The most popular way to play these today is through the J2ME Loader on GitHub, which benefits significantly from repacked files that have optimized manifests.
Old JARs used MIDI (mid) sounds that modern audio drivers struggle with. Repacks often convert these to embedded WAV or patch the Java code to use the correct audio pipeline. jar games repack
Playing Java games on Android feels incredibly authentic because you are still using a handheld, touchscreen device. Download a JAR games repack to your phone and extract it. The most popular way to play these today
Look for repacks on dedicated preservation subreddits, specialized archive sites, or long-standing emulation forums rather than random, ad-heavy download blogs. Conclusion specialized archive sites