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## javax.swing.plaf.basic
Class BasicTreeUI.TreeExpansionHandler

    java.lang.Object
      |
      +--javax.swing.plaf.basic.BasicTreeUI.TreeExpansionHandler

public class BasicTreeUI.TreeExpansionHandler
extends java.lang.Object
implements TreeExpansionListener

Updates the TreeState in response to nodes expanding/collapsing.

Constructor Summary
`BasicTreeUI.TreeExpansionHandler()`

Method Summary
`void` | `treeCollapsed(TreeExpansionEvent event)` Called whenever an item in the tree has been collapsed.
`void` | `treeExpanded(TreeExpansionEvent event)` Called whenever an item in the tree has been expanded.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### BasicTreeUI.TreeExpansionHandler

    public BasicTreeUI.TreeExpansionHandler()

Method Detail

### treeExpanded

    public void treeExpanded(TreeExpansionEvent event)

  Called whenever an item in the tree has been expanded.
  Specified by:
    treeExpanded in interface TreeExpansionListener

### treeCollapsed

    public void treeCollapsed(TreeExpansionEvent event)

  Called whenever an item in the tree has been collapsed.
  Specified by:
    treeCollapsed in interface TreeExpansionListener

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