Question

Java Programming Reading from a Text File

Write a Java program that will use an object of the Scanner class to read employee payroll data from a text file The Text file payroll.dat has the following: 100 Washington Marx Jung Darwin George 40 200 300 400 Kar Car Charles 50 22.532 15 30 The order of the data and its types stored in the file are as follows: Data EmployeelD Last name FirstName HoursWorked double HourlyRate Data Tvpe String String double The main method will define a constant String for the file name. The main method will read the file. Then it will call a method that uses hours worked and pay rate to calculate regular, overtime, and total pay. Multiply overtime hours by 1.5 and calculate regular pay only on hours less than or equal to 40 After pay is calculated and returned to main, main will call a method to display the following output: Rate Regular Overtime Total Hours Worked Hourly Pay 40.00 50.00 15.00 55.00 Last Name First Name Emp ID 100 200 300 400 Pay Pay 1000.00 Washington, George Marx 25.00 1000.00 0.00 22.50 900.00 337.50 1237.50 32.00 480.00 0.00 30.00 1200.00 675.00 1875.00 Karl Carl Charles 480.00 un Darwin, When the main method creates the new Scanner object, Java will require it to catch a FileNotFoundException. If this happens, display a descriptive message to the user and exit the program using System.exit(-1); When reading data from the file, catch an InputMismatchException to handle problems such as reading a non-numeric value when the program expected an int or double. If this occurs, display a message, close the Scanner object and exit the program

Answer 1

Code

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Payroll
{
public static void main(String[] args)
{
final String fileName="payroll.dat";
File file = new File(fileName);
try
{
// Create a new Scanner object which will read the data
// from the file passed in. To check if there are more
// line to read from it we check by calling the
// scanner.hasNextLine() method. We then read line one
// by one till all lines is read.
Scanner scanner = new Scanner(file);
  
String line = scanner.nextLine();
String []id=line.split("\t");
line = scanner.nextLine();
String []lastName=line.split("\t");
line = scanner.nextLine();
String []firstName=line.split("\t");
line = scanner.nextLine();
String []hoursWorked=line.split("\t");
line = scanner.nextLine();
String []hourlyRate=line.split("\t");
float []regularPay=new float[hourlyRate.length];
float []overtimePay=new float[hourlyRate.length];

for(int i=0;i<hourlyRate.length;i++)
{
regularPay[i]=calculateReaularPay(Float.parseFloat(hoursWorked[i]),Float.parseFloat(hourlyRate[i]));
overtimePay[i]=calculateOvertimePay(Float.parseFloat(hoursWorked[i]),Float.parseFloat(hourlyRate[i]));
}
display(id,lastName,firstName,hourlyRate,hoursWorked,regularPay,overtimePay);
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
}

private static float calculateReaularPay(float hrWorked, float hrRate) {
if(hrWorked<=40)
return hrRate*hrWorked;
else
return hrRate*40;
}

private static float calculateOvertimePay(float hrWorked, float hrRate)
{
if(hrWorked>40)
return (float)((hrWorked-40)*(1.5*hrRate));
else
return 0;
}

private static void display(String[] id, String[] lastName, String[] firstName, String[] hourlyRate, String[] hoursWorked, float[] regularPay, float[] overtimePay) {
System.out.printf("%-15s%-15s%-15s%-15s%-15s%-15s%-15s%-15s\n","Emp Id","Last Naame","First Name","Hours Worked","Rate Hourly","Regular pay","Overtime Pay","Total pay");
for(int i=0;i<id.length;i++)
{
System.out.printf("%-15s%-15s%-15s%-15.2f%-15.2f%-15.2f%-15.2f%-15.2f\n",id[i],lastName[i],firstName[i],Float.parseFloat(hoursWorked[i]),Float.parseFloat(hourlyRate[i]),regularPay[i],overtimePay[i],(regularPay[i]+overtimePay[i]));
}
}
  
}
output

Payroll from file - NetBeans IDE 8.0.1 Search (Ctrl+1) File Edit View Navigate Source Refactor Ru Debug Profile Team Iools Window Help <defoult config> Output Debugger Console x Payrol from fle (run) * run Emp Id 100 200 300 400 BUILD SUCCESSFUL (total time: 0 seconds) Last Naame Washington Marx Tung Darwin First Name George Karl Carl charles Hours Worked Rate Hourly Reglar pay Overtime Pay Total pay 40.00 50.00 15.00 55.00 1000.00 900.0 480.00 1200.00 25.00 22.50 32.00 30. 00 0.00 337.50 0.00 675.00 1000.00 1237.50 480.00 1875.00 ④ Notifications Bookmarks Output 64: 181 INS 15:43 rP ^脈偏恤4x ENG 25-04-2019 O Type here to search

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