Question

Write a menu driven application to maintain the employee payroll details using JAVA.
Your application must contain the following functionalities. Use constructors, getter
and setter functions.

a. For each employee your application must have the details such as
name, empid, department, designation, experience, basicPay, DA,
gradePay, personalPay, iTax, professionalTax, epf
b. Get the employee details from user(admin)
c. In the menu give the user options to add, edit, delete or display the
employee details.

Answer 1

import java.util.ArrayList;
import java.util.Scanner;


class Employee {
	private String name;
	private String empid;
	private String department;
	private String designation;
	private String experience;
	private double basicPay;
	private double DA;
	private double gradePay;
	private double personalPay;
	private double iTax;
	private double professionalTax;
	private double epf;


	/**
	 * Constructor
	 * 
	 * @param name
	 * @param empid
	 * @param department
	 * @param designation
	 * @param experience
	 * @param basicPay
	 * @param DA
	 * @param gradePay
	 * @param personalPay
	 * @param iTax
	 * @param professionalTax
	 * @param epf
	 */
	public Employee(String name, String empid, String department, String designation, String experience,
			double basicPay, double DA, double gradePay, double personalPay, double iTax, double professionalTax,
			double epf) {
		this.name = name;
		this.empid = empid;
		this.department = department;
		this.designation = designation;
		this.experience = experience;
		this.basicPay = basicPay;
		this.DA = DA;
		this.gradePay = gradePay;
		this.personalPay = personalPay;
		this.iTax = iTax;
		this.professionalTax = professionalTax;
		this.epf = epf;
	}


	@Override
	public String toString() {
		return "Employee name: " + this.name + "\n" + "Employee ID: " + this.empid + "\n" + "Employee department: "
				+ this.department + "\n" + "Employee designation: " + this.designation + "\n" + "Employee experience: "
				+ this.experience + "\n" + "Employee basic pay: " + this.basicPay + "\n" + "Employee DA: " + this.DA
				+ "\n" + "Employee grade pay: " + this.gradePay + "\n" + "Employee personal pay: " + this.personalPay
				+ "\n" + "Employee iTax: " + this.iTax + "\n" + "Employee professional tax: " + this.professionalTax
				+ "\n" + "Employee epf: " + this.epf + "\n";


	}


	/**
	 * @return the name
	 */
	public String getName() {
		return name;
	}


	/**
	 * @param name the name to set
	 */
	public void setName(String name) {
		this.name = name;
	}


	/**
	 * @return the empid
	 */
	public String getEmpid() {
		return empid;
	}


	/**
	 * @param empid the empid to set
	 */
	public void setEmpid(String empid) {
		this.empid = empid;
	}


	/**
	 * @return the department
	 */
	public String getDepartment() {
		return department;
	}


	/**
	 * @param department the department to set
	 */
	public void setDepartment(String department) {
		this.department = department;
	}


	/**
	 * @return the designation
	 */
	public String getDesignation() {
		return designation;
	}


	/**
	 * @param designation the designation to set
	 */
	public void setDesignation(String designation) {
		this.designation = designation;
	}


	/**
	 * @return the experience
	 */
	public String getExperience() {
		return experience;
	}


	/**
	 * @param experience the experience to set
	 */
	public void setExperience(String experience) {
		this.experience = experience;
	}


	/**
	 * @return the basicPay
	 */
	public double getBasicPay() {
		return basicPay;
	}


	/**
	 * @param basicPay the basicPay to set
	 */
	public void setBasicPay(double basicPay) {
		this.basicPay = basicPay;
	}


	/**
	 * @return the dA
	 */
	public double getDA() {
		return DA;
	}


	/**
	 * @param dA the dA to set
	 */
	public void setDA(double dA) {
		DA = dA;
	}


	/**
	 * @return the gradePay
	 */
	public double getGradePay() {
		return gradePay;
	}


	/**
	 * @param gradePay the gradePay to set
	 */
	public void setGradePay(double gradePay) {
		this.gradePay = gradePay;
	}


	/**
	 * @return the personalPay
	 */
	public double getPersonalPay() {
		return personalPay;
	}


	/**
	 * @param personalPay the personalPay to set
	 */
	public void setPersonalPay(double personalPay) {
		this.personalPay = personalPay;
	}


	/**
	 * @return the iTax
	 */
	public double getiTax() {
		return iTax;
	}


	/**
	 * @param iTax the iTax to set
	 */
	public void setiTax(double iTax) {
		this.iTax = iTax;
	}


	/**
	 * @return the professionalTax
	 */
	public double getProfessionalTax() {
		return professionalTax;
	}


	/**
	 * @param professionalTax the professionalTax to set
	 */
	public void setProfessionalTax(double professionalTax) {
		this.professionalTax = professionalTax;
	}


