Package org.w3c.dom
Interface ElementTraversal
public interface ElementTraversal
The
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 return 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.
See also the Element Traversal Specification.
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Method Summary
Modifier and TypeMethodDescriptionint
Returns the current number of element nodes that are children of this element.Returns the first child element node of this element.Returns the last child element node of this element.Returns the next sibling element node of this element.Returns the previous sibling element node of this element.
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Method Details
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getFirstElementChild
Element getFirstElementChild()Returns the first child element node of this element.null
if this element has no child elements. -
getLastElementChild
Element getLastElementChild()Returns the last child element node of this element.null
if this element has no child elements. -
getPreviousElementSibling
Element getPreviousElementSibling()Returns the previous sibling element node of this element.null
if this element has no element sibling nodes that come before this one in the document tree. -
getNextElementSibling
Element getNextElementSibling()Returns the next sibling element node of this element.null
if this element has no element sibling nodes that come after this one in the document tree. -
getChildElementCount
int getChildElementCount()Returns the current number of element nodes that are children of this element.0
if this element has no child nodes that are ofnodeType
1
.
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