JBullet - Java port of Bullet Physics Library

Base library

com.bulletphysics	Contains global variables and callbacks.
com.bulletphysics.linearmath	Vector math library.
com.bulletphysics.linearmath.convexhull	Convex Hull library for converting point clouds to polygonal representation.
com.bulletphysics.util	Java-specific utility classes.

Collision library

com.bulletphysics.collision.broadphase	Broadphase collision code for fast determining of overlapping pairs.
com.bulletphysics.collision.dispatch	Dispatching code for collisions between various shapes.
com.bulletphysics.collision.narrowphase	Narrow-phase collision.
com.bulletphysics.collision.shapes	Collision shapes.

Dynamics library

com.bulletphysics.dynamics	DynamicsWorld and RigidBody.
com.bulletphysics.dynamics.constraintsolver	Constraints and solvers.
com.bulletphysics.dynamics.character
com.bulletphysics.dynamics.vehicle

Extras

com.bulletphysics.extras.gimpact

Provides support for moving concave triangle meshes.