| Package | Description | 
|---|---|
| javax.swing | Provides a set of "lightweight"
(all-Java language) components that,
to the maximum degree possible, work the same on all platforms. | 
| javax.swing.plaf.basic | Provides user interface objects built according to the
Basic look and feel. | 
| javax.swing.tree | Provides classes and interfaces for dealing with
 javax.swing.JTree. | 
| Modifier and Type | Class and Description | 
|---|---|
| protected class  | JTree.AccessibleJTreeThis class implements accessibility support for the
  JTreeclass. | 
| protected class  | JTree.TreeModelHandlerListens to the model and updates the  expandedStateaccordingly when nodes are removed, or changed. | 
| Modifier and Type | Field and Description | 
|---|---|
| protected TreeModelListener | JTree. treeModelListenerUpdates the  expandedState. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected TreeModelListener | JTree. createTreeModelListener()Creates and returns an instance of  TreeModelHandler. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | BasicTreeUI.TreeModelHandlerForwards all TreeModel events to the TreeState. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected TreeModelListener | BasicTreeUI. createTreeModelListener()Returns a listener that can update the tree when the model changes. | 
| Modifier and Type | Method and Description | 
|---|---|
| TreeModelListener[] | DefaultTreeModel. getTreeModelListeners()Returns an array of all the tree model listeners
 registered on this model. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | DefaultTreeModel. addTreeModelListener(TreeModelListener l)Adds a listener for the TreeModelEvent posted after the tree changes. | 
| void | TreeModel. addTreeModelListener(TreeModelListener l)Adds a listener for the  TreeModelEventposted after the tree changes. | 
| void | DefaultTreeModel. removeTreeModelListener(TreeModelListener l)Removes a listener previously added with addTreeModelListener(). | 
| void | TreeModel. removeTreeModelListener(TreeModelListener l)Removes a listener previously added with
  addTreeModelListener. | 
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