import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.layout.StackPane; import javafx.stage.Stage;

Before the iPhone revolutionized touchscreens and the Google Play Store overflowed with millions of apps, there was a different kind of mobile gaming empire. It ran on a technology called Java ME (Micro Edition), and its visual sweet spot was a resolution of .

Java, in this context, refers to Java Platform, Micro Edition (J2ME). Unlike the Java you might find on a desktop computer, J2ME was a stripped-down version designed for devices with limited processing power, little memory, and small screens. It was the lingua franca of feature phones. Almost every phone brand—Nokia, Motorola, LG, Sony Ericsson, BlackBerry—supported J2ME.

In this write-up, we'll guide you through the process of creating a Java game JAR file that runs at a resolution of 320x240. We'll cover the essential steps, from setting up your development environment to packaging your game into a runnable JAR file.