Sun's StarOffice Software Developers Kit (SDK) is intended to make the productivity suite more competitive with Microsoft's Office suite.
It will allow developers to use Java in order to add custom features to the productivity software, by writing software plug-ins or customising menus, for example, said Joerg Heilig, Sun's director of engineering for StarOffice.
Currently, StarOffice developers can tweak the software using a scripting language called StarOffice Basic, which is similar to Microsoft's Visual Basic language.
"There are things you can do in StarOffice 6.0 already, it's just the development kit wasn't available," Heilig said. Some resources for StarOffice developers are available at OpenOffice.org, an open-source community that develops a free version of StarOffice.
Microsoft Office developers have long used tools to customise the company's software suite for specific business uses. For example, a developer can create macros within Microsoft Excel that automate steps for filling out expense reports, such as currency conversion.
Sun's goal is to let developers create similar macros with Java, taking advantage of its widespread use by developers.
"We believe this is a big advantage because many people know Java," Heilig said. "The security model and design principles of Java can be very easily used and reused in the context of an office suite."
The toolkit will be available as a download from the OpenOffice.org Web site in the middle of next year, according to Sun. It will also be included with the next minor upgrade to StarOffice 6.0. That release is designed primarily for enterprise customers.
An early version of the SDK is available on the OpenOffice.org Web site.