args) {
        for (int k = 0; k < 5; k++) {
            for (int i = 0; i < 5 - k; i++)
                System.out.print(" ");
            for (int i = 0; i < k + 1; i++)
                System.out.print((char) ('A' + i));
            for (int i = k - 1; i >= 0; i--)
                System.out.print((char) ('A' + i));
            System.out.println();
        }
    }

}