Officially launching J2SE 5.0 yesterday vice president for Java developer platform and strategy Jeff Jackson said version 6.0 of the programming framework, codenamed Mustang, is now in the works as the company has taken feedback from partners and licensees over potential features.

Mustang will continue work stated in Tiger, focusing on quality of implementation, XML web services, Java desktop and performance, Jackson said. The breadth of the platform is a huge spectrum, Jackson said. We got a huge number of new feature requests.

Java Specification Requests (JSRs), which eventually become Java APIs if successfully completed, will appear in the Java Community Process (JCP) during the next few months.

J2SE is an important platform specification, as it forms the basis of other Java platforms, notably its server-side cousin Java 2 Enterprise Edition (J2EE). J2EE applications utilize J2SE specifications, with additional frameworks and libraries added to support distributed and web-based development and deployment.

Closer to home, Sun used a conference call with press yesterday to formally announce J2SE 5.0 is available for download, along with backing from Java licensees.

Borland Software, IBM and Eclipse are among J2SE 5.0’s earliest suppliers, with support announced for the Java Development Kit (JDK) 5.0 and Tiger. Borland’s JBuilder 2005 is among the first development tools to support J2SE 5.0.

Commenting on the degree of community input and support for J2SE 5.0, Java father and vice president, fellow and developer platforms group Chief Technology Officer (CTO) James Gosling, said, I’m really happy with the amount of support that is showing up… for Tiger.