Java递归求n的阶乘n！

public class Test3 {
	public static void main(String[] args) {		
		System.out.println(""+jieCheng(10));
	}
public static int jieCheng(int n) {
	if (n == -1) {
		return -1;
	}else if(n == 1){
		return 1;
	}else {
		return jieCheng(n-1)*n;
	}
}
}