Will the future Java3D version 1.3 support 64-bit operations on the Sun
J2SDK 1.4.0? Is this a concern? I couldn't find anything about in the spec.

Below I've excerpted a relevant passage from Sun's New Features and
Enhancements for JDK 1.4

(see http://java.sun.com/j2se/1.4/docs/relnotes/features.html)

The SolarisTM-SPARCTM platform edition of J2SDK 1.4.0 will support 64-bit
operation on 64-bit Sparc-v9 platforms when using the Java HotSpot Server
VM. With a 64-bit address space, more than four gigabytes of heap memory is
available. The Java HotSpot Server VM includes support for both 32-bit and
64-bit operations, and users can select either 32-bit or 64-bit operation by
using command-line flags -d32 or -d64, respectively.

Users of the Java Native Interface will need to recompile their code to be
able to run it on the 64-bit VM.

There is no 64-bit support for the Java HotSpot Client VM. Only the Java
HotSpot Server VM provides for optional 64-bit operation.

Users must install 64-bit Solaris support in order to run the virtual
machine in 64-bit mode.

On older Sparcv9 systems, users must modify the file
/platform/sun4u/boot.conf in order to enable 64-bit programs. See the text
in the boot.conf file for more information.

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