Component listeners in Java:

Section introduced you to the concept of listeners through the intuitive example of a button. In this section, we look at the listeners needed for other components and events. You will see that the approach is exactly the same as that with buttons: that is, create the component, define the appropriate listener class and then attach an instance of the listener class to the component. The main complications that arise are due to most listener interfaces being more complex than the ActionListener. So, although we will not be able to cover every aspect of all of the events and component combinations, you will have sufficient experience of them to be able to use the Java reference material for the rest.

Table displays a number of events that can be generated by GUI objects.

The names of the respective listeners are formed by taking the name of the event and adding listener, so we have ComponentListener, KeyListener and so on. The add and remove methods simply have the word add (or remove) prefixing the interface name, such as addComponentListener and removeKeyListener.

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