FileChannel fc;
 int  BUFFER_SIZE =  1024 ;
SocketChannel sc;

..... 

   long  bytesSent = fc.transferTo( 0 , BUFFER_SIZE, sc);
   System.out.println("."+bytesSent+" bytes sent");
   fc.position(bytesSent);
   Thread.sleep( 1 );
    while  (bytesSent >  0 ) {
    bytesSent = fc.transferTo(fc.position(), BUFFER_SIZE, sc); 
   System.out.println("."+bytesSent+" bytes sent");
    fc.position(fc.position()+bytesSent); 
   Thread.sleep( 1 );
   }

   FileOutputStream fos =  new  FileOutputStream(fileName);
   FileChannel fc = fos.getChannel();
    long  receivedBytes = fc.transferFrom(channel,  0 , BUFFER_SIZE);
   fc.position(receivedBytes);
    while  (receivedBytes >  0 ) { 
   receivedBytes = fc.transferFrom(channel, fc.position(), BUFFER_SIZE);
   fc.position(fc.position()+receivedBytes);
     try  {
     Thread.sleep( 100 );
    }     catch  (InterruptedException e) { 
    e.printStackTrace();
    }
   }