There is a lot of interest in creating applications for the Wireless market. Currently there are a few ways to do this. The Wireless Application Protocol (WAP) is one, and another is to use the Mobile Information Device Profile (MIDP). With either WAP or MIDP, the Java programming language plays an important role. In WAP, Java Servlets and Java Server Pages (JSPs) can be used to generate Wireless Markup Language (WML) pages dynamically, and in MIDP, applications (also called MIDlets) are written in the Java programing language. This presentation discusses both technologies, the advantages and disadvantages of each, and when to use what.