Installing Java under Ubuntu
By default, Firefox does not come with Java.
Solution:
Open a terminal (
Application Menu/ Accessories/ Terminal) and type in:
sudo aptitude install sun-java6-jre sun-java6-plugin
or
sudo aptitude install sun-java5-jre sun-java5-plugin
Enter your password if prompted.
A license window will appear: Press
TAB and then
ENTER.
If a question is asked, answer "yes" (using the arrow keys and the
ENTER key).
Conclusion:
You should now be able to run Java programs and see Java applets in the Firefox browser.