public interface ElementTraversal
ElementTraversal
interface is a set of read-only attributes which allow an author to easily navigate between elements in a document. In conforming implementations of Element Traversal, all objects that implement Element
must also implement the ElementTraversal
interface. Four of the methods, getFirstElementChild()
, getLastElementChild()
, getPreviousElementSibling()
, and getNextElementSibling()
, each provides a live reference to another element with the defined relationship to the current element, if the related element exists. The fifth method, getChildElementCount()
, exposes the number of child elements of an element, for preprocessing before navigation.
Modifier and Type | Method | Description |
---|---|---|
int |
getChildElementCount() |
Returns the current number of child nodes of the element which are of the Element type. |
Element |
getFirstElementChild() |
Returns a reference to the first child node of the element which is of the Element type. |
Element |
getLastElementChild() |
Returns a reference to the last child node of the element which is of the Element type. |
Element |
getNextElementSibling() |
Returns a reference to the sibling node of the element which most immediately follows the element in document order, and which is of the Element type. |
Element |
getPreviousElementSibling() |
Returns a reference to the sibling node of the element which most immediately precedes the element in document order, and which is of the Element type. |
Element getFirstElementChild()
Element
type.null
if the element has no child of the Element
type.Element getLastElementChild()
Element
type.null
if the element has no child of the Element
type.Element getPreviousElementSibling()
Element
type.null
if the element has no sibling node of the Element
type that comes before this one.Element getNextElementSibling()
Element
type.null
if the element has no sibling node of the Element
type that comes after this one.int getChildElementCount()
Element
type.0
if the element has no element children.
© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.xml/org/w3c/dom/ElementTraversal.html