Java.util.Date and java.sql.Date are very similar classes, but they do not directly convert.
The RichFaces Calendar control requires a java.util.Date, just as radiobuttons require booleans.
It is important to remember that the JSF backing bean is a
GUI Model object and not a persistence Model object. While sometimes the same object can be used in both roles, that would not be the case for dates and booleans if the persistence model isn't using
java util.Date or java.lang.Boolean/boolean.
You could probably use a customer Converter to translate the backing bean property for your dates, but in your particular case, it's probably just as easy to do it this way:
And change the import on your backing bean from java.sql.Date to java.util.Date
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.