	/**
	 * @return the epf
	 */
	public double getEpf() {
		return epf;
	}


	/**
	 * @param epf the epf to set
	 */
	public void setEpf(double epf) {
		this.epf = epf;
	}
}


public class EmployeeProject {


	private static int getEmployeeById(ArrayList<Employee> employees, String empid) {
		for (int i = 0; i < employees.size(); i++) {
			if (employees.get(i).getEmpid().compareTo(empid) == 0) {
				return i;
			}
		}
		return -1;
	}


	/**
	 * Main method
	 *
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int ch = -1;
		ArrayList<Employee> employees = new ArrayList<Employee>();
		while (ch != 5) {
			System.out.println("1. Add");
			System.out.println("2. Edit");
			System.out.println("3. Delete");
			System.out.println("4. Display the employee details");
			System.out.println("5. Exit");
			System.out.print("Your choice: ");
			ch = input.nextInt();
			switch (ch) {
			case 1: {
				input.nextLine();
				System.out.print("Enter employee name: ");
				String name = input.nextLine();
				System.out.print("Enter employee ID: ");
				String empid = input.nextLine();
				System.out.print("Enter employee department: ");
				String department = input.nextLine();
				System.out.print("Enter employee designation: ");
				String designation = input.nextLine();
				System.out.print("Enter employee experience: ");
				String experience = input.nextLine();
				System.out.print("Enter employee basic pay: ");
				double basicPay = input.nextDouble();
				System.out.print("Enter employee DA: ");
				double DA = input.nextDouble();
				System.out.print("Enter employee grade pay: ");
				double gradePay = input.nextDouble();
				System.out.print("Enter employee personal pay: ");
				double personalPay = input.nextDouble();
				System.out.print("Enter employee iTax: ");
				double iTax = input.nextDouble();
				System.out.print("Enter employee professional tax: ");
				double professionalTax = input.nextDouble();
				System.out.print("Enter employee epf: ");
				double epf = input.nextDouble();


				Employee newEmployee = new Employee(name, empid, department, designation, experience, basicPay, DA,
						gradePay, personalPay, iTax, professionalTax, epf);
				employees.add(newEmployee);
				System.out.println("\nEmployee has been added.\n");
			}
				break;
			case 2: {
				input.nextLine();
				System.out.print("Enter employee ID to edit: ");
				String empid = input.nextLine();
				int index = getEmployeeById(employees, empid);
				if (index != -1) {
					System.out.print("Enter a new employee name: ");
					String name = input.nextLine();
					System.out.print("Enter a new employee department: ");
					String department = input.nextLine();
					System.out.print("Enter a new employee designation: ");
					String designation = input.nextLine();
					System.out.print("Enter a new employee experience: ");
					String experience = input.nextLine();
					System.out.print("Enter a new employee basic pay: ");
					double basicPay = input.nextDouble();
					System.out.print("Enter a new employee DA: ");
					double DA = input.nextDouble();
					System.out.print("Enter a new employee grade pay: ");
					double gradePay = input.nextDouble();
					System.out.print("Enter a new employee personal pay: ");
					double personalPay = input.nextDouble();
					System.out.print("Enter a new employee iTax: ");
					double iTax = input.nextDouble();
					System.out.print("Enter a new employee professional tax: ");
					double professionalTax = input.nextDouble();
					System.out.print("Enter a new employee epf: ");
					double epf = input.nextDouble();


					Employee newEmployee = new Employee(name, empid, department, designation, experience, basicPay, DA,
							gradePay, personalPay, iTax, professionalTax, epf);
					employees.remove(index);
					employees.add(index, newEmployee);
					System.out.println("\nEmployee has been updated.\n");
				} else {
					System.out.println("\nWrong employee ID.\n");
				}
			}
				break;
			case 3: {
				input.nextLine();
				System.out.print("Enter employee ID to delete: ");
				String empid = input.nextLine();
				int index = getEmployeeById(employees, empid);
				if (index != -1) {
					employees.remove(index);
					System.out.println("\nEmployee has been deleted.\n");
				} else {
					System.out.println("\nWrong employee ID.\n");
				}
			}
				break;
			case 4: {
				input.nextLine();
				System.out.print("Enter employee ID to display: ");
				String empid = input.nextLine();
				int index = getEmployeeById(employees, empid);
				if (index != -1) {
					System.out.println(employees.get(index).toString());
				} else {
					System.out.println("\nWrong employee ID.\n");
				}
			}
				break;
			case 5: {
				// exit


			}
				break;


			default: {
				System.out.println("Wrong menu item.");


			}
				break;
			}
		}
		input.close();


	}


}