[Chapter 21] FocusAdapter

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| Chapter 21 java.awt.event Reference |

# FocusAdapter

## Name

FocusAdapter

##

## Description

The `FocusAdapter` class implements the methods of `FocusListener` with empty functions. It may be easier for you to extend `FocusAdapter`, overriding only those methods you are interested in, than to implement `FocusListener` and provide the empty functions yourself.

## Class Definition

    public abstract class java.awt.event.FocusAdapter
       extends java.lang.Object
       implements java.awt.event.FocusListener {
      // Instance Methods
      public void focusGained (FocusEvent e);
      public void focusLost (FocusEvent e);
    }

## Instance Methods

### focusGained

#### public void focusGained (FocusEvent e)

Parameters

  e

    The event that has occurred.

Description

  Does nothing. Override this function to be notified when a component gains focus.

### focusLost

#### public void focusLost (FocusEvent e)

Parameters

  e

    The event that has occurred.

Description

  Does nothing. Override this function to be notified when a component loses focus.

## See Also

`FocusEvent`, `FocusListener`

ContainerListener |  | FocusEvent