由0组成的菱形

[java]代码库

   public static void main(String[] args) {
        System.out.println("这是一个由^v组成的菱形:");

        int num = 8;
        for (int i = 1; i <= num; i++) {
            for (int m = 1; m <= num - i; m++) {
                System.out.print(" ");
            }
            for (int j = 1; j <= i * 2 - 1; j++) {
                System.out.print("0");
            }
            System.out.println();
        }

        for (int i = num - 1; i >= 1; i--) {
            for (int j = 1; j <= num - i; j++) {
                System.out.print(" ");
            }
            for (int k = 1; k <= 2 * i - 1; k++) {
                System.out.print("0");
            }
            System.out.println();
        }
        System.out.println("结束运行！");
    }
}

[代码运行效果截图]