I also asked sun mirco
This is their reply to me
The article you're referring to is a bit outdated. To write Java for Palm,
you're advised to download the MIDP for PalmOS now. The early access version
is available from:
http://java.sun.com/products/midp/palmOS.html
The CLDC 1.0.2 release doesn't provide the overlay package anymore. You can
also find this information from the ReleaseNotes.pdf file included in your
downloaded file.
But MIDP is categorized "early access" and the size of file midp.prc 536k (quite large). I really wonder how can it used to develop application on palm.
I'm new to palm and J2ME. Now, I think GCC for Palm would be a better choice at this moment.