Question

Your company has asked you to develop a report detailing payroll information with the following format:

Acme Corporation

Number of Employees: 3

Average Salary: 70,530.70

Annual Total: 211,592.09

Name Rank Salary

Gator, Allie A2 48,000.00

Mander, Sally A1 61,123.89

Zah, Pete A1 102,468.20

Develop an Employee class that contains first name, last name, rank, and salary. The class should have the following methods:

parameterized constructor

getters necessary for printing the report

formatName() method that returns a String with the name in the format last, first

Employee information is stored in a sequential text file named employees.txt. The file has the format:

employees.txt file: text file with the following fields separated by spaces:

Fields Description

First Name string

Last Name string

Rank string

Salary double

Note: Names will not contain spaces.

Write a program named Prog5 that reads employee information from the file and places a corresponding Employee object into an array. After the file has been read, print the report shown above using proper formatting.

 

Challenge

For those who would like a challenge to increase the difficulty of the assignment, implement the following static methods to be used to print the average salary and annual total, both of which receive an array of doubles and the number of elements in the array:

averageSalary( Employee arr[], int numreturns the average salary of employees in the array

totalSalary( Employee arr[], int num ) returns the sum of all salaries of employees in the array

Note: This is not required and should not be attempted until you have the basic assignment completed.

Requirements

• Your source code should follow the Java programming standards for the course.

• Your source code should be documented using Javadoc style according to the course standards.

• Use the default package in your project; do not specify a package in your code.

• Use any file and class names specified in the assignment.

Answer 1

Program :

see the program screenshots for the indentation reference!

Employee.java

/*
*The employees class 
*/
public class Employee
{
    /*
    *private data members
    */
    private String firstName;
    private String lastName;
    private String rank;
    private double salary;
    
    /*
    *parameteraized constructor
    */
    public Employee(String fname,String lname,String rank,double salary)
    {
        this.firstName = fname;
        this.lastName = lname;
        this.rank = rank;
        this.salary = salary;
    }
    
    /*
    *Getter methods
    */
    public  String getFirstName()
    {
        return firstName;
    }
    public String getLastName()
    {
        return lastName;
    }
    public String getRank()
    {
        return rank;
    }
    public double getSalary()
    {
        return salary;
    }
    
    /* 
    *format name method with lastName, firstName
    */
    public String formatName(){
        return lastName + ", "+firstName;
    }
    
    /* 
    *method to calculate Total salary of the all employees passed as array of employee 
    */
    public static double totalSalary(Employee arr[], int num)
    {
        double total=0;
        for(int i=0; i<num; i++)
        {
            total = total + arr[i].getSalary();
        }
        return total;
    }
    
    /* 
    *method to calculate average salary of the all employees passed as array of employee 
    */
    public static double averageSalary(Employee arr[], int num)
    {
        return totalSalary(arr,num)/num;
    }
}

Prog5.java

import java.io.File; 
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.Scanner; 
import java.util.ArrayList;
public class Prog5
{
    public static void main(String args[])
    {
        /*
        Reading all lines from the employees.txt file in the arraylist of Strings
        */
        ArrayList<String> lines = new ArrayList<String>();
        try {
            // pass the path to the file as a parameter 
            File file = new File("employees.txt"); 
            BufferedReader br = new BufferedReader(new FileReader(file));  
            String line; 
            while ((line = br.readLine()) != null) 
            {
                lines.add(line);
            } 
        } catch(Exception e) {
            System.out.println(e);
        } 
        
        /*
        *Number of lines present in the file
        */
        int num = lines.size();
        
        /*
        *Creating the array of employees
        */
        Employee employees[] =  new Employee[num];
        
        /*
        *for each of the line in the employees.txt
        *create the Employee object
        */
        int i=0;
        for(String line : lines)
        {
            String tokens[] = line.split(" ");
            employees[i] = new Employee(tokens[0], tokens[1], tokens[2], Double.parseDouble(tokens[3]));
            i++;
        }
        
        
        /*
        *Displaying the details of the employees 
        */
        System.out.println("Acme Corporation\n");
        System.out.println("Number of Employees: "+num);
        System.out.println("Average Salary: "+String.format("%,.2f",Employee.averageSalary(employees,num)));
        System.out.println("Annual Total: "+String.format("%,.2f",Employee.totalSalary(employees,num)));
        System.out.println();
        System.out.println("Name\t\tRank\tSalary");
        for(Employee e : employees)
        {
            System.out.println(e.formatName()+"\t"+e.getRank()+"\t"+String.format("%,.2f", e.getSalary()));
        }
    }
}

employees.txt

Allie Gator A2 48000.00
Sally Mander A1 61123.89
Pete Zah A1 102468.20

Output Screenshot :

Program screenshots for indentation reference :