Question

​​​​​​​LANGUAGE IS JAVA

• Part One

• A hotel salesperson enters sales in a text file. Each line contains the following, separated by semicolons:
  • The name of the client,
  • the service sold (such as Dinner, Conference, Lodging, and so on),
  • the amount of the sale,
  • and the date of that event.
• Prompt the user for data to write the file.

  Part Two

• Write a program that reads the text file as described above, and that writes a separate file for each service category, containing the entries for that category. Name the output files Dinner.txt, Conference.txt, and so on.
• Enter the name of the output file from Part One as a command line argument.

  Both Parts

• For all programs, catch and handle the Exceptions appropriately and validate the input data where needed.
• Display an error if the sales file does not exist or the format is incorrect.
• Also, create your own exception to handle "unknown transaction" exceptions.

  Samples:

  • Contents of sales.txt (file created in part one)

    John Public;Dinner;29.95;6/7/2014
    Jane Public;Conference;499.00;8/9/2014
    Abby Lawrence;Dinner;23.45;10/10/2014
    

  • Contents of Dinner.txt (file created in part two)

    John Public;Dinner;29.95;6/7/2014
    Abby Lawrence;Dinner;23.45;10/10/2014
    

  • Contents of Conference.txt (file created in part two)

    Jane Public;Conference;499.0;8/9/2014
    

Grading Criteria

• You will be graded on the following components:
• Does the program do what is required
• Is it properly documented
• Is it fully tested
• As always, remember to create a default constructor and override the toString() method for all classes.
• Is it properly designed

Answer 1

CODE:

- Please implement the validations as per the requirement. This program will enter data in a file and segregate the files based on the services.

import java.io.*;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Scanner;

public class SalesPerson {
    public static void main(String[] args) {
        HashMap < String, String > services = new HashMap < String, String > ();
        try {
            FileWriter input = new FileWriter("D:\\BackendWorkspace\\MyWork\\src\\search\\" + "personalData" + ".txt"); // give your path here and replace personalData with the filename u want to give
            Scanner sc = new Scanner(System.in);
            int canEnterMore = 1;
            String name, service, amount, date, finalVal, temp = "";
            while (canEnterMore == 1) {
                System.out.println("Enter name of client , service , amount , date");
                name = sc.nextLine();
                service = sc.nextLine();
                amount = sc.nextLine();
                date = sc.nextLine();
                finalVal = name + ";" + service + ";" + amount + ";" + date;
                if (services.containsKey(service)) {
                    temp = services.get(service) + "%" + finalVal; // stores multiple data values in hashmap seperated by % corresponding to a particular service
                    services.put(service, temp);
                } else {
                    services.put(service, finalVal); // stores service data
                }
                input.write(finalVal + "\n");
                System.out.println("Do you want to add more? Press 1 to add more and press enter");
                canEnterMore = Integer.parseInt(sc.nextLine());
            }
            input.close();
            sc.close();
        } catch (IOException e) {
            System.out.println("An error has occurred.");
            e.printStackTrace();
        }

        //part 2 begins
        FileWriter input = null;
        Iterator hmIterator = services.entrySet().iterator();

        String fileName;
        while (hmIterator.hasNext()) { // iterate hasmap and push the data in individual files.
            Map.Entry mapElement = (Map.Entry) hmIterator.next();
            String allValues = ((String) mapElement.getValue());
            fileName = (String) mapElement.getKey();
            String[] tempArr = allValues.split("%");
            try {
                input = new FileWriter("D:\\BackendWorkspace\\MyWork\\src\\search\\" + fileName + ".txt");
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            for (int z = 0; z < tempArr.length; z++) {
                try {
                    input.write(tempArr[z] + "\n");
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            try {
                input.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    }
}

Sample Input/Output (Output will be data in the files created in your system)
- Kindly press number only other than 1 to stop entering more. Do not enter string





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