org.jbox2d.dynamics.contacts
Interfaces 
ContactCreator
Classes 
ChainAndCircleContact
ChainAndPolygonContact
CircleContact
Contact
ContactEdge
ContactPositionConstraint
ContactRegister
ContactSolver
ContactSolver.ContactSolverDef
ContactVelocityConstraint
ContactVelocityConstraint.VelocityConstraintPoint
EdgeAndCircleContact
EdgeAndPolygonContact
PolygonAndCircleContact
PolygonContact
Position
Velocity