java.awt.event
Interface HierarchyListener
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- All Superinterfaces:
- EventListener
- All Known Implementing Classes:
- AWTEventMulticaster
public interface HierarchyListener extends EventListener
The listener interface for receiving hierarchy changed events. The class that is interested in processing a hierarchy changed event should implement this interface. The listener object created from that class is then registered with a Component using the Component'saddHierarchyListenermethod. When the hierarchy to which the Component belongs changes, thehierarchyChangedmethod in the listener object is invoked, and theHierarchyEventis passed to it.Hierarchy events are provided for notification purposes ONLY; The AWT will automatically handle changes to the hierarchy internally so that GUI layout, displayability, and visibility work properly regardless of whether a program registers a
HierarchyListeneror not.- Since:
- 1.3
- See Also:
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HierarchyEvent
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description voidhierarchyChanged(HierarchyEvent e)Called when the hierarchy has been changed.
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Method Detail
hierarchyChanged
void hierarchyChanged(HierarchyEvent e)
Called when the hierarchy has been changed. To discern the actual type of change, callHierarchyEvent.getChangeFlags().- See Also:
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HierarchyEvent.getChangeFlags()
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