[resend -- apologies for duplicates]
JDK 1.4 contains a new set of buffer classes in the java.nio
package which can describe memory that lives outside the Java
garbage-collected heap. These "direct buffers" have uses in many
types of applications where data throughput in to and out of the
Java virtual machine implementation is the bottleneck.
A demonstration which applies these java.nio direct buffers to
the 3D graphics domain via OpenGL for Java is now available with
both Java Web Start binaries as well as complete source code.
http://java.sun.com/products/jfc/tsc/articles/jcanyon/
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