For the uninitiated, JAR (Java Archive) is the file format for Java ME (Micro Edition) applications. This was the "APK" of its day. Installing Diamond Rush meant:
The beauty of JAR files was their universality. A Diamond Rush 320x240.jar file would work on a Nokia N73, a Sony Ericsson W810i, or a Motorola RAZR, provided the screen resolution matched. Diamond Rush 320x240 Jar
Q: My downloaded “320x240” JAR looks stretched – player too big or cropped?
A: It’s probably a 176x220 version repackaged. Search for a real 320x240 landscape release (often named DiamondRush_320x240.jar or DiamondRush_SE_K800.jar). For the uninitiated, JAR (Java Archive) is the
Q: Game runs but controls don’t work in emulator?
A: Remap keys: usually Directional + key 5 for action. In KEmulator, check Options → Key mapping. The beauty of JAR files was their universality
Q: Saves lost after closing?
A: Emulators like J2ME Loader keep RMS data if properly configured. In KEmulator, RMS is saved in a .rmsdb file.
Q: Any level editor for this version?
A: Unofficial – some fans reverse-engineered level format, but no simple GUI editor. The official only existed in Gameloft’s internal tools.
If unavailable, explore these retro Java games on the Internet Archive or emulators:
