If you still own a Nokia E63, Sony Ericsson K750, or BlackBerry Bold (which supported 320x240 Java apps), transfer the Jar via Bluetooth OBEX or a USB cable in "Data Transfer" mode. Install it directly to the phone’s memory.
If you want the but on modern systems:
For a generation of mobile gamers, the phrase isn't just a file name or a technical specification. It is a spell that summons memories of bus rides, boring math classes, and the adrenaline rush of a puzzle platformer that fit inside a 500-kilobyte wrapper. Diamond Rush 320x240 Jar
Because the game was distributed via JAR files on shady websites (like Dedomil , MobiGamez , or GetJar ), players became amateur data hoarders. A 512MB memory card could hold hundreds of JAR games, but Diamond Rush never left the root folder. If you still own a Nokia E63, Sony