java.awt.event: public interface: FocusListener

java.awt.event
public interface: FocusListener [javadoc | source]

All Implemented Interfaces:
EventListener

All Known Implementing Classes:
DnDEventMulticaster, ToolBarFocusListener, FocusHandler, Handler, FocusHandler, BasicComboBoxEditor, ComposedTextCaret, ArrowButtonHandler, Handler, AccessibleAWTFocusHandler, DefaultCaret, Handler, MetalComboBoxEditor, MetalButtonListener, Handler, FocusHandler, Handler, FocusHandler, Handler, SynthFormattedTextFieldUI, SynthPasswordFieldUI, ToolkitEventMulticaster, UIResource, MenuItemFocusListener, SynthTextFieldUI, Handler, AccessibleFocusHandler, MutableCaretEvent, AWTEventMulticaster, BasicCaret, BasicButtonListener, UIResource, FocusAdapter, FocusHandler, FocusHandler, FocusHandler, Handler

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.

Also see:

FocusAdapter

FocusEvent

Tutorial: Writing a Focus Listener

author: Carl - Quinn

since: 1.1 -

Method from java.awt.event.FocusListener Summary:
focusGained, focusLost

Method from java.awt.event.FocusListener Detail:
public void focusGained(FocusEvent e) Invoked when a component gains the keyboard focus.
public void focusLost(FocusEvent e) Invoked when a component loses the keyboard focus.