TreeNode (Java SE 11 & JDK 11 )

All Known Subinterfaces:

MutableTreeNode

All Known Implementing Classes:

AbstractDocument.AbstractElement, AbstractDocument.BranchElement, AbstractDocument.LeafElement, DefaultMutableTreeNode, DefaultStyledDocument.SectionElement, HTMLDocument.BlockElement, HTMLDocument.RunElement, JTree.DynamicUtilTreeNode
```
public interface TreeNode
```
Defines the requirements for an object that can be used as a tree node in a JTree.
Implementations of TreeNode that override equals will typically need to override hashCode as well. Refer to TreeModel for more information. For further information and examples of using tree nodes, see How to Use Tree Nodes in The Java Tutorial.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Enumeration<? extends TreeNode>`	`children()`	Returns the children of the receiver as an `Enumeration`.
`boolean`	`getAllowsChildren()`	Returns true if the receiver allows children.
`TreeNode`	`getChildAt(int childIndex)`	Returns the child `TreeNode` at index `childIndex`.
`int`	`getChildCount()`	Returns the number of children `TreeNode`s the receiver contains.
`int`	`getIndex(TreeNode node)`	Returns the index of `node` in the receivers children.
`TreeNode`	`getParent()`	Returns the parent `TreeNode` of the receiver.
`boolean`	`isLeaf()`	Returns true if the receiver is a leaf.

- Method Detail
  - getChildAt
```
TreeNode getChildAt(int childIndex)
```
    Returns the child TreeNode at index childIndex.
    
    Parameters:
    
    childIndex - index of child
    
    Returns:
    
    the child node at given index
  - getChildCount
```
int getChildCount()
```
    Returns the number of children TreeNodes the receiver contains.
    
    Returns:
    
    the number of children the receiver contains
  - getParent
```
TreeNode getParent()
```
    Returns the parent TreeNode of the receiver.
    
    Returns:
    
    the parent of the receiver
  - getIndex
```
int getIndex(TreeNode node)
```
    Returns the index of node in the receivers children. If the receiver does not contain node, -1 will be returned.
    
    Parameters:
    
    node - node to be loked for
    
    Returns:
    
    index of specified node
  - getAllowsChildren
```
boolean getAllowsChildren()
```
    Returns true if the receiver allows children.
    
    Returns:
    
    whether the receiver allows children
  - isLeaf
```
boolean isLeaf()
```
    Returns true if the receiver is a leaf.
    
    Returns:
    
    whether the receiver is a leaf
  - children
```
Enumeration<? extends TreeNode> children()
```
    Returns the children of the receiver as an Enumeration.
    
    Returns:
    
    the children of the receiver as an Enumeration