…and check out the new Google Web Toolkit.
Not only does it have some really cool AJAX-enabling technology, it ships both JDT and SWT. The embedded GWT browser is built with SWT for use during development.
From an email from Bret Taylor, the PM on the project:
GWT has two components: a Java-to-JavaScript compiler, a command line tool that translates Java to JavaScript; and a “hosted web browser,” a special web browser used to debug GWT applications … The hosted web browser uses SWT since it has a UI. It is a very simple UI (a window, toolbar, and embedded browser control, basically).
