From Forum Nokia Wiki

Mobile Information Device Profile (MIDP) is a specification published for the use of Java on embedded devices such as mobile phones and PDAs. MIDP is part of the Java Platform, Micro Edition (Java ME) framework and sits on top of Connected Limited Device Configuration (CLDC), a set of lower level programming interfaces.

There are two versions in the market:

• MIDP 1.0
• MIDP 2.0

In the near future a new implementation will be realeased as MIDP 3.0