Question

Design a class named Employee. The class should keep the following information in fields:

·         Employee name

·         Employee number in the format XXX–L, where each X is a digit within the range 0–9 and the L is a letter within the range A–M.

·         Hire date

Write one or more constructors and the appropriate accessor and mutator methods for the class. Next, write a class named ProductionWorker that inherits from the Employee class. The ProductionWorker class should have fields to hold the following information:

·         Shift (an integer)

·         Hourly pay rate (a double)

·         Add hours and calculate pay

The workday is divided into two shifts: day and night. The shift field will be an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Write one or more constructors and the appropriate accessor and mutator methods for the class. Demonstrate the classes by writing a program that uses a ProductionWorker object.

Answer 1

/*Java program to create a super class Employee and a sub class ProductionWorker .Then constructors
of super class and class are added.Accessor and mutator methods for all the fields are added.

In main program create the object of subclass and pass the employee name,number,hiredate, shift,hourly pay rate,
and hours are passed to the constructor. and the program computes the pay of an employee and display all the informations*/

//The super class Employee
class Employee
   {
   //data fields
   private String name;
   private String hiredate;
   private String number;
   //constructors to set name,number and hiredate
   public Employee(String n,String hd,String num)
       {
           name=n;
           hiredate=hd;
           number=num;
       }
   //accessors methods of Employee class defined below
   public String getName()
       {
       return name;
       }
   public String getHireDate()
       {
       return hiredate;
       }
   public String getNumber()
       {
       return number;
       }

   //mutator methods of Employee class defined below
   public void setName(String n)
       {
       name=n;
       }
   public void setHireDate(String hd)
       {
       hiredate=hd;
       }
   public void setNumber(String n)
       {
       number=n;
       }

   }

class ProductionWorker extends Employee
   {
       private int shift;
       private double hourlyRate;
       private int hours;

       //constructors to set name,number and hiredate, shift,hourly rate and hours
       public ProductionWorker(String ename,String enumber,String hd,int sh,double hrate,int hr)
           {
               super(ename,hd,enumber);
               shift=sh;
               hourlyRate=hrate;
               hours=hr;
           }

       //accessors methods of ProductionWorker class defined below
       public int getHours()
           {
           return hours;
           }

       public int getShift()
           {
           return shift;
           }
       public double getHourlyRate()
           {
           return hourlyRate;
           }

       //mutator methods of ProductionWorker class defined below
       public void setShift(int sh)
           {
           shift=sh;
           }
       public void setHourlyRate(double hr)
           {
           hourlyRate=hr;
           }

       public void setHours(int hr)
           {
           hours=hr;
           }

       public String getName()
           {
           return super.getName();
           }
       public String getHireDate()
           {
           return super.getHireDate();
           }
       public String getNumber()
               {
               return super.getNumber();
           }

       //calculate the pay
       public double calculatePay()
                   {
                   double pay=hours*hourlyRate;
                   return pay;
           }
       }

public class TestEmp
   {
   public static void main(String args[])
       {
       //test1
       ProductionWorker worker1=new ProductionWorker("Harry Biston","222B","12-4-2015",1,100.00,6);
       System.out.println("Employee Name   :"+worker1.getName());
       System.out.println("Employee Number   :"+worker1.getNumber());
       System.out.println("Hire Date   :"+worker1.getHireDate());
       String shift=worker1.getShift()==1? " Day":" Night";
       System.out.println("Shift       :"+shift);
       System.out.println("Hourly rate   :"+worker1.getHourlyRate());
       System.out.println("Hours worked   :"+worker1.getHours());
       System.out.println("Pay   =   :"+worker1.calculatePay());
   System.out.println("\n");
       //test2
       ProductionWorker worker2=new ProductionWorker("SSg Mishra","124H","22-1-2010",2,120.00,5);
       System.out.println("Employee Name   :"+worker2.getName());
       System.out.println("Employee Number   :"+worker2.getNumber());
       System.out.println("Hire Date   :"+worker2.getHireDate());
       shift=worker2.getShift()==1? " Day":" Night";
       System.out.println("Shift       :"+shift);
       System.out.println("Hourly rate   :"+worker2.getHourlyRate());
       System.out.println("Hours worked   :"+worker2.getHours());
       System.out.println("Pay   =   :"+worker2.calculatePay());
       }

}

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