Employee and ProductionWorkder Classes

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

Employee name

Employee number

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 formation:

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.

2. Modify the Employee and ProductionWorker classes so they throw exceptions when the following errors occur:

The Employee class should throw an exception named InvalidEmployeeNumber when it receives an invalid employee number

The ProductionWorker class should throw an exception named InvalidShift when it receives an invalid shift

The ProductionWorker class should throw an exception named InvalidPayRate when it receives a negative number for the hourly pay rate.

For the employee number, I want the exception to be for a 6 digit number

For the InvaildShift, I want it to throw the exception if the user inputs an invalid number ( not 1 or 2)

For the InvalidPayRate it should be used when the user puts a negative number

I have the following:

Employee.java

import java.util.Scanner; // Needed for the Scanner class

import java.io.*; // Needed for file classes

public class Employee{

private String employeeName;

private String employeeNumber;

private String hireDate;

// default constructor implementation

public Employee()

{

employeeName = "";

employeeNumber = "";

hireDate = "";

}

// parameterized constructor implementation

public Employee(String empName, String empNumber, String date) throws InvalidEmployeeNumber

{

setEmployeeName(empName);

setEmployeeNumber(empNumber);

setHireDate(date);

}

// accessor methods

// getEmployeeName method implementation

public String getEmployeeName()

{

return employeeName;

}

// getEmployeeNumber method implementation

public String getEmployeeNumber()

{

return employeeNumber;

}

// getHireDate method implementation

public String getHireDate()

{

return hireDate;

}

// mutator methods

// setEmployeeName method implementation

public void setEmployeeName(String empName)

{

employeeName = empName;

}

// setEmployeeNumber method implementation

public void setEmployeeNumber(String empNumber) throws InvalidEmployeeNumber

{

if(empNumber.length() == 6 && Character.isDigit(empNumber.charAt(0))

&& Character.isDigit(empNumber.charAt(1))

&& Character.isDigit(empNumber.charAt(2))

&& Character.isDigit(empNumber.charAt(3))

&& Character.isDigit(empNumber.charAt(4))

&& Character.isDigit(empNumber.charAt(5))

)

{

employeeNumber = empNumber;

}

else

{

employeeNumber = "Invalid number must be 6 digits no more, no lesss";

throw new InvalidEmployeeNumber();

}

}

// setHireDate method implementation

public void setHireDate(String date)

{

hireDate = date;

}

// toString method implementation

public String toString()

{

String result = "";

result = "Employee name: " + employeeName + " "

+ "Employee number: " + employeeNumber + " "

+ "Employee hire date: " + hireDate;

return result;

}

}

ProductionWorker.java

import java.util.Scanner; // Needed for the Scanner class

import java.io.*; // Needed for file classes

public class ProductionWorker extends Employee

{

//set int values to types of shifts

public final int NoShift = 0;

public final int DShift = 1;

public final int NShift = 2;

//data fields

private int shift;

private double hourlyPayRate;

// default constructor implementation

public ProductionWorker()

{

super();

shift = NoShift;

hourlyPayRate = 0.0;

}

// parameterized constructor implementation

public ProductionWorker(String empName, String empNumber, String date, int sh, double rate)

{

super(empName, empNumber, date);

setShift(sh);

setHourlyPayRate(rate);

}

// accessor methods

// getShift method implementation

public int getShift()

{

return shift;

}

// getHourlyPayRate method implementation

public double getHourlyPayRate()

{

return hourlyPayRate;

}

// mutator methods

// setShift method implementation

public void setShift(int sh) throws InvaildShift

{

if(sh == DShift || sh == NShift)

shift = sh;

else

{

throw new InvalidShift();

}

}

// setHourlyPayRate method implementation

public void setHourlyPayRate(double rate)

{

hourlyPayRate = rate;

}

// toString method implementation

public String toString()

{

String result = "";

result = super.toString() + " ";

if(shift == DShift)

result += "Shift: Day ";

else if(shift == NShift)

result += "Shift: Night ";

else

{

result += "Shift: Invalid ";

}

result += "Hourly pay rate: " + String.format("$%.2f", hourlyPayRate);

return result;

}

}

InvalidEmployeeNumber.java

public class InvalidEmployeeNumber extends Exception { public InvalidEmployeeNumber() { //error message super("Error: Invalid employee number found"); } }

InvalidShift.java

public class InvalidShift extends Exception

{

public InvalidShift()

{

//error message

super("Error: Invalid shift found");

}

}

InvalidPayRate.java

public class InvalidPayRate extends Exception { public InvalidPayRate() { //error message super("Error: Invalid pay rate found"); } }

ProductionWorkerDemo.java

import java.util.Scanner;

public class ProductionWorkerDemo extends Exception

{

// start main method

public static void main(String[] args)

{

// create an object for Scanner class

Scanner input = new Scanner(System.in);

char choice;

// repeat the loop until the user wants to exit

do

{

// prompt the user to enter the employee name

System.out.print("Enter the employee name: ");

String empName = input.nextLine();

// prompt the user to enter the employee number

System.out.print("Enter the 6 digit: ");

String empNumber = input.nextLine();

// prompt the user to enter the employee hire date

System.out.print("Enter the employee hire date: ");

String date = input.nextLine();

// prompt the user to enter the employee shift

System.out.print("Enter the employee shift (1 for day shift and 2 for night shift): ");

int sh = Integer.parseInt(input.nextLine());

// prompt the user to enter the employee hourly pay rate

System.out.print("Enter the hourly pay rate: $");

double rate = Double.parseDouble(input.nextLine());

if (rate < 0)

throw new InvalidPayRate("Invalid number must be positive");

// create an object for ProductionWorker class

try {

ProductionWorker worker = new ProductionWorker(empName, empNumber, date, sh, rate);

// display the details of the employee

System.out.println(" Details of the employee: ");

System.out.println(worker);

}

catch(InvalidPayRate invalidPayRate)

{

InvalidPayRate.getMessage();

InvalidPayRate.printStackTrace();

}

// prompt the user to enter the repetition choice

System.out.print(" Do you want to demonstrate another ProductionWorker object? (Y/N): ");

choice = input.nextLine().charAt(0);

System.out.println();

}while(choice == 'Y' || choice == 'y');

}

}

What I'm having trouble on is displaying multiple error messages if they incorrectly say the user makes multiple errors such as giving the wrong ID, wrong shift, and a negative number for pay rate? As of right now, if the user makes multiple errors, it only displays the first error. Any help will be appreciated!