Most often the CLDC uses the K virtual machine, which is suitable for devices with 16/32-bit RISC/CISC microprocessors/controllers, and with as little as 160 K of total memory available -- 128 K of which is for the storage of the actual virtual machine and libraries themselves.

CLDC reference implementation and KVM runs on Windows 98/NT, Solaris, and Palm platforms. Developers can access binary releases of the CLDC, or they can get the full release by signing legal forms from Sun.