Inheritance practice

Instructor.java

package com.company;

public class Instructor extends User{





}

InstructorManager.java

package com.company;

public class InstructorManager extends UserManager{

    
    }
}

Main.java

package com.company;

public class Main {

    public static void main(String[] args) {


	StudentManager studentManager = new StudentManager();
	InstructorManager instructorManager= new InstructorManager();
	UserManager userManager= new UserManager();


	Student student1= new Student();
	student1.setId(1);
	student1.setFirstName("Can");
	student1.setLastName("Yoldaş");
	student1.setEmail("can.yoldas0@outlook.com");

	Instructor instructor1= new Instructor();
	instructor1.setId(2);
	instructor1.setFirstName("Engin");
	instructor1.setLastName("Demiroğ");
	instructor1.setEmail("engindemirog@gmail.com");

	userManager.add(student1);
	userManager.add(instructor1);
	userManager.signIn(student1);
	studentManager.registerToClass(student1);

	




    }
}

Student.java

package com.company;

public class Student extends User{


}

StudentManager.java

package com.company;

public class StudentManager extends UserManager{

    }
}

User.java

package com.company;

public class User {

    private int id;
    private String firstName;
    private String lastName;
    private String email;


    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }



}

UserManager.java

package com.company;

public class UserManager {

    public void add(User user) {
        System.out.println("New user is added: " +user.getFirstName() + " " + user.getLastName());
    }

    public void signIn(User user) {
        System.out.println("Signed in.");

    }

    public void signOut(User user) {
        System.out.println("Signed out.");
    }


}