META-INF.modules.java.desktop.classes.javax.swing.tree.TreeNode Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package javax.swing.tree;
import java.util.Enumeration;
/**
* 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 {@link javax.swing.tree.TreeModel} for more information.
*
* For further information and examples of using tree nodes,
* see How to Use Tree Nodes
* in The Java Tutorial.
*
* @author Rob Davis
* @author Scott Violet
*/
public interface TreeNode
{
/**
* Returns the child TreeNode at index
* childIndex.
*
* @param childIndex index of child
* @return the child node at given index
*/
TreeNode getChildAt(int childIndex);
/**
* Returns the number of children TreeNodes the receiver
* contains.
*
* @return the number of children the receiver contains
*/
int getChildCount();
/**
* Returns the parent TreeNode of the receiver.
*
* @return the parent of the receiver
*/
TreeNode getParent();
/**
* Returns the index of node in the receivers children.
* If the receiver does not contain node, -1 will be
* returned.
*
* @param node node to be loked for
* @return index of specified node
*/
int getIndex(TreeNode node);
/**
* Returns true if the receiver allows children.
*
* @return whether the receiver allows children
*/
boolean getAllowsChildren();
/**
* Returns true if the receiver is a leaf.
*
* @return whether the receiver is a leaf
*/
boolean isLeaf();
/**
* Returns the children of the receiver as an Enumeration.
*
* @return the children of the receiver as an {@code Enumeration}
*/
Enumeration children();
}