Wireless Java is still in its infancy in terms of maturity. Currently, only a handful of J2ME implementations are available as early final releases (1.0 or greater). This is the area in the Java specification that's expected to have continued slow but steady growth for at least the next two years. Later this year and in early 2003, expect to see much more wireless Java integrated and/or used with the J2EE platform and Java Web Services Developer Pack (WSDP). J2ME vendors are currently adopting Web services as part of their J2ME implementations. Also, watch Jini as it continues to evolve for device handling over time. Current versions promise to be much more secure; therefore, look for J2ME vendors and implementors to either adopt this and/or Bluetooth as part of a wireless Java networking paradigm.
Wireless computer will have great development in the future for sure. However, wireless java programming MAY not as good as expected, because currently most phone company trend to release non-portable API, like com.nokia.* and com.motoria.*, for their special hardware; rather than working on open JCP standard for mobile phone.
There is certainly growth in this area, where MIDP (the profile for mobile information devices) version 1 is an immature product that has only been implemented by a few vendors, MIDP version 2 is a giant leap forward and will be supported by all players in the field. It is true that many vendors roll their own optional packages, MIDP 2 will allow for such packages while not breaking with the spec. The MIDP 2 spec has been approved and an implementation can be expected somewhere next year.
Although I would love to see Jini on MIDP devices I am not sure whether that will happen with version 2. RMI will be needed for that (practically speaking) but it that is not an part of the standard implementation of MIDP 2.
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