JDK is the Java Development Kit, A software development package from Sun Microsystems that implements the basic set of tools needed to write, test and debug Java applications and applets.
First we make sure that the backport repository is available in our sources.list
Use your favourite text editor to open up the sources.list.
Make sure the following two lines are not commented out (Commented out means that the line begins with a '#' character):
deb http://nz.archive.ubuntu.com/ubuntu/ edgy-backports main restricted universe multiverse deb-src http://nz.archive.ubuntu.com/ubuntu/ edgy-backports main restricted universe multiverse
If you also would like to install the Eclipse IDE, then make sure the universe repository is available on the sources.list file.
deb http://nz.archive.ubuntu.com/ubuntu/ edgy universe deb-src http://nz.archive.ubuntu.com/ubuntu/ edgy universe
Save the sources.list.
Now we need to update our list of available packages from the apt sources.
Now we download and install Java 1.6.
There is a fair bit to download so hopefully you are no longer using dial-up :) A few license agreements will pop-up, just choose OK.
Now that is done we need to make sure that we are using the correct version of java.
You will see a few alternatives. Select the option that has java-6-sun in the java path.
Now we will do the same thing for the compiler:
Once again select the alternative with java-6-sun in the path.
Start up eclipse with the command
Head to your workbench and then File --> New --> Project Choose java project. and click next.
Click configure JREs Click the add button and browse to /usr/lib/jvm Choose java-6-sun-1.6.0.00 (There may be some other symbolic links you can choose also) and click OK. Make sure that java-6-sun-1.6.0.00 has a tick next to it.
Good now we will set up the JDK compliance Level. Click the dropdown box next to the text compiler compliance level and choose 6.0. Click OK.