Getting bytes from the bytes array

Hi Friends,
I receive data from the server and I store it in a bytes array.Now I need to retrieve bytes from the array,like first byte says code[1 byte],second says lastname[4 bytes],third says fname[30 bytes],last byte says if there is one more entry,and the same syntax needs to be followed again....I tried this but its not working...any help would be appreciated.


import java.io.*;
import java.nio.*;
 
public class btest{
public static void main(String[] ar){
 try{
 
                String data1 ="1232 3 3 444 222 111 444 555555 2222222 1111111 3333 dssssddd";
                byte[] data = data1.getBytes("ASCII");
            int length = data.length;
            System.out.println("length is:"+length);
            ByteBuffer buff = ByteBuffer.wrap(data);
 
            byte[] fbyte = new byte[1];
            byte[] lname = new byte[4];
            byte[] fname = new byte[30];
            byte[] lbyte = new byte[1];
            
            buff.get(fbyte, 0,1);
            String received0 = new String(fbyte,"ASCII");
                System.out.println("Data Recd: " + received0);
            buff.position(1);
            
            buff.get(ref_no, 1,4);            
            String received1 = new String(lname,"ASCII");
            buff.position(4);
 
            buff.get(uname, 4,34);
              String received2 = new String(fname,"ASCII");
                System.out.println("Data Recd: " + received2);
            buff.position(34);
 
            buff.get(lbyte, 34,35);
            String received3 = new String(lbyte,"ASCII");
                System.out.println("Data Recd: " + received3);
 
}catch(Exception e){e.printStackTrace();}
 
}
}