Since official support for Java mobile games has ended, you can find archived JAR files on these community-driven sites: : Features a massive list of Super Mario Bros. versions specifically optimized for the 240x320 resolution. SourceForge : Hosts open-source Super Mario Bros. Java projects that can be downloaded as JAR files.
If you don't have an old Nokia or Sony Ericsson, you can still play these JAR files using emulators: super mario bros java game 240x320 free
: Ensure the file description explicitly mentions "240x320" to avoid the game appearing too small or being cut off on your screen. Super-Mario-Bros-Java download | SourceForge.net Since official support for Java mobile games has
: When launching a game in J2ME Loader, you can manually set the resolution to 240x320 to ensure the graphics aren't stretched or blurry. Java projects that can be downloaded as JAR files
You can use emulators like KEmulator to run Java games with full keyboard support.