Installing Java for my Xubuntu Firefox

Xubuntu 9.04, Firefox 3.5.8
But Java won't run in my browser for my favorite hearts game on the Web.
In the terminal window:

java -version

shows -

java version "1.6.0_0"
OpenJDK Runtime Environment (IcedTea6 1.6.1) (6b16-1.6.1-3ubuntu1)
OpenJDK Client VM (build 14.0-b16, mixed mode, sharing)

sudo update-java-alternatives -l

shows -

java-6-openjdk 1061 /usr/lib/jvm/java-6-openjdk

To run Java applets in OpenJDK, I had to install this plugin:

sudo apt-get install icedtea6-plugin

Restarted the browser, and I'm done. Java applet now working.
Reference: Ubuntu Forums thread