With the advent of the Java 2 Micro Edition platform, developers have the ability to develop Java based mobile applications that benefit from features such as device independence, and memory abstraction. However, applications also inherit many limitations such as slow execution, and excessive memory usage that impact on overall application performance and usability. The aim of this paper is to present and evaluate six known optimisation techniques for improving the performance and usability of Java based mobile applications. Some of these techniques are dependent on features provided within the IBM WebSphere Studio Device Developer IDE. A real life multi-agent based mobile application is presented to demonstrate the performance and usability improvements that have been gained through applying these optimisation techniques.
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