Apple has posted
Java 1.3.1 and 1.4.2 Release 2. The update is available for download from Apple’s Web site and through the Software Update system preference pane.
“Java 2 Platform Standard Edition (J2SE) 1.3.1 and 1.4.2 Release 2 improves functionality of J2SE 1.4.2 on Mac OS X v. 10.4 Tiger and updates J2SE 1.3.1 for better interaction with J2SE 1.4.2. Release 2 includes Sun’s version 1.4.2_09,” said Apple.
The update requires Mac OS X v10.4 or Mac OS X Server v10.4 or later.
Apple also lists
Java Security Update. which includes Java 1.3.1 and 1.4.2. System requirements are Mac OS X v10.3.9 or later.