code: public static long getCheckSumCRC32(final byte[] bytes)
  	{
  		final Checksum checksum = new CRC32();
  		checksum.update(bytes, 0, bytes.length);
  		final long cs = checksum.getValue();
  		return cs;
  	}
docs: Gets the checksum from the given byte array with an instance of.
  
  @param bytes
  The byte array.
  @return The checksum from the byte array as long. {@link java.util.zip.CRC32} object.