Can you create a window/frame without using Swing?

I'm trying to start a project that uses the Processing graphics libraries. They claim to interfere with Swing, and that I shouldn't use it. The eliminates the commonly used GUI libraries, and I find my self at a loss to simply create a window. Processing can create a Papplet, witch is also kind of a window, but I don't know if that is a suitable container for the entire project. Thanks in advance.

The pre-Swing classes in the AWT packages can be used to create a window or frame.