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MIDP on Palm Zire 31

Gregg Bolinger
GenRocket Founder
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Joined: Jul 11, 2001
Posts: 15286
    
    6

I got a Zire 31 yesterday and today I installed the MIDP 1.0 VM on it with no problems. I also installed a few demo apps and I would like to do some programming for it.

However, I noticed that my up/down/left/right controls, only the up and down work. The left and right don't do anyting. But only in the Java programs. Everywhere else on the OS they all work fine.

I am running Palm OS v. 5.2.8. I am wondering if I have the correct VM or if I need to grab something different that I need?

Thanks.


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Gregg Bolinger
GenRocket Founder
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Joined: Jul 11, 2001
Posts: 15286
    
    6

Is MIDP 1.0 the one I want. I can't find a 2.0 VM to download like I did the 1.0 version.
Michael Yuan
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Joined: Mar 07, 2002
Posts: 1427
Did you download the IBM VM from Palm? I am not sure what you meant by "the left and right controls do not work". They should work.


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Gregg Bolinger
GenRocket Founder
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Joined: Jul 11, 2001
Posts: 15286
    
    6

Originally posted by Michael Yuan:
Did you download the IBM VM from Palm? I am not sure what you meant by "the left and right controls do not work". They should work.


No, I downloaded the one from Sun. Silly me. Well, with's Sun's 1.0 VM, they don't work. I push left, the little snake doesn't move left.
Gregg Bolinger
GenRocket Founder
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Joined: Jul 11, 2001
Posts: 15286
    
    6

Do you have a link for that download, BTW?
Michael Yuan
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Joined: Mar 07, 2002
Posts: 1427
I just checked the requirements for the IBM VM and Zire 31 is not on the list. I am not sure whether it would work. It also costs $6 for non-Tungsten devices.

http://www.palmone.com/us/support/jvm/

The Sun VM is only intended to be a "reference implementation". The IBM VM is definitely better quality and more feature rich (it supports MIDP 2.0 and a number of IBM's own "enterprise" packages).

Do you have a cell phone? Most new wireless plans offer free J2ME phones as sign-up incentives. That would be a much better device to play with J2ME.

Palm made a strategic mistake (IMHO) in 2001 to drag feet on various key J2ME specs and support their proprietary C API instead of Java on their devices. That has cost them dearly in terms of both developer support and market share. In the future, I do not think they stand a chance against the .Net powered windows mobile devices and Java powered Symbian devices.
 
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