Java check-for-update function.

UpdateCheck.java

import java.awt.*;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import javax.swing.*;


public class UpdateCheck
{
  public static void main (String[] args) throws ClassNotFoundException

    {
        String userHome = System.getProperty("user.home");
        String VersionFileLink = "Link here";
        String DownloadFileLink = "Link here";

        try
     {  long startTime = System.currentTimeMillis();

        System.out.println("Checking for Update...");

        URL url = new URL(VersionFileLink);
        url.openConnection();
        InputStream reader = url.openStream();
        FileOutputStream writer = new FileOutputStream(userHome + "/Downloads/.version");
        byte[] buffer = new byte[153600];
        int totalBytesRead = 0;
        int bytesRead = 0;
        while ((bytesRead = reader.read(buffer)) > 0)
        {
           writer.write(buffer, 0, bytesRead);
           buffer = new byte[153600];
           totalBytesRead += bytesRead;
        }

        long endTime = System.currentTimeMillis();

        System.out.println("Update Check Complete.\nSaved to "
                + userHome
                + "/Downloads/.version\n"
                + (new Integer(totalBytesRead).toString())
                + " bytes downloaded:\n ("
                + (new Long(endTime - startTime).toString())
                + " millseconds).\n");
        writer.close();

        File updateFileSource = new File(userHome + "/Downloads/.version");
        String updateFile = new String(Files.readAllBytes(FileSystems.getDefault().getPath(userHome + "/Downloads/.version")));
        int version = 0;
        int update = (int) Double.parseDouble(updateFile);
        if (version == update){
             System.out.println("This version is up to date!");
            }

        else if(version < update){

             System.out.println("An update is available!");
             JOptionPane.showMessageDialog(frameMain, "An Update is Available!");
        }

        else if(version > update){

             System.out.println("Back... TO THE FUTURE!!!!");
             JOptionPane.showMessageDialog(frameMain, "ಠ_ಠ\nDon't edit that file!");
            }

        reader.close();
        updateFileSource.delete();
        System.out.println("Version code file deleted.");

     }
     catch (MalformedURLException t)
     {
        System.err.println("What happened? I think there was a disk error!");
     }
     catch (IOException r)
     {
        System.err.println("Great Scott! An error!");
     }