How to append/merger 2 byte[] ?

Question

is there a better (faster) way to append 2 byte[] ? (other then using System.arrayCopy and loop)
for example
String s = "just a text";
File f = new File("c:a.exe");
BufferedInputStream bis = new BufferedInputStream(new new FileInputStream(f));
byte[] b2 = new byte[f.length()];
bis.read(b);
byte[] b1 = new byte[s.getBytes().length()];
b1 = s.getBytes();How to append/merger b1 and b2 (using better/faster way)?

Answer 1

actually i want upload a file via socket, but before it is sent, i want add an headerCode to the bytearray
this is snip of my code
public boolean runUpload(String  filetoUpload , JProgressBar progressBar){
          try {
            int MAX_UPLOAD_BYTE = 1024*10;
            File f = new File(filetoUpload);
            SocketInfo socketinfo  = new SocketInfo();
            Socket socket = new Socket(socketinfo.Host, socketinfo.HostPort);
            //Socket socket = new Socket(InetAddress.getLocalHost(), 8080);
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            BufferedOutputStream out = new BufferedOutputStream(socket.getOutputStream());
            FileInputStream fs = new FileInputStream(f);
            BufferedInputStream bis = new BufferedInputStream(fs);
            long size = f.length() ;
            long uploaded = 0;
            int progres = 0;
            String ss = "headerCode";
            byte[] buffer = new byte[MAX_UPLOAD_BYTE-ss.getBytes().length];
            byte[] trans_buffer;
            int len = 0;
                while ((len = bis.read(buffer)) != -1) {
                    trans_buffer = new byte[MAX_UPLOAD_BYTE];
                    System.arraycopy(ss.getBytes(), 0, trans_buffer, 0, ss.getBytes().length);
                    System.arraycopy(buffer, 0, trans_buffer, ss.getBytes().length, len);
                    //transferLen = len + ss.getBytes().length;
                    out.write(trans_buffer, 0, len+ss.getBytes().length);
                    //out.write(trans_buffer, 0, MAX_UPLOAD_BYTE);
                    out.flush();
                    uploaded +=len;
                    progres = (int)Math.ceil(((double)uploaded/(double)size) * 100);
                    System.out.println("#" + (len+ss.getBytes().length));
                    progressBar.setValue(progres);
                    trans_buffer = null;
                System.out.println("lennnn" + len);   
                bis.close();
                out.close();
                socket.close();
            return true;
        } catch (IOException ex) {
            Logger.getLogger(UploadFiles.class.getName()).log(Level.SEVERE, null, ex);
            return false;
    }