Question

You will be writing a multiclass user management system using the java. Create a program that implements a minimum of four classes. The classes must include: 1 Employee Class with the attributes of Employee ID, First Name, Middle Initial, Last Name, Date of Employment 2. EmployeeType Class that has two instances of EmployeeType objects: salaried and hourly. Each object will have methods that calculates employees payroll( you may use attributes from Assignment 2), but you must handle the calculation in a method. Assume that you have hourly employees who work overtime and if the hours they worked over 40 hours, they must be paid one-and-one-half times the regular rate of pay for all hours worked over 40 hours. Both federal and state tax must be calculated 3. Address Class that handles address of the employee: attributes include street address city, state, zip code 4. Contact Class - The Contact class will have email and phone attributes, you may also create an instance of Address object The above four classes are required, but you can add more if you want to make your program a realistic application of the real world Note Be Careful 1. Do not accept negative number for any of the items entered. 2. The program must be able to register a minimum of three employees at a time. 3. Registered employees can be looked up using their employee id(3 points Extra credit, you are not permitted to use Array) 4. Use different data types (int, string, double, boolean, char) 5. Do not use array in this program - if you use array, you will lose 15 points Grading 1. Class diagram and class relationship 6 points 2. Documentation 3 points 3. Program Correctness 28 points 4. Unit testing 3 points - screenshot of program output

My Java code from last assignment:

Previous Java code:

public static void main(String args[]) {

// While loop set-up

boolean flag = true;

while (flag) {

Scanner sc = new Scanner(System.in);

// Ask user to enter employee number

System.out.print("Enter employee number: ");

int employee_number = sc.nextInt();

// Ask user to enter last name

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

String last_name = sc.next();

// Ask user to enter number of hours worked

System.out.print("Enter number of hours worked: ");

int hours_worked = sc.nextInt();

while (true) {

if (hours_worked >= 0) {

break;

} else {

System.out.print("Hours worked must be greater or equal to 0. Please enter hours again. ");

hours_worked = sc.nextInt();

}

// Ask user to enter hourly rate

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

double hourly_rate = sc.nextDouble();

while (true) {

if (hourly_rate >= 0) {

break;

} else {

System.out.print("Hourly rate must be greater or equal to 0. Please enter hours again. ");

hourly_rate = sc.nextDouble();

}

}

// Ask user to enter state tax

System.out.print("Enter state tax: ");

double state_tax = sc.nextDouble();

while (true) {

if (state_tax >= 0) {

break;

} else {

System.out.print("State tax must be greater or equal to 0. Please enter again. ");

state_tax = sc.nextDouble();

}

}

// Ask user to enter federal tax rate

System.out.print("Enter federal tax rate: ");

double federal_tax_rate = sc.nextDouble();

while (true) {

if (federal_tax_rate >= 0) {

break;

} else {

System.out.print("Federal tax rate must be greater or equal to 0. Please enter again. ");

federal_tax_rate = sc.nextDouble();

}

}

// User inputs are calculated and then printed

System.out.println("Employee number :" + employee_number);

System.out.println("Employee Last Name :" + last_name);

System.out.println("Number of hours worked :" + hours_worked);

System.out.println("Hourly rate :" + hourly_rate);

System.out.println("State tax :" + state_tax);

System.out.println("Federal tax Rate :" + federal_tax_rate);

double gross = (hours_worked * hourly_rate);

System.out.println("Groll pay :" + gross);

double net = gross - (gross * state_tax) - (gross * federal_tax_rate);

System.out.println("Net pay :" + net);

sc.nextLine();

// Ask user to enter either yes or no

System.out.println("Would you like to enter the second employees information ?");

String option = sc.nextLine();

String option1 = "";

// all letters will be converted to upper case

option1 = option.toUpperCase();

// Y or YES will be set as true, else false

if ((option1.equals("Y")) || (option1.equals("YES"))) {

flag = true;

} else if ((option1.equals("N")) || (option1.equals("NO"))) {

System.out.println("enter 0 to exit");

int number = sc.nextInt();

// entering 0 will exit the system

if (number == 0) {

flag = false;

Please have the above four classes and do not use array.

Answer 1

int eid=0;
import java.util.Scanner.*;
class Employee
{
int EmployeeId;
String FirstName,MiddleInitial,LastName;
Date DateOfEmployement;
public Employee()
{
EmployeeId=++eid;
Scanner s = new Scanner(System.in);
System.out.println("Enter Employee Details : ");
System.out.println("Enter your First name : ");
FirstName = s.getString();
System.out.println("Enter your Middle Initial : ");
MiddleInitial = s.getString();
System.out.println("Enter your Last Name : ");
LastName = s.getString();
System.out.println("Enter the date of Employement :");
DateOfEmployement = s.getDate();
}
void display()
{
System.out.println("First Name : " + FirstName);
System.out.println("Middle Initial : " + MiddleInitial);
System.out.println("Last Name : " + LastName);
System.out.println("Date of Employement : " + DateOfEmployement);
}
}
class EmployeeType extends Employee
{
void payroll()
{
int pay;
pay = month * 100;
System.out.println(pay);
}
}
class Address
{
String StreetAddress,city,state;
int zipcode;
Address()
{
Scanner sca = new Scanner(System.in);
System.out.println("Enter Street Address : ");
StreetAddress = sca.nextString();
System.out.println("Enter City : ");
city = sca.nextString();
System.out.println("Enter State");   
state = sca.nextString();
System.out.println("Enter Zip Code");
zipcode = sca.nextInt();
}
void display()
{
System.out.println("Street Address : " + StreetAddress);
System.out.println("City : " + city);
System.out.println("State : " + state);
System.out.println("Zip Code : " + zipcode);
}
}
class Contact
{
String email;
long phone;
Contact()
{
Scanner scan = new Scanner(System.in);
System.out.println("Enter Email Address : ");
email = scan.nextString();
System.out.println("Enter Phone no : ");
phone = scan.nextInt();
}
void display()
{
System.out.println("Email Address : " + email);
System.out.println("Phone Number : " + phone);
}
}
public class EmployeeDetails
{
public static void main(String [] args)
{
EmployeeType salaried = new EmployeeType();
EmployeeType hourly = new EmployeeType();
Scanner sc = new Scanner(System.in);
System.out.println("What would you like to do ?");
System.out.println("1.Register Employees");
System.out.println("2.View Employee Details");
System.out.println("3.Calculate Salary");
int ch;
while(1)
{
ch = sc.nextInt();
switch (ch)
{
case 1:
System.out.println("How many employees do you like to register ?");
int no,i;
no = sc.nextInt();
for(i=0;i<n;i++)
{
Employee e = new Employee();
Address add = new Address();
Contact c = new Contact();
}
break;
case 2:
System.out.println("Employee Details : ");
for(i=0;i<n;i++)
{
Employee e = new Employee();
e.display();
Address add = new Address();
add.display();
Contact c = new Contact();
c.display();
}
break;
case 3:
salaried.payroll();
horly.payroll();
break;
}
}
}
}