[Chapter 20] 20.11 java.awt.event.FocusAdapter (JDK 1.1)

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| Chapter 20 The java.awt.event Package |

## 20.11 java.awt.event.FocusAdapter (JDK 1.1)

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This class is a trivial implementation of `FocusListener`; it provides empty bodies for each of the methods of that interface. When you are not interested in all of these methods, it is often easier to subclass `FocusAdapter` than it is to implement `FocusListener` from scratch.

    public abstract class FocusAdapter extends Object implements FocusListener {
        // Default Constructor: public FocusAdapter()
        // Public Instance Methods
                public void focusGained(FocusEvent e);  // From FocusListener
                public void focusLost(FocusEvent e);  // From FocusListener
    }

### Hierarchy:

`Object->FocusAdapter(FocusListener(EventListener))`

java.awt.event.ContainerListener (JDK 1.1) |  | java.awt.event.FocusEvent (JDK 1.1)