java - 不带参数的继承构造函数

Question

我正在尝试创建一个无参数构造函数，它将从用户那里获取所有实例变量的输入(通过 Scanner 类)，但它是从另一个类继承的。

我该怎么做？

这是我所做的:

 public class Manager extends Super_Employee{
     String  manager ;

     /* String GetManger  (){
         return manager ;
     }*/

     Manager (){
        Scanner manager = new Scanner(System.in);
     }

     @Override
     String Print() {
         return ("the manager is : " +manager);
     }

这是父类(super class):

 public  class Super_Employee extends abstract_Employee {

     String Fname ;
     String Lname;
     String address;
     int number;
     Super_Employee(String Fname,String Lname, String address, int number)
    {
        System.out.println("Constructing an Employee");
        this.Fname = Fname ;
        this.Lname = Lname;
        this.address = address;
        this.number = number;
    }  


 @Override
    String Print (){
    return ("the employee name is : "+Fname+ " "+ Lname+ " ,the Employee address is  : "
            + address + " ,the employee Phone # : "+number);   
} 
}

Answer 1

在Super_Employee中添加无参数构造函数

Super_Employee() { }

从那时起，你就拥有了

Super_Employee(String Fname,String Lname, String address, int number) {
    //...

编译器不提供默认构造函数(这是构造函数本身提供的无参构造函数)。