public static long checksumCRC32(File file) throws IOException {
  CRC32 crc=new CRC32();
  checksum(file,crc);
  return crc.getValue();
}

public static long checksumCRC32 ( File file ) throws IOException { CRC32 crc = new CRC32 ( ) ; checksum ( file , crc ) ; return crc . getValue ( ) ; }
computes the checksum of a file using the crc32 checksum routine . the value of the checksum is returned .
