Request file to be received (part of Client.java)

 public void FileRequest() throws FileNotFoundException
 {
        try
        {
            ///
             output2 = new DataOutputStream(socket.getOutputStream());
             input = new DataInputStream(socket.getInputStream());
             System.out.println("Which file do you want?");
             Scanner scanner = new Scanner(System.in);
             String thisFileName = scanner.nextLine();
             System.out.println("99877");
             if(thisFileName!=null && !thisFileName.isEmpty())
             {
                 System.out.println("666332");

                 System.out.println("69683721");
                 output2.writeUTF(thisFileName + "`" + "\n");
                 System.out.println("1234123456666");
                 output2.flush();
                 System.out.println("flushed");
                 long file_size= input.readLong();
                 System.out.println("The file size is: " + file_size);
                 if ( file_size == 0 )
                 {
                     System.out.println("File size is 0");
                 }
                 FileOutputStream file_out= new FileOutputStream( thisFileName );
                 System.out.println("4445555");
                 int number_read;
                 byte[] buffer= new byte[1500];
                 System.out.println("23234");
                 while( (number_read= input.read( buffer)) != -1 )
                 {
                     file_out.write( buffer, 0, number_read );
                     System.out.println("66333");
                 }
                 System.out.println("45531");
                 System.out.println("File " + thisFileName  + " downloaded (" + number_read + " bytes read)");
                 System.out.println("123411");
                    StandardInput();
                }


        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
}