public void printHeader()
	  {
	    for (int i=0; i < (HEADER_SIZE-4); i++)
	      {
		for (int j = 7; j>=0 ; j--)
		  if (((1<<j) & header[i] ) != 0)
		    System.out.print("1");
		else
		  System.out.print("0");
		System.out.print(" ");
	      }

	    System.out.println();
	  }