This tut will allow you to install a java environment that will allow you to run apps on your firefox/konqueror.

We will now install the following Java packages
sun-java6-bin - Contains the binaries
sun-java6-demo - Contains demos and examples
sun-java6-doc - Contains the documentation
sun-java6-fonts - Contains the Lucida TrueType fonts from the JRE
sun-java6-jdk - Contains the metapackage for the JDK
sun-java6-jre - Contains the metapackage for the JRE
sun-java6-plugin - Contains the plug-in for Mozilla-based browsers
sun-java6-source - Contains source files for the JDK

Installing the Java Runtime Environment

1) In terminal, enter the following command:
Code:
sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts
2) Once it downloads the packages and begins the installation, you’ll get a screen that contains the Sun Operating System Distributor License for Java and hit Enter to continue. You’ll see a dialog that asks you if you agree with the DLJ license terms. Select Yes, and hit Enter; the JRE will finish installing.


Aftermath:


First, check that the JRE is properly installed by running the following command from a terminal.
java -version
You should get similar output
java version “1.6.0″
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)

Making sure java works on Firefox:

Open Firefox and type
Code:
about:plugins
in the address bar and check for java plugin.

Making sure Java works on Konqueror

Go to any website that uses a java applet and see if it runs. If it doesn't run, click
Code:
Tools
in the Konqueror top bar, go to
Code:
HTML Settings
and make sure the "Java" option is ticked.


Feel free to post any questions.