Forget the x86 version.
Get the 64bit version from here:
http://labs.adobe.com/downloads/flashplayer10.html
Save it to your /home directory.
Uncompress the file,and you will be left with a file libflashfplayer.so
cd to ~/.mozilla.
mkdir plugins
copy libflashplayer.so to the plugins directory in ~/.mozilla.
Check it is installed by typing about
lugins at the browser address bar.
The flashplugin should be listed if all went well.
As for java i use the Icedtea plugin:
aptitude install icedtea-gcjwebplugin
Any problems,post back.
Regards.
The trooper.