java输出一个空心三角形A

以下是Java输出一个空心三角形A的代码：

public class Main {
    public static void main(String[] args) {
        int n = 5;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n - i; j++) {
                System.out.print(" ");
            }
            for (int j = 1; j <= 2 * i - 1; j++) {
                if (j == 1 || j == 2 * i - 1 || i == n) {
                    System.out.print("A");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }
}

输出结果为：

    A
   A A
  A   A
 A     A
AAAAAAAAA