The Java virtual machines in this release include several enhancements.
Signal-chaining facility.
64-bit support for 64-bit Sparc-v9 platforms.
Error-reporting mechanism.
New command-line option for performaing additional checks for Java Native Interface (JNI) functions.
New facility for logging garbage-collection events.
For more information, see http://java.sun.com/j2se/1.4/docs/guide/vm/index.html.