Change: physics engine, which is based on Box2D developed by Erin Catto.
jbox2dCopyright (c) 2006-2007 Erin Catto http://www.gphysics.com Keyboard PollingThe keyboard polling code, which allows an application to determine whether a given key is pressed, uses the jinput package.jinputCopyright (c) 2003, Sun Microsystems, Inc., All rights reserved.
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