META-INF.modules.java.desktop.classes.java.awt.event.ContainerAdapter Maven / Gradle / Ivy
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package java.awt.event;
/**
* An abstract adapter class for receiving container events.
* The methods in this class are empty. This class exists as
* convenience for creating listener objects.
*
* Extend this class to create a {@code ContainerEvent} listener
* and override the methods for the events of interest. (If you implement the
* {@code ContainerListener} interface, you have to define all of
* the methods in it. This abstract class defines null methods for them
* all, so you can only have to define methods for events you care about.)
*
* Create a listener object using the extended class and then register it with
* a component using the component's {@code addContainerListener}
* method. When the container's contents change because a component has
* been added or removed, the relevant method in the listener object is invoked,
* and the {@code ContainerEvent} is passed to it.
*
* @see ContainerEvent
* @see ContainerListener
* @see Tutorial: Writing a Container Listener
*
* @author Amy Fowler
* @since 1.1
*/
public abstract class ContainerAdapter implements ContainerListener {
/**
* Constructs a {@code ContainerAdapter}.
*/
protected ContainerAdapter() {}
/**
* Invoked when a component has been added to the container.
*/
public void componentAdded(ContainerEvent e) {}
/**
* Invoked when a component has been removed from the container.
*/
public void componentRemoved(ContainerEvent e) {}
}