输出等腰三角形

public class Three {

    public static void main(String[] args) {
        System.out.println("输入行高");
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        for (int i = 1; i <= n; i++) {
            for (int k = n - i - 1; k >= 0; k--) {
                System.out.print(" ");
            }
            for (int j = 1; j <= 2 * i - 1; j++) {
                System.out.print(2 * i - 1);
            }

            System.out.println();
        }

    }