Wicket DropDown Change event

[Sibgha Nazir]

Hi,

I am not able to trigger the on change event of the drop down in the
wicket.

In the class DPanel,java, I am simply trying to print on the console when
the change event has occured.

        dropdown.add(*new* AjaxFormComponentUpdatingBehavior("onchange") {

            /**

             *

             */

            *private* *static* *final* *long* *serialVersionUID* =
-6744838136235652577L;


            *protected* *void* onUpdate(AjaxRequestTarget target) {

                System.*out*.println("Changed");


            }

        });

Need Help. Following is my quick start application.
https://github.com/Sibgha360/dropdownexample.git

Thanks