Java Football Game !free! 〈FRESH · Collection〉
If you want to scale this prototype into a full desktop production application, consider moving from Java Swing over to JavaFX or the lightweight framework LibGDX to utilize hardware-accelerated rendering pipelines.
Here is a compact, runnable example using Swing. This creates a window where you control a blue player (WASD) and try to kick a red ball into the green goal zone. java football game