利用程序输出如下图形:

*

* * *

* * * * *

* * * * * * *

* * * * *

* * *

*

class Asterisk {
	public static void main(String[] args) {
		for (int i = 1; i <= 13; i += 2) {
			for (int j = 1; j <= i && i + j <= 14; j++) {
				System.out.print("* ");
			}
			System.out.println(); // 换行
		}
	}
}