http://code.google.com/docreader/#p(google-web-toolkit-doc-1-5)s(google-web-toolkit-doc-1-5)t(RefJreEmulation)
(for GWT 1.5)
In GWT format using a StringBuffer / StringBuilder and the i18n package (for number and date formatting). Or you can use a Messages bundle (which is what we use) to specify the ordering of your String.
http://google-web-toolkit-doc-1-5.googlecode.com/svn/javadoc/1.5/com/google/gwt/i18n/client/Messages.html
Hope that helps a bit ;)