package com.student.test2;

class users
{
    public static int getUserid()
    {
        return 1;
    }
}

public class Ansewer23
{
    public  int getid(int s)
    {
        return s = users.getUserid();
    }    
}

------解决方案--------------------
把这个包import进来呗

------解决方案--------------------
import 或者隔包调用~