Question

I need to create file called EvilPerson.java. This implements a class that inherits from Person. The EvilPerson class doesn’t want you to be able to set a phone number for a user, so it always stores the text “n/a” in the phone attribute. You should define a constructor for EvilPerson that takes in a name and a phone number, stores the name correctly but throws away the phone number values and stores “n/a” there instead. The setPhone() method from Person should also be overridden in EvilPerson to do the same thing (store “n/a” instead of the provided phone number).
In the UsePerson.java file instantiate an EvilPerson object after you instantiate the Person object. Try and give a reasonable name and phone number for EvilPerson. Add another call to showPerson() and give the EvilPerson object as the argument to that call. You should see “n/a” output for the EvilPerson’s phone number.

Person Class

public class Person
{
   String name;
   String phone;

   public Person()
   {
       name = new String();
       phone = new String();
   }

   public Person(String name, String phone)
   {
       this.name = name;
       this.phone = phone;
   }

   public void setName(String name)
   {
       this.name = name;
   }

   public void setPhone(String phone)
   {
       this.phone = phone;
   }

   public String getName()
   {  
       return name;
   }

   public String getPhone()
   {
       return phone;
   }

}

Answer 1

//EvilPerson.java

public class EvilPerson extends Person {
   public EvilPerson(String name, String phone) {
       super(name,"n/a");
   }
  
   public void setPhone(String phone) {
       this.phone = "n/a";
   }

}

//Lines to add in usePerson.java;

Person evilPerson = new EvilPerson("Dr. Acula", "666");
       showPerson(evilPerson);