Programming Challenge in Java (Netbeans JDK) Design a class named Employee. The

Question

Programming Challenge in Java (Netbeans JDK)

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 Lis aletter 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 extends the Employee class. The
ProductionWorker class should have fields to hold the following information:
• Shift (an integer)
• Hourly pay rate (a double)
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.

Explanation / Answer

    import java.util.*;
       public class EmployeeClass
       {
          String name;             // Employee name
          String employeeNumber;   // Employee number
          String hireDate;         // Employee hire date
         
       /**
          The setEmployeeNumber method sets the employee's
          number.
          @param e The employee's number.
       */
          public void setEmployeeNumber(String e)
          {
             if (isValidEmpNum(e))
             {
                employeeNumber = e;
             }
             else
             {
                employeeNumber = "";
             }
          }
     
     
       /**
          This constructor initializes an object with a name,
          employee number, and hire date.
          @param n The employee's name.
          @param e The employee's number.
          @param h The employee's hire date.
       */
         
          public EmployeeClass(String n, String e, String h)
          {
             name = n;
             setEmployeeNumber(e);
             hireDate = h;
          }
       /**
          The no-arg constructor initializes an object with
          null strings for name, employee number, and hire
          date.
       */
        
          public EmployeeClass()
          {
             name = "";
             employeeNumber = "";
             hireDate = "";
          }
              /**
          The setName method sets the employee's name.
          @param n The employee's name.
       */
          public void setName(String n)
          {
             name = n;
          }
         
          /**
          The setHireDate method sets the employee's
          hire date.
          @param h The employee's hire date.
       */
          public void setHireDate(String h)
          {
             hireDate = h;
          }
       /**
          The getName method returns the employee's name.
          @return The employee's name.
       */
          public String getName()
          {
             return name;
          }
       /**
          The getEmployeeNumber method returns the
          employee's number.
          @return The employee's number.
       */
          public String getEmployeeNumber()
          {
             return employeeNumber;
          }
       /**
          The getHireDate method returns the
          employee's hire date.
          @return The employee's hire date.
       */
     
          public String getHireDate()
          {
             return hireDate;
          }
       /**
          isValidEmpNum is a private method that
          determines whether a string is a valid
          employee number.
          @param e The string containing an employee
                 number.
          @return true if e references a valid ID number,
                  false otherwise.
       */
          private boolean isValidEmpNum(String e)
          {
             boolean status = true;
        
             if (e.length() != 5)
                status = false;
             else
             {
                if ((!Character.isDigit(e.charAt(0))) ||
                    (!Character.isDigit(e.charAt(1)))   ||
                    (!Character.isDigit(e.charAt(2)))   ||
                    (e.charAt(3) != '-')                ||
                    (!Character.isLetter(e.charAt(4))) ||
               
                 //needs to check if between A and M
                 (!(e.charAt(4)>= 'A' && e.charAt(4)<= 'M')))
                {
                   status = false;
                }
             }
             return status;
          }
       /**
          toString method
          @return A reference to a String representation of
                  the object.
       */
     
          public String toString()
          {
             String str = "Name: " + name + " Employee Number: ";
        
             if (employeeNumber == "")
             {
                str += "INVALID EMPLOYEE NUMBER";
             }
             else
             {
                str += employeeNumber;
             }
           
             str += (" Hire Date: " + hireDate);
             return str;
          }
       }

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