Well java has an installer
Euhm, it doesn't? Not on Linux anyway (I see a choice of a tarball and a rpm-file on the Java site). Netbeans has one though and the only thing it does is make you accept an EULA and then extract the thing to the specified folder, easier and faster with just "tar"...
Also Oracle is a pretty good example of a company that doesn't get it (see the Open/LibreOffice split, the Hudson/Jenkins split,...)
