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package java.awt.event;

import java.util.EventListener;


The listener interface for receiving component events. The class that is interested in processing a component event either implements this interface (and all the methods it contains) or extends the abstract ComponentAdapter class (overriding only the methods of interest). The listener object created from that class is then registered with a component using the component's addComponentListener method. When the component's size, location, or visibility changes, the relevant method in the listener object is invoked, and the ComponentEvent is passed to it. 
 Component events are provided for notification purposes ONLY; The AWT will automatically handle component moves and resizes internally so that GUI layout works properly regardless of whether a program registers a ComponentListener or not. 
Author:Carl Quinn
See Also:
Since:1.1
/**
 * The listener interface for receiving component events.
 * The class that is interested in processing a component event
 * either implements this interface (and all the methods it
 * contains) or extends the abstract {@code ComponentAdapter} class
 * (overriding only the methods of interest).
 * The listener object created from that class is then registered with a
 * component using the component's {@code addComponentListener}
 * method. When the component's size, location, or visibility
 * changes, the relevant method in the listener object is invoked,
 * and the {@code ComponentEvent} is passed to it.
 * <P>
 * Component events are provided for notification purposes ONLY;
 * The AWT will automatically handle component moves and resizes
 * internally so that GUI layout works properly regardless of
 * whether a program registers a {@code ComponentListener} or not.
 *
 * @see ComponentAdapter
 * @see ComponentEvent
 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/componentlistener.html">Tutorial: Writing a Component Listener</a>
 *
 * @author Carl Quinn
 * @since 1.1
 */
public interface ComponentListener extends EventListener {
    
Invoked when the component's size changes.

Params:
  • e – the event to be processed
/**
     * Invoked when the component's size changes.
     * @param e the event to be processed
     */
    public void componentResized(ComponentEvent e);

    
Invoked when the component's position changes.

Params:
  • e – the event to be processed
/**
     * Invoked when the component's position changes.
     * @param e the event to be processed
     */
    public void componentMoved(ComponentEvent e);

    
Invoked when the component has been made visible.

Params:
  • e – the event to be processed
/**
     * Invoked when the component has been made visible.
     * @param e the event to be processed
     */
    public void componentShown(ComponentEvent e);

    
Invoked when the component has been made invisible.

Params:
  • e – the event to be processed
/**
     * Invoked when the component has been made invisible.
     * @param e the event to be processed
     */
    public void componentHidden(ComponentEvent e);
}