Question

Give an example of how to build an array of objects of a super class with its subclass objects. As well as, use an enhanced for-loop to traverse through the array while calling a static method(superclass x). Finally, create a static method for the class that has the parent class reference variable.

Answer 1

​
public class Colleges

    {

    private static Teacher[] teachers;

    public Colleges()

    {

    teachers= new Teacher[]{new Dean("Sapo",10000),new Teacher("James",5000),new Teacher("Jessie",5001)};

    }

    public static void main(String[] args)

    {

        Colleges colleges= new Colleges();

        teachers[0].setBonus(50);

        System.out.println(teachers[0].getBonus());   

    }

    }

 

public class Teacher extends Person
{

 int salary;
public Teacher(String name,int salary) {
    super(name);
    setSalary(salary);

    // TODO Auto-generated constructor stub
}

public void setSalary(int salary)
{

    this.salary= salary;
}

public int getSalary()
{

    return salary;
}

}

 

public class Dean extends Teacher {
  private final int bonus;

 
  public Dean(String name, int salary, int bonus) {
    super(name, salary);
    this.bonus = bonus;
  }


 
  @Override
  int getSalary() {
    return super.getSalary() + bonus;
  }


​