private static int decode ( final int hex ) { if ( hex >= CcHex . BACK . length ) { throw new DecodingException ( String . format ( "invalid hex char: 0x%2x" , hex ) ) ; } final int dec = CcHex . BACK [ hex ] ; if ( dec < 0 ) { throw new DecodingException ( String . format ( "invalid hex character: 0x%2x" , hex ) ) ; } return dec ; }
Convert hex to number .