Notices

Thank you my hero

did not work java: not found
this package does not work it has to be another

What link were you using?
ln -s /opt/ejre1.6.0_21/bin/* /usr/bin/
or
ln -s /opt/ejre1.6.0_27/bin/* /usr/bin/
?

I think that package and not working out ta have to be 21 and not 27

Just tried the Java installation part.
I get in terminal window as normal user:
java -version
:
java version "1.6.0_27"
Java(TM) 2 Runtime Environment, Standard Edition for Embedded (build 1.6.0_27-b07)
Java HotSpot(TM) Client VM (build 20.2-b06, mixed mode)

Of course you have to link the correct directory:
ln -s /opt/ejre1.6.0_27/bin/* /usr/bin/

For Java in the browser:
http://talk.maemo.org/showpost.php?p...&postcount=308
but I did not try this.

Maybe I'll test jDownload later on.

It appears this error

Did you install wget and open a reasonable internet connection for downloading?

The instruction:
"At this point it will commence the install, this can take some time and will open a Java GUI window for downloading files, let it finish, once complete jDownloader should start."

The "JD Update" window starts and downloads a lot of stuff from
update4.jdownloader.org.

jDownloader is working afterwards on my N900.
I can also use the config from my Linux desktop.

Now this error

Works like a charm thanks

Ok, but you should sort out your problem with hildon!
Otherwise you might have problems in the future...
;-)