Java循环打印平行四边形

package practice;

import java.util.Scanner;

public class Parallelogram {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		System.out.print("请输入平行四边形行数：");
		int lines = sc.nextInt();
		System.out.println();
		for (int i = 1; i <= lines; i++) {

			for (int j = 0; j < i; j++) {
				System.out.print(" ");
			}

			for (int j = 0; j < 20; j++) {
				System.out.print("*");
			}

			System.out.println();
		}

		sc.close();

	}

}