Java
provides a special feature, called an adapter class that can simplify the creation
of event handles in certain situations. An adapter class provides an empty
implementation of all methods in an event listener interface. Adapter classes
are useful when we want to receive and process only some the events that are
handled by a particular event listener interface. We can define a new class to
act as an event listener by extending one of the adapter classes and
implementing only those events in which we are interested.
Ex of adapter class:
i)
Component Adapter
ii)
Container Adapter
iii)
Focus Adapter
iv)
Key Adapter
v)
Mouse Adapter
vi)
Window Adapter
