Java-递归执行机制

代码参考如下；

public class test {
    public static void main(String[] args) {
        method fac = new method();
        System.out.println(fac.factorial(3));
    }
}
class method {
    public int factorial(int n) {
        System.out.println(n);
        if (n == 1) {
            return 1;
        }
        else {
            return factorial(n-1) * n;
        }
    }
}