Java ME runtimes on Android (via J2ME Loader) or desktop (via MicroEmulator) have imperfect implementations of the javax.microedition.io package. A REPACK that relies on outdated socket calls may crash constantly or drain your battery.
It is a fascinating fossil, a brilliant piece of hackery, but for daily browsing, it is completely obsolete. For learning how mobile proxy architecture worked pre-iPhone, it is priceless. Opera Mini 4.5 Handler 2.jar REPACK
Opera Mini 4.5 Handler 2.jar REPACK is a repackaged version of the Opera Mini 4.5 web browser for Java-enabled mobile phones. The original Opera Mini 4.5 was a popular mobile browser known for its speed, security, and feature-rich interface. However, the repackaged version, Handler 2.jar REPACK, has been modified to provide additional functionality and fixes. Java ME runtimes on Android (via J2ME Loader)