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wireless world

 
Christophe Lee
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Can someone give me an overview of how J2ME (or other Java technologies) relate with the rest of the wireless world? ie. Bluetooth, WAP, WML, CDMA, GSM, SMSA, IMode, etc.
Except those books dedicated to J2ME, most of the wireless books only briefly skim J2ME and instead, talk about WAP and Bluetooth and GSM and IMode...and I have no idea how this relates to Java. Thanks.
 
Mark Herschberg
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CDMA, TDMA, GSM, etc are all wireless protocols, think of them like TCP, UDP, etc.
WAP/WML are the equivalent of HTTP/HTML (and, in fact, are derived from the latter).
Bluetooth is a shortrange wireless protocol, i.e. a LAN protocol.
J2ME and BREW are programming languages designed for small devices.
IMode, Jornada, iPaq, Palm, RIM, etc are all specific wireless devices.

--Mark
 
Thomas Paul
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And don't forget CLDC, CDC, MIDP, and PDAP.
------------------
Tom - SCJP --- Co-Moderator of the Programmer Certification Forums
 
Richard Taylor
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J2ME will give you the ability to produce your own applications for mobile devices. Its probably the biggest single enabler compared to the other technologies mentioned, because right now all you ever get on a phone is a phonebook, some weird ringtones and three games for children with 20/20 vision!
Seriously, J2ME isn't just for mobile phones, but that's certainly the major market, since everyone and their dog will own one within 5 years, if they don't already.
Think of the PC market in 1978, and that's about the equivalent of the mobile market right now - people will have programmable devices, and they don't yet know what they're going to do with them. Its up to us to guess, and write some ground-breaking apps to make that market work.
 
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