Java SE 6 Developer Preview 8
Apple has finally released an updated developer preview of Java SE 6 for Mac OS X 10.5 Leopard. Available to all Apple Developer Connection members, Java SE 6 Developer Preview 8 is targeted at Java developers. "This version of Java for Mac OS X requires an Intel-based Mac capable of running 64-bit applications, including computers with Core 2 Duo processors and any Mac Pro computer. Java SE 6 takes advantage of Leopard's 64-bit capabilities to offer unique performance capabilities for current and future generations of Macs."
  (Dec 19, 2007)

Quaqua Look and Feel 4.1
The Quaqua Look and Feel project for Mac OS X has released version 4.1. "The Quaqua Look and Feel is a user interface library for Java applications which wish to closely adhere to the Apple Human Interface Guidelines for Mac OS X," automatically switching between appropriate looks for the Tiger, Panther, and Jaguar versions of OS X, and providing Swing implementations of NSBrowser and NSSheet. "Version 4.1 includes a FileChooserUI which roughly simulates the native file dialogs in Mac OS X 10.5 Leopard. Except for panel backgrounds and frame borders, Quaqua still uses the Mac OS X 10.4 Tiger design."

JamVM/Classpath on iPhone
Mark J. Wielaard has compiled wiki and forum announcements of a Java-compatible environment for the iPhone in Free your IPhone. "Want some free java on your IPhone? Robert Lougher posted some screenshots of JamVM and GNU Classpath running on it..." Installation requires a jailbreak of your iPod Touch or iPhone, and the wiki has full instructions for building from source or just installing pre-built binaries.

MRJ Adapter 1.1
Steve Roy has posted version 1.1 of his MRJ Adapter for accessing Mac-specific Java functionality. "MRJ Adapter is partially a wrapper around some APIs provided by Apple and which are built into their various virtual machines. However, they have changed over time and some APIs were not always available, so MRJ Adapter provides a consistent API for the developer wanting to target the Mac. MRJ Adapter is an easier path for developers because it is easier to learn, leveraging concepts they already know, such as action listeners to handle menu items. It also shields the developer from the problems associated with compiling their code on other platforms when the APIs they need only exist on the Mac." MRJ Adapter is open-source and published under the Artistic License.

Java on Mac OS X v10.5 Release Notes
Apple has posted the Java on Mac OS X v10.5 Release Notes. "J2SE 5.0 on Mac OS X v10.5 contains many new features including 64-bit Intel support, a refreshed Swing Aqua Look and Feel, improved SWT interoperability, and a Sun 2D graphics pipeline." The available versions are also worth noting: "Java on Mac OS X v10.5 is comprised of J2SE 5.0 (1.5.0_13-b05) and J2SE 1.4 (1.4.2_16-b05). J2SE 1.3 is not present on Mac OS X v10.5. J2SE 5.0 is recommended for all development and deployment on Mac OS X, and all use of J2SE 1.4 is deprecated."
  (Oct 31, 2007)