FocusListener

Overview | Package | Class | Use | Tree | Deprecated | Index | Help

PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## java.awt.event
Interface FocusListener

All Superinterfaces:
  EventListener

All Known Subinterfaces:
  HFocusListener

All Known Implementing Classes:
  AWTEventMulticaster, FocusAdapter, HEventMulticaster

    public interface FocusListener

extends EventListener

The listener interface for receiving keyboard focus events on a component. The class that is interested in processing a focus event either implements this interface (and all the methods it contains) or extends the abstract `FocusAdapter` class (overriding only the methods of interest). The listener object created from that class is then registered with a component using the component's `addFocusListener` method. When the component gains or loses the keyboard focus, the relevant method in the listener object is invoked, and the `FocusEvent` is passed to it.

Since:
  1.1
Version:
  1.14 01/23/03
Author:
  Carl Quinn
See Also:
  `FocusAdapter`, `FocusEvent`, Tutorial: Writing a Focus Listener, Reference: The Java Class Libraries (update file)

Method Summary
`void` | `focusGained(FocusEvent e)` Invoked when a component gains the keyboard focus.
`void` | `focusLost(FocusEvent e)` Invoked when a component loses the keyboard focus.

Method Detail

### focusGained

    void focusGained(FocusEvent e)

  Invoked when a component gains the keyboard focus.

### focusLost

    void focusLost(FocusEvent e)

  Invoked when a component loses the keyboard focus.

Overview | Package | Class | Use | Tree | Deprecated | Index | Help

PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD