Platform independence is the major advantage of the Java programming language. Whereas Java is widespread on servers, desktop computers and mobile phones. In contrast, PDA and Pocket PC applications are usually based on C or C# applications in the .NET Compact Framework. The paper focuses on the J2ME standard and its suitability for Pocket PCs and PDA. In that context we also give an overview of existing Java Virtual Machines (JVMs). In particular we evaluate Esmertecs Jbed CDC, IBM Websphere Everyplace, Creme and MySaifu and compare them according to functional criteria as well as standard conformance and performance. Furthermore a set of tests to benchmark these different JVMs is given. Finally, An example application is implemented, as part of the Bosporus project, to evaluate the JVMs from the programmers perspective.
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