Java Practicals

Inheritance program 19 - Write a Java program to create an abstract class Employee with abstract methods calculateSalary() and displayInfo(). Create subclasses Manager and Programmer that extend the Employee class and implement the respective methods to calculate salary and display information for each role


//Employee.java
abstract class Employee {
  protected String name;
  protected double baseSalary;

  public Employee(String name, double baseSalary) {
    this.name = name;
    this.baseSalary = baseSalary;
  }

  public abstract double calculateSalary();

  public abstract void displayInfo();
}
//Manager.java
class Manager extends Employee {
  private double bonus;

  public Manager(String name, double baseSalary, double bonus) {
    super(name, baseSalary);
    this.bonus = bonus;
  }

  @Override
  public double calculateSalary() {
    return baseSalary + bonus;
  }

  @Override
  public void displayInfo() {
    System.out.println("\tManager Name: " + name);
    System.out.println("\tBase Salary: $" + baseSalary);
    System.out.println("\tBonus: $" + bonus);
    System.out.println("\tTotal Salary: $" + calculateSalary());
  }
}
//Programmer.java
class Programmer extends Employee {
  private int overtimeHours;
  private double hourlyRate;

  public Programmer(String name, double baseSalary, int overtimeHours, double hourlyRate) {
    super(name, baseSalary);
    this.overtimeHours = overtimeHours;
    this.hourlyRate = hourlyRate;
  }

  @Override
  public double calculateSalary() {
    return baseSalary + (overtimeHours * hourlyRate);
  }

  @Override
  public void displayInfo() {
    System.out.println("\tProgrammer Name: " + name);
    System.out.println("\tBase Salary: $" + baseSalary);
    System.println("\tOvertime Hours: " + overtimeHours);
    System.out.println("\tHourly Rate: $" + hourlyRate);
    System.println("\tTotal Salary: $" + calculateSalary());
  }
}
//Main.java
public class Inheritance_19 {
  public static void main(String[] args) {
    System.out.println();
    Employee manager = new Manager("\tCorona Cadogan", 6000, 1000);
    Employee programmer = new Programmer("\tAntal Nuka", 5000, 20, 25.0);

    manager.displayInfo();
    System.out.println("\t---------------------");
    programmer.displayInfo();
  }
}

Output