Does it help reduce disk footprint of Java applications?
Yes, of course. For instance, look at disk space occupied by the installed sample applications listed above: Application Disk Footprint Description JavaCC 13.1 MB Parser generator for use with Java SWTDemo 14.4 MB Sample with SWT controls RSSOwl 33.4 MB RSS/RDF/Atom Newsreader PowerFolder 33.4 MB Tool to synchronize files between PCs TuxGuitar 31.1 MB Guitar tablature editor and player. Sun JRE 5.0 Update 13 69.6 MB Included for reference, not required to run the other applications. Sun JRE 6 Update 15 79.2 MB Included for reference, not required to run the other applications. As you may see, the disk footprint of the optimized applications is much smaller that the footprint of the JRE alone.