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?? ???? ?? ??? ???? ?? ?? EmployeeParent ???? ?? ManagerChild ?? ???? ??? ?? ??? ???????. ?? ???? ?? ??? ???? ?? ???? ?? ???? ?? ?? ?????? ??? ?????.

EmployeeParent.java

package oops.abstract_class;

public abstract class EmployeeParent {
    private int id, depId;
    private String name;
    private double basicSal;

    public EmployeeParent(int id, String name, int deptId, double basicSal) {
        this.id = id;
        this.depId = deptId;
        this.name = name;
        this.basicSal = basicSal;
    }

    // Abstract method to be implemented by subclasses.
    protected abstract double computeNetSalary();

    protected double getBasicSal() {
        return basicSal;
    }

    @Override
    public String toString() {
        return "EmployeeParent [id=" + id + ", depId=" + depId +
               ", name=" + name + ", basicSal=" + basicSal + "]";
    }
}

---

ManagerChild.java

package oops.abstract_class;

public class ManagerChild extends EmployeeParent {
    private double perfBonus;

    public ManagerChild(int id, String name, int deptId, double basicSal, double perfBonus) {
        // Calling the constructor of the abstract class.
        super(id, name, deptId, basicSal);
        this.perfBonus = perfBonus;
    }

    // Implementing the abstract method from EmployeeParent.
    @Override
    public double computeNetSalary() {
        return getBasicSal() + perfBonus;
    }

    @Override
    public String toString() {
        return "ManagerChild [perfBonus=" + perfBonus + "\n" + super.toString() + "]";
    }

    public static void main(String[] args) {
        ManagerChild manager = new ManagerChild(1, "Arshi", 2, 10000, 1890);
        System.out.println(manager);
        System.out.println("Net Salary: " + manager.computeNetSalary());

        // Abstract class cannot be instantiated 
        EmployeeParent employee = new EmployeeParent(); // Compile Error
    }
}

---

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3. ManagerChild? EmployeeParent? ???? ?? ???? ??? ? ??? ???? ?? ?? ??? ?????.

4. ?? ???? ?? ?????? ? ???? ?? ??? ???? super() ??? ?? ?? ??? ???? ?????.

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