小白不知道这个程序哪里出问题了报错说：为找不到符号？

abstract class Employee
{
    private String name;
    private String id;
    private double pay;
    Employee(String name,String id,double pay)
    {
      this.name=name;
        this.id=id;
        this.pay=pay;   
    }
   
    public abstract void work();
   
}
class Manager extends Employee
{
    private int bonus;
    Manager(String name,String id,double pay,int bonus)
    {
        super(name,id,pay);
        this.bonus=bonus;
    }
    public void work()
    {
        System.out.println("Manager work");
    }
}
class ProfessionalEmployee extends Employee
{
    ProfessionalEmployee(String name,String id,double pay)
    {
        super(name,id,pay);
    }
    public void work()
    {
        System.out.println("Professional work");
    }
}
class AbstractDemo
{
    public static void main(String[] args)
    {
        ProfessionalEmployee s=new ProfessionalEmployee(kuke,xxoodx,50000);
        s.work();
    }   
}