returns the lowercase file extension for a specified file . concode_field_sep String BIT_BUCKET_WIN concode_elem_sep String BIT_BUCKET_UNIX concode_elem_sep Logger LOGGER concode_field_sep File createTempDirectory concode_elem_sep File getTempFile concode_elem_sep String getBitBucket concode_elem_sep boolean delete concode_elem_sep void close
String function ( String arg0 ) { final String loc0 = FilenameUtils . getExtension ( arg0 ) ; return null == loc0 || loc0 . isEmpty ( ) ? null : loc0 . toLowerCase ( ) ; }