Interface TreeNode

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.

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 TreeNodes 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.

Methods

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

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https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/tree/TreeNode.html