Client - Server data transfer by size fixed

Sender

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Socket sock = new Socket("127.0.0.1",1326);
            File myFile = new File ("./encryp.txt");
            byte [] mybytearray  = new byte [(int)myFile.length()];
            FileInputStream fis = new FileInputStream(myFile);
            BufferedInputStream bis = new BufferedInputStream(fis);
            bis.read(mybytearray,0,mybytearray.length);
            OutputStream os = sock.getOutputStream();
            os.write(mybytearray,0,mybytearray.length);
            os.flush();
            sock.close();

Reciever

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int filesize=6022386;
            long start = System.currentTimeMillis();
            int bytesRead;
            int current = 0;
            ServerSocket servsock = new ServerSocket(1326);
            Socket sock = servsock.accept();
            byte [] mybytearray  = new byte [filesize];
            InputStream is = sock.getInputStream();
            FileOutputStream fos = new FileOutputStream("C:/AJs PC/"+nam+".txt");
            BufferedOutputStream bos = new BufferedOutputStream(fos);
            bytesRead = is.read(mybytearray,0,mybytearray.length);
            current = bytesRead;
            do {
                bytesRead = is.read(mybytearray, current, (mybytearray.length-current));
                if(bytesRead >= 0)
                    current += bytesRead;
            } while(bytesRead > -1);
            bos.write(mybytearray, 0 , current);
            bos.flush();
            long end = System.currentTimeMillis();
            System.out.println(end-start);
            bos.close();
            sock.close();