FileObjects are virtual files which live inside a FileSystem. They may represent a file on disk - or anything else walks and talks like a file, or can be made to - such as a file on a remote FTP server, a file entry in a JAR file, an entry in an XML file, etc.

FileObjects differ from in certain ways:

They are part of the Filesystems API; the javadoc for FileObject can be found here.

Source: NetBeans FAQ

Parent Category: Other API Tips