ts.util.file
クラス 
DirectoryEmptyFilter
FileFilterGroupAnd
FileFilterGroupOr
FileFilterNot
FileLastModifiedFilter
FileNameRegexFilter
FileNewerThanTargetFilter
FileOperation
FilePathPatternFilter
FileSizeFilter
FileTypeFilter
列挙型 
FileType
例外 
DirectoryNotEmptyException
FileAlreadyExistsException