Question

Let's update our program, SalaryCalcLoop.java, from last week, to now take input about each employee from a file and write their information and salary/pay information to a file.

Rashid
night
60
20
Chin
day
30
15
Tran
day
45
10
Deeshan
night
55
11.5
Serena
day
24
10
Deepak
day
66
12
Tyrone
night
11
18
Andre
night
80
15

import java.util.Scanner;
import java.io.*;
import java.io.FileWriter;
import java.util.NoSuchElementException;

public class SalaryCalcLoop{
double pay=0, OTpay=0;
void gpay(double hours, double wage){
if (hours <= 40){
pay = hours * wage;
OTpay = 0;
}
else{
double hr, OThr;
hr = 40;
OThr = hours - hr;
pay = hr * wage;
OTpay = OThr *(wage * 1.5);
}
}
public static void main(String[] args) throws IOException {

Scanner input = new Scanner(System.in);
String name;
String shifts;
int shift;
Double wage, hours;
int sentinel = 1;

while (sentinel != 0){
System.out.println("Please enter employee name");
name = input.next();
System.out.println("Please enter the shift.");
System.out.println("For the DAY shift enter 1. For the NIGHT shift enter 2.");
shift = input.nextInt();
System.out.println("How many hours did the employee work this week?");
hours = input.nextDouble();
System.out.println("Please enter your hourly wage.");
wage = input.nextDouble();
SalaryCalc s = new SalaryCalc();
s.gpay(hours, wage);
double totalpay = s.pay + s.OTpay;
System.out.println("Employee Name: "+name);
System.out.println("Employee's regular pay: "+s.pay);
System.out.println("Employee's overtime pay: "+s.OTpay);
System.out.println("Employee's total pay: "+totalpay);
if(shift == 1){
System.out.println("Employee's pay period is Friday");
}
else if(shift == 2){
System.out.println("Employee's pay period is Saturday");
}
System.out.println("Do you wish to enter another employee?");
System.out.println("Enter a number to continue or 0 to end");
sentinel = input.nextInt();
input.close();
}
}
}

Answer 1

import java.util.Scanner;
import java.io.*;
import java.io.FileWriter;

public class SalaryCalcFile {
double pay = 0, OTpay = 0;

void gpay(final double hours, final double wage) {
if (hours <= 40) {
pay = hours * wage;
OTpay = 0;
} else {
double hr, OThr;
hr = 40.0;
OThr = hours - hr;
pay = hr * wage;
OTpay = OThr * (wage * 1.5);
}
}
// methoid to read data from given file name and call methd to write the data to given output file name
static void readFromFile(final String fileNameInput, final String fileNameOutput) throws IOException {
// Scanner object to read from file
final Scanner fileInput = new Scanner(new File(fileNameInput));
// FIle Writer object to write data to the file
final FileWriter fw = new FileWriter(new File(fileNameOutput));
// some req variables
String name;
String shift;
Double wage;
Double hours;

//while file has some input
while (fileInput.hasNextLine()) {
// read data into variables
name = fileInput.nextLine();
shift = fileInput.nextLine();
hours = Double.valueOf(fileInput.nextLine());
wage = Double.valueOf(fileInput.nextLine());
// call write to file method to write data to file
writeToFile(name, shift, hours, wage, fw);
}

// close Scanner object
fileInput.close();
// close file writer object
fw.close();
}
// method to write data to the file
static void writeToFile(final String name, final String shift, final Double hours, final Double wage, final FileWriter fw) {
final SalaryCalcFile s = new SalaryCalcFile();
s.gpay(hours, wage);
final double totalpay = s.pay + s.OTpay;
// using try catch to catch some unexpected behaviour
try {
fw.write("Employee Name: " + name + '\n');
fw.write("Employee's regular pay: " + s.pay + '\n');
fw.write("Employee's overtime pay: " + s.OTpay + '\n');
fw.write("Employee's total pay: " + totalpay + '\n');
if (shift.equals("day")) {
fw.write("Employee's pay period is Friday" + "\n\n");
} else if (shift.equals("night")) {
fw.write("Employee's pay period is Saturday" + "\n\n");
}
} catch (final Exception e) {
// display the caught exception
System.out.println(e);
}

}

public static void main(final String[] args) throws IOException {

final Scanner input = new Scanner(System.in);
// variables to store name of input and output files
String fileNameInput;
String fileNameOutput;
System.out.println("Enter the name of the input file: ");
fileNameInput = input.nextLine();
System.out.println("Entere the Name of the Output File");
fileNameOutput = input.nextLine();
// cll read from file method
readFromFile(fileNameInput, fileNameOutput);
// close Scanner object
input.close();
// output messege to the console
System.out.println("Success...");
}
}

ScreenShots:

Output:

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