SAN FRANCISCO -- JavaOne Developer Conference -- June 27, 2005 -- Sun Microsystems, Inc. (NASDAQ: SUNW), founder and leading advocate for Java technology, today took the next step in sustaining Java growth and promoting community participation by open sourcing key Java Enterprise technologies. Announced at the 10th annual JavaOne Developer Conference, Sun is further defining its commitment to the open source community by releasing code for the popular Java System Application Server Platform Edition 9.0 and Java System Enterprise Server Bus .

"Sun is bringing innovation from the source of Java and providing the benchmark of Java Enterprise Edition compatibility to customers that have been asking for an open version of a Java application server that's robust enough for commercial deployment," said John Loiacono, Sun's executive vice president of Software Group. "By open sourcing these Java technologies and the Solaris Operating System, Sun is leading the industry to dramatically increase community participation as well as drive greater economic growth and social progress for everyone. The inclusion of Sun's application server and directory engine lays the foundation for the continued evolution of a complete Java Enterprise System platform."

Sun is sharing the source code for the Java System Application Server Platform Edition 9.0 as well as the Java System Enterprise Server Bus (Java ESB), under the OSI-approved CDDL license that is also being used for Sun's OpenSolaris project.

Java System Application Server Platform Edition 9.0 is the benchmark for compatibility in Java Enterprise environments. Based on the latest Java Platform, Enterprise Edition 5 reference implementation, Java System Application Server Platform Edition 9.0 will deliver greater ease of development and significantly enhanced support for web services and Service Oriented Architectures (SOAs).

The open sourcing of Java System Application Server Platform Edition 9.0 is designed to encourage developers across the Java ecosystem to review and contribute to the creation of the open source application server to more rapidly advance the development of a Java Platform, Enterprise Edition 5 compliant implementation. Developers can view the latest daily updates, contribute to fixes and features, and participate in discussions at http://glassfish.dev.java.net.

Sun's recently released Solaris 10 Operating System includes Java System Application Server Platform Edition 8.1 for running enterprise Java applications on Solaris 10. The company today disclosed its plans to include the new Java System Application Server Platform Edition 9.0 with Solaris 10 in an upcoming release.

Sun is also introducing the Java ESB, the first fully open sourced enterprise service bus implementation based on the Java Business Integration (JBI) specification (JSR 208) and reference implementation. Sun's Java ESB will increase business agility and reduce cost of integration through an open integration framework for Service Oriented Architectures (SOAs), to enable customers to more rapidly implement open SOA applications.

Through the community development project, Java Open Enterprise Service Bus (Open ESB), hosted on Java.net, Sun will share this exciting new technology with the industry in order to speed innovation around ESBs and to encourage developer adoption. Built on the JBI Reference Implementation, the Open ESB project leverages the pluggable architecture of JBI and extends the JBI Reference Implementation with a a core set of enterprise service bus capabilities.

In addition, in an effort to stimulate development of applications that leverage presence-awareness and real-time communication, Sun is donating 135,000 lines of collaboration-focused infrastructure source code from its Sun Java System Instant Messaging and Sun Java Studio Enterprise products for use by the entire open source community on NetBeans.org. This project is designed to increase productivity by enabling Java developers to dynamically work together whether they are in the same office, different buildings or around the world.

About Sun Microsystems, Inc.

A singular vision -- "The Network Is The Computer" -- guides Sun in the development of technologies that power the world's most important markets. Sun's philosophy of sharing innovation and building communities is at the forefront of the next wave of computing: the Participation Age. Sun can be found in more than 100 countries and on the Web at http://sun.com.

Sun, Sun Microsystems, the Sun Logo, Java, JavaOne, Solaris and The Network Is The Computer are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries.