JBox2D is a close Java port of Erin Catto's excellent C++ Box2D physics engine. Check out the demos below to see some examples of what it can do.
MC4J is a project to create management software for J2EE application servers and other Java applications. It is designed to utilize the JMX specification to connect to and introspect information within supported servers and applications. It provides the ability to browse existing managed beans (MBeans), update configurations, monitor operation and execute tasks.
Code Examples from the Java Developers Almanac 1.4
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