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Using AJAX usually means writing tons of Java Script code to handle asynchronous requests and to update user interface, but with Wicket we can leave all this boilerplate code to the framework and we don't even need to write a single line of Java Script to start using AJAX.
Only some basic knowledge of Java and html are needed.
We will begin with basic Wicket form validation to put things into perspective.
I hope to provide more information on wicket's Ajax support in subsequent blogs.
These rules will kick in on click of the submit button.
Wicket has a Feedback Panel that displays the error messages captured during form validation.