To review a few points made in Chapter 2, the CLDC provides definitions of programming interfaces and a virtual machine (VM) for MIDs. It is the foundation of the MIDP. For this reason, the JWT addresses the CLDC in the same general way that the MIDP addresses it. The CLDC is the foundation, and the JWT allows you to work with it. The JWT provides these tools, among others:
A host of device emulators on which to test your MIDlets.
An application profiler, which provides facilities to analyze method execution time and use frequency.
A memory tool that lets you see your application’s memory use.
A network monitor, which shows traffic across a simulated network (including tools to vary the simulated performance).
Speed emulation ...