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//This program asks the user to input a file, calculates the total services in the file, and outputs the value to another .txt file.

import java.io.*;

import java.util.*;

public class Expense {

//This askUser method's purpose is to ask the user what file he/she is looking for and it returns the value, which is stored in main.

public static String askUser() {

Scanner console = new Scanner(System.in);

System.out.println("Input a file you're looking for: ");

String enterFile = console.next();

return enterFile;

}

//This fileExist method checks to see if the file the user inputs exist or not. It returns the values true or false.

public static boolean fileExist(String fileName) {

File userFile = new File(fileName);

if (userFile.exists()) {

return true;

} else {

return false;

}

}

//This userFile method's purpose states that once the fileExist, it'll retrieve the file and we store it in main.

public static File userFile(String fileName) {

File userFile = new File(fileName);

return userFile;

}

//This scanFile method uses a while loop to scan the text file the user inputs.

public static void scanFile(File hotelFile) throws FileNotFoundException {

Scanner scanFile = new Scanner(hotelFile); //Create a Scanner object to scan the user's file which is passed in the parameter.

double conferenceTot = 0.0;

double dinnerTot = 0.0;

double spaTot = 0.0;

double roomTot = 0.0;

double lodgingTot = 0.0;

while (scanFile.hasNextLine()) { //This while loop test the condition that if the user's file has another line in the input

String fileLine = scanFile.nextLine();

Scanner lineScan = new Scanner(fileLine); //or i could have done new Scanner(fileLine).useDelimiter(";");

// the new delimiter to tokenize words is a semicolon

lineScan.useDelimiter(";");

lineScan.next();

String service = lineScan.next(); //second token is the service

//While scanning the file line by line, once the condition in the if statement is met, the loop proceeds and sums the total service for each service.

if (service.equals("Conference")) {

conferenceTot = conferenceTot + lineScan.nextDouble();

}

if (service.equals("Dinner")) {

dinnerTot = dinnerTot + lineScan.nextDouble();

}

if (service.equals("Spa")) {

spaTot = spaTot + lineScan.nextDouble();

}

if (service.equals("Room Service")) {

roomTot = roomTot + lineScan.nextDouble();

}

if (service.equals("Lodging")) {

lodgingTot = lodgingTot + lineScan.nextDouble();

}

}

System.out.printf("Dinner expenses: %.2f\n", dinnerTot);

System.out.printf("Lodging expenses: %.2f\n", lodgingTot);

System.out.printf("Conference expenses: %.2f\n", conferenceTot);

System.out.printf("Room Service expenses: %.2f\n", roomTot);

System.out.printf("Spa expenses: %.2f\n", spaTot);

PrintStream out = new PrintStream(new File("hotel_out.txt")); //Outputs each service value into another text file called hotel_out.txt.

out.printf("Dinner expenses: %.2f\n", dinnerTot);

out.printf("Lodging expenses: %.2f\n",lodgingTot);

out.printf("Conference expenses: %.2f\n", conferenceTot);

out.printf("Room Service expenses: %.2f\n", roomTot);

out.printf("Spa expenses: %.2f\n", spaTot);

}

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

String fileName = askUser();

boolean fileChecker = fileExist(fileName);

while (!fileChecker) {

//while the fileName is not the fileName the user inputs condition is true, let's do these 3 statements to keep asking the user for the right file.

System.out.println("File does not exist\n");

fileName = askUser(); //do the askUser() method again.

fileChecker = fileExist(fileName); //do the fileExist(fileName) method again.

// loop will end when the condition is false.

}

File userFile = userFile(fileName);

scanFile(userFile); //we only just passed the userFile inside the scanFile(File hotelFile) method

}

}