primaryStage.show(); }

Create a new Java class (e.g., GameWindow.java ) and add the following code:

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.

// Update game state here System.out.println("Game updated at " + currentTime); } }

java -jar mygame.jar Your game should now run at a resolution of 320x240.

Create a new Java class (e.g., GameLogic.java ) and add your game logic. For example:

import javafx.animation.AnimationTimer;