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**Known Subinterfaces:**- MutableTreeNode

**Known Implementing Classes:**- AbstractDocument.AbstractElement, AbstractDocument.BranchElement, AbstractDocument.LeafElement, DefaultMutableTreeNode, DefaultStyledDocument.SectionElement, HTMLDocument.BlockElement, HTMLDocument.RunElement, JTree.DynamicUtilTreeNode

`public interface `**TreeNode**

A tree node.

## Method Summary

`@SuppressWarnings("rawtypes" )`

- Returns an enumeration of the children of this node, or an empty enumeration if this node has no children.

`boolean`

`getAllowsChildren()`

- Returns
`true`

if this node allows children, and`false`

otherwise.

`TreeNode`

`getChildAt(int index)`

- Returns the child node at the given index.

`int`

`getChildCount()`

- Returns the number of children for this node.

`int`

`TreeNode`

`getParent()`

- Returns the parent node for this tree node, or
`null`

if this node has no parent.

`boolean`

`isLeaf()`

- Returns
`true`

if this node is a leaf node, and`false`

otherwise.

public @SuppressWarnings("rawtypes" ) throws children()

Returns an enumeration of the children of this node, or an empty enumeration if this node has no children.

Returns:- An enumeration of the children of this node.

public boolean getAllowsChildren()

Returns`true`

if this node allows children, and`false`

otherwise.

Returns:- A boolean.

public TreeNode getChildAt(int index)

Returns the child node at the given index.

Parameters:`index`

- the index (in the range`0`

to`getChildCount() - 1`

).

Returns:- The child node at the given index.

public int getChildCount()

Returns the number of children for this node.

Returns:- The number of children for this node.

public int getIndex(TreeNode node)

Returns the index of the specified child node, or -1 if the node is not in fact a child of this node.

Parameters:`node`

- the node (`null`

not permitted).

Returns:- The index of the specified child node, or -1.

Throws:`IllegalArgumentException`

- if`node`

is`null`

.

public TreeNode getParent()

Returns the parent node for this tree node, or`null`

if this node has no parent.

Returns:- The parent node (possibly
`null`

).

public boolean isLeaf()

Returns`true`

if this node is a leaf node, and`false`

otherwise.

Returns:- A boolean.

TreeNode.java --
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