Java polymorphism Example

Write a superclass Worker with subclasses HourlyWorker and SalariedWorker.Every worker has a name and a salary rate.An hourly worker gets paid the hourly wage for the actual number of hours worked, if the hours is atmost 40.If the hourly woker worked more than 40 hours,the excess is paid at time and a half.The salaried worker gets paid the hourly wage for 40 hours no matter what the actual number of hours is.Write a static method computePay which takes a parameter as Worker and uses polymorphism to compute the pay of any worker.Supply a test program that tests these classes and methods.

SOLUTION:

 
import java.util.Scanner;

public class PolymorphismExample {
public static void main(String[] args) {
  HourlyWorker h1=new HourlyWorker("Hourly Worker",30);
  SalariedWorker s1=new SalariedWorker("Salaried Worker",50);
  h1.computePay(h1);
  s1.computePay(s1);
 }
}

class Worker {
 String name;
 int salaryRate;
 Worker(){}
 Worker(String n,int s) {
  this.name=n;
  this.salaryRate=s;
 }
}

class HourlyWorker extends Worker { 
 public HourlyWorker(String s,int n) {
   super(s,n);
 }
 
 static void computePay(Worker a) {
  System.out.println("name: "+a.name);
  System.out.print("Enter hours worked:");
  Scanner input=new Scanner(System.in);
  int hourWorked=input.nextInt();
  if(hourWorked<40)
   System.out.println("Salary: "+(hourWorked*a.salaryRate));
  else {
   int sum=40*a.salaryRate;
   sum += 1.5 * (hourWorked-40) * a.salaryRate;
   System.out.println("Salary: "+sum);
  }
 }
}

class SalariedWorker extends Worker {
 public SalariedWorker(String s,int n) {
  super(s,n);
 }
 
 static void computePay(Worker b) {
  System.out.println("name: "+b.name);
  System.out.println("Salary: "+(40*b.salaryRate));
 }
}