Java 2 Platform Micro Edition (J2ME), released in 1999 and formalized in 2001, revolutionized mobile gaming by bringing playable games to billions of feature phones worldwide. As a stripped-down Java version optimized for resource-constrained devices, J2ME enabled developers to create "MIDlet" applications that ran on a wide variety of phones. At the 2001 JavaOne conference, Sega's Sonic the Hedgehog made a key demonstration, proving fast-paced action games could run on mobile devices. In 2002, the platform gained widespread adoption through phones like the Nokia 3410 and Siemens M50, free for developers and easy to use. Major publishers including Gameloft, Fishlabs, and EA Mobile released over 3,000 games between 2000 and 2016.