用Java语言打印等腰三角形

输入等腰三角形的高即行数，用“”*”打印出等腰三角形

public class TestDemo {
    public static void main(String[] args) {
        //打印三角形 5行
//方法一
//        for (int i=1; i<=5; i++){
//            for (int j=5; j>=i; j--){
//                System.out.print(" ");
//            }
//            for (int j=1; j<=i; j++){
//                System.out.print("*");
//            }
//            for (int j=1; j<i; j++){
//                System.out.print("*");
//            }
//            System.out.println();
//        }
 
//方法二
        Scanner scanner = new Scanner(System.in);
        System.out.println("输入等腰三角形的高：");
        int n = scanner.nextInt();
 
        System.out.println("等腰三角形效果如下：");
        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++){
                System.out.print("*");
            }
            System.out.println();
        }
 
    }
}