怎么样输出倒三角形..

public class Triangle {
public static void main(String[] args) {
int n = 5;
int n1 = n / 2;
// triangle
for (int i = n - 1; i >= 0; i--)
line(n - i, 2 * i + 1);

System.out.println("----------------------");
// lingxing
for (int i = 0; i < n1; i++)
line(1 + n1 - i, 2 * i + 1);
line(0, n);
for (int i = n1 - 1; i >= 0; i--)
line(1 + n1 - i, 2 * i + 1);
}

public static void line(int start, int len) {
for (int j = 0; j < start - 1; j++)
System.out.print(" ");
for (int j = 0; j < len; j++)
System.out.print("*");
System.out.println();
}
}

用一个两层for循环即可，一个for循环控制行，一个for循环控制列