First Leap Integration App uses gestures to browse tweets
JDK 8 - I've used build 104 from http://jdk8.java.net Leap Controller & the dll/so/dylib files for your platform
Set your library path system property when running the app to point to the Leap Motion dll or dylib library. Eg -Djava.library.path=/Path/to/Project/TwitterLeap/leaplib
I've included the 1.0 release of the Mac dylib but if on Windows / Linux please download the Leap SDK from http://developer.leapmotion.com and drop in the relevant 32 or 64 bit dll files (or Linux .so equivalent) in this folder.
See https://developer.leapmotion.com/documentation/Languages/Java/Guides/Sample_Java_Tutorial.html for more info