import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

public class Sorting {

public static void main(String[] args) {

   // The program shall graphically prompt the user for a file.
   JFileChooser fc = new JFileChooser();
   int result = fc.showOpenDialog(null);

   if (result != JFileChooser.APPROVE_OPTION) {
         System.exit(0);
   }
   File input = fc.getSelectedFile();

   try {
         int[] arr = readFile(input);
         /**
         * The program shall sort the values it reads from the file from
         * largest to smallest.
         */
         sort(arr, arr.length);

         String outputFileName = JOptionPane.showInputDialog(null,
               "Enter name of output file", "Output File Name",
               JOptionPane.QUESTION_MESSAGE);
         String outputPath = input.getParent()
               + System.getProperty("file.separator") + outputFileName;
         writeFile(outputPath, arr);


         /**
         * The program shall write the values to an output file from largest
         * to smallest in the same directory as the input file.
         */
   } catch (Exception e) {
         System.out.println(e.getMessage());
   }

}

public static void writeFile(String path, int[] arr) throws IOException {
   FileWriter fw = new FileWriter(path

Description An exactly-once service will guarantee a clientâ€™s re...