I ran into the same problem earlier today, and had to search for quite a long time to understand where the problem came from. The problem comes only from GWT and is not related to AppEngine (obviously, this topic shouldn't be in the GAE/J GoogleGroup, but anyway ... ^^). GWT emulates the JRE on the client-side, but not all classes are supported. Have a look at the GWT Documentation > Reference > JRE Emulation Reference section for more details on what is currently supported and what is not.
At the moment, the java.util.Calendar classes aren't supported (http://code.google.com/intl/fr-FR/webtoolkit/doc/latest/RefJreEmulation.html#Package_java_util), but you can use the com.google.gwt.user.datepicker.client.CalendarUtil class to perform simple calculations though. Hope this helps. -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
