java - Move circle around jpanel using keylistener - Stack Overflow
GitHub - salamander2/Swing-and-KeyListeners: Various useful ways of doing keylisteners in Swing.
KeyListener and Keyboard Events Another type of listener listens for keyboard entry – the KeyListener which generates KeyEvents –to implement KeyListener, - ppt download
GAME DEVELOPMENT TUTORIAL: DAY 2-3: Taking User Input - Kilobolt