java tree from star

1public static void main(String[] args) {
2
3        for (int i = 0; i < 10; i++) {
4            for (int j = 0; j < 10 - i; j++)
5                System.out.print(" ");
6            for (int k = 0; k < (2 * i + 1); k++)
7                System.out.print("*");
8            System.out.println();
9        }
10    }