JBOX2D 是一款很好的JAVA 物理引擎。用于解决java 使用物理引擎的问题。-JBox2D is a close Java port of Erin Catto s excellent C++ Box2D physics engine. Check out the demos to see what it can do.This project has been led by dmurphy (toucansam in the forums) since mid 2010. It was