The Package Explorer supports Java™ development through the JDT. Building a project in SCLM involves creating the source, adding it to SCLM and creating an ARCHDEF, creating a build script referenced by the ARCHDEF and building the ARCHDEF.
Refer to the Building and deploying a J2EE project topic for more information about the mechanics of building, and deploying a J2EE project in the SCLM Developer Toolkit.