When thereâs not enough of these hormones, your body has trouble with these basic functions. That causes the symptoms of adrenal insufficiency -- fatigue, muscle weakness, low appetite, weight loss, and belly pain, among others. You can have either primary or secondary adrenal insufficiency.
In the DOM event model, there is a clear distinction between an event listener and a listener function: an event listener is an instance of a class that implements the EventListener interface, whereas a listener function is a method of that class named handleEvent().
To write an Action Listener, follow the steps given below: 1  Declare an event handler class and specify that the class either implements an ActionListener interface or extends a class that implements an ActionListener interface. 2  Register an instance of the event handler class as a listener on one or more components.