| Package | Description | 
|---|---|
| java.awt | Contains all of the classes for creating user
interfaces and for painting graphics and images. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AWTEventMulticasterAWTEventMulticasterimplements efficient and thread-safe multi-cast
 event dispatching for the AWT events defined in thejava.awt.eventpackage. | 
| Modifier and Type | Method and Description | 
|---|---|
| static HierarchyListener | AWTEventMulticaster. add(HierarchyListener a,
   HierarchyListener b)Adds hierarchy-listener-a with hierarchy-listener-b and
 returns the resulting multicast listener. | 
| HierarchyListener[] | Component. getHierarchyListeners()Returns an array of all the hierarchy listeners
 registered on this component. | 
| static HierarchyListener | AWTEventMulticaster. remove(HierarchyListener l,
      HierarchyListener oldl)Removes the old hierarchy-listener from hierarchy-listener-l and
 returns the resulting multicast listener. | 
| Modifier and Type | Method and Description | 
|---|---|
| static HierarchyListener | AWTEventMulticaster. add(HierarchyListener a,
   HierarchyListener b)Adds hierarchy-listener-a with hierarchy-listener-b and
 returns the resulting multicast listener. | 
| void | Component. addHierarchyListener(HierarchyListener l)Adds the specified hierarchy listener to receive hierarchy changed
 events from this component when the hierarchy to which this container
 belongs changes. | 
| static HierarchyListener | AWTEventMulticaster. remove(HierarchyListener l,
      HierarchyListener oldl)Removes the old hierarchy-listener from hierarchy-listener-l and
 returns the resulting multicast listener. | 
| void | Component. removeHierarchyListener(HierarchyListener l)Removes the specified hierarchy listener so that it no longer
 receives hierarchy changed events from this component. | 
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