THE CONNECTED DEVICE CONFIGURATION AND THE FOUNDATION PROFILE

Much of what's been written about Java 2 Platform, Micro Edition (J2ME) talks about the Connected Limited Device Configuration, or CLDC for short. The CLDC defines an extremely small subset of the Java Platform for very limited devices -- devices, like cellular telephones, that do not have enough memory or enough processing power to handle a full-blown Java implementation. There is, however, another configuration available that is midway between the CLDC and a full Java 2 Platform, Standard Edition (J2SE) implementation: the Connected Device Profile, or CDC for short.

The CDC defines a much less radical subset of J2SE. Unlike the CLDC, which is aimed at devices with less (often much less) than 512K bytes of total available memory, the CDC requires devices to have at least 2 megabytes of total memory available for Java. This can be a combination of read-only and read-write memory. The Java virtual machine (VM) and core class libraries are likely to be stored in read-only or flash memory.

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