What is exactly is J2ME?

From what i understand, WAP is a protocol that is established for the way in which wireless technology is used for Internet access and WAP pages are written in WML language.
Mobile phone ----> WAP gateway ----> Web Server ----> Database
(WML pages)
So, is J2ME a protocol or what? Or is it just for creating midlets program and runs the same way as WML pages? If so, why are they saying J2ME will or might replace WAP.
Can someone please explain this to me.
Blaise,

The Java 2 Platform, Micro Edition (J2ME) was developed specifically to address the vast consumer space of small devices, ranging from smart cards to pagers. This space, with its limited memory and display constraints, has proved to be an ideal environment for Java. It might make sense to state up front what it is not, and that is a replacement for WAP. Those who follow this space will quickly agree that, instead of looking at it as a WAP competitor, J2ME should be looked at as a complementary technology used to further expand the usefulness of wireless access and applications.As you mentioned, WAP is a browser technology that allows users to browse WAP-enabled Web sites. Unfortunately, although useful in what it does, it does have a few shortcomings, including security and the fact that it requires constant airtime for stand-alone or offline operations. When coupled with J2ME, however, users will now be provided with a full-featured Java-based application environment from which to enhance their experience. What makes it especially appealing is the fact that implementation is as easy as having your users download the application via their standard WAP browser.
Furthermore, by employing this type of technology, users will no longer be restricted to the limited monochromatic interfaces seen on WAP devices today, but rather we will enjoy full-color, animated graphics and applications that are much easier to navigate. Once a Java application has been stored on a handset, it can then exchange data with backend information systems using the existing WAP infrastructure. With that said, users will also be happy to know that applications developed with J2ME are upwardly scalable to work with the Java Platform, 2 Standard Edition (J2SE) and the venerable Java 2 Platform, Enterprise Edition (J2EE) with little rework required.

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