Add Java support to Eclipse

You should be able to install the JAVA components, using Help > Install New Software.

In the list of components, there should be Programming Languages > Eclipse Java Development Tools.

Here's a screenshot :

   
_{(source: pascal-martin.fr)}

On my version of eclipse:

Help menu->install new software

Choose the download page for your version of eclipse

There is a category "programming language" which should have Java.

Because it is so trivial to have multiple Eclipse instances, I do just that to seperate php and java environments. This reduces the plugins loaded and you can somewhat keep Eclipse lean. Of course the choice is totally yours.