java -jar mygame.jar Your game should now run at a resolution of 320x240.
public class GameWindow extends Application { private GameLogic gameLogic; java game jar 320x240
gameLogic = new GameLogic(); AnimationTimer timer = new AnimationTimer() { @Override public void handle(long currentTime) { gameLogic.update(currentTime); } }; timer.start(); java -jar mygame
For this example, we'll use JavaFX, a popular and versatile library for building GUI applications, including games. If you're using a different library, the steps may vary. gameLogic = new GameLogic()