Robert Lougher wrote: > Hi, > > J2ME is split into two things, the VM specification and the profile. > MIDP is the profile, not the VM. The VM follows either the CDC > specification (Connected Device) or the CLDC specification (Connected > Limited Device). Here again, we now have two versions, 1.0 and 1.1 > (CLDC1.1 is specified in JSR 139). > > Most phones were originally CLDC1.0/MIDP1.0. However, newer devices > are all MIDP2.0. CLDC 1.0 was integer only, but 1.1 supports > floating-point. It also supports weak references -- this is a subset > of the J2SE weak reference classes, so the gap is getting smaller.
So you'd want to target MIDP2.0 for an implementation, and everything for a development environment and emulator, as MIDP1.0 phones are still on sale and will be used for years to come. I found this paper on the virtual machine... looks like they are doing/trying to do JIT: http://java.sun.com/products/cldc/wp/CLDC_HI_WhitePaper.pdf -- David N. Welton - http://www.dedasys.com/davidw/ Linux, Open Source Consulting - http://www.dedasys.com/
