Drag all the files from your [Install Dir]/PC/[build version]/lib directory into the root of the project. (where [Install Dir] is the directory chosen during the installation process, and [build version] corresponds to the desired build)
Right click on the project, and select "Build Path > Configure Build Path..."
Select the "Libraries" tab
Click the "Add JARs..." button
Locate the jars you just added in your project, and click "OK"
Click "OK" to exit the dialog
Make sure the dlls are in the Java native library path. (Usually the root or /lib of your Java project)