On Jun 15, 2009, at 10:11 PM, Greg Guerin wrote:
Mike Swingler wrote:
Java Web Start in Update 4 now relies on the latest (Java SE 6)
version of launcher/deployment classes which are designed to
launch in all versions of Java, back to 1.4.
How does that work on machines that lack a 64-bit-capable CPU?
The one machine that's running Leopard here is 64-bit (Core 2 Duo),
but I'd like to know what to expect when I get around to upgrading
the other machines, which are not 64-bit.
The deploy.jar and javaws.jar classes are all compiled to be
backward compatible to run on a 1.4 JRE, so they basically just work
as designed by Sun. The Java on a 32-bit only capable machine simply
refers to the Deploy.bundle just like a 64-bit capable machine, but
loads the classes in J2SE 5.0 instead of Java SE 6.
There is no rule that says the deployment resources have to co-
habitate with the JDK, so by putting them in their own Mac OS X
bundle, they can be versioned and updated independently (and cuts a
few MB off the update size, since we don't have to ship redundant
copies).
Cheers,
Mike Swingler
Java Runtime Engineer
Apple Inc.
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