Java by API/org.w3c.dom/Element

Element: getElementsByTagName(String name)

   <source lang="java">

import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.w3c.dom.Text; public class MainClass {

 public static void main(String[] args) throws Exception {
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   factory.setValidating(true);
   DocumentBuilder builder = factory.newDocumentBuilder();
   Document doc = builder.parse("yourFile.xml");
   Element rootElement = doc.getDocumentElement();
   NodeList children = rootElement.getChildNodes();
   Node current = null;
   int count = children.getLength();
   for (int i = 0; i < count; i++) {
     current = children.item(i);
     if (current.getNodeType() == Node.ELEMENT_NODE) {
       Element element = (Element) current;
       if (element.getTagName().equalsIgnoreCase("tableOfContents")) {
         // Get the list of <tocEntry> items
         NodeList tocitems = element.getElementsByTagName("tocEntry");
         // Obtain a reference to the second one
         Node secondChild = tocitems.item(1);
         // Create a new <tocEntry> element
         Element newTOCItem = doc.createElement("tocEntry");
         // Create a new "Help" text node
         Text newText = doc.createTextNode("Help");
         // Make it a child of the new <tocEntry> element
         // <tocEntry>Help</tocEntry>
         newTOCItem.appendChild(newText);
         // Add the new <tocEntry> element to <tableOfContents>
         element.insertBefore(newTOCItem, secondChild);
       }
     }
   }
   System.out.println(doc.getDocumentElement());
 }

}

</source>
   
  
 
  

Element: NodeList getChildNodes()

   <source lang="java">

import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class MainClass {

 public static void main(String[] args) throws Exception {
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   factory.setValidating(true);
   DocumentBuilder builder = factory.newDocumentBuilder();
   Document doc = builder.parse("yourFile.xml");
   Element rootElement = doc.getDocumentElement();
   NodeList children = rootElement.getChildNodes();
   Node current = null;
   int count = children.getLength();
   for (int i = 0; i < count; i++) {
     current = children.item(i);
     if (current.getNodeType() == Node.ELEMENT_NODE) {
       Element element = (Element) current;
       if (element.getTagName().equalsIgnoreCase("tableOfContents")) {
         element.setAttribute("showPageNumbers", "no");
       }
     }
   }
   System.out.println(doc.getDocumentElement());
 }

}

</source>
   
  
 
  

Element: setAttribute(String name, String value)

   <source lang="java">

/*

<?xml version="1.0" encoding="UTF-8"?>
<book id="javanut4">
   <chapter>
      <title>Chapter 1</title>
      <para/>
   </chapter>
   <chapter>
      <title>Chapter 2</title>
      <para/>
   </chapter>
   <chapter>
      <title>Chapter 3</title>
      <para/>
   </chapter>
</book>
*/

import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.Document; import org.w3c.dom.Element; public class MainClass {

 public static void main(String[] args) throws Exception{
   DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
   DocumentBuilder db = dbf.newDocumentBuilder();
   Document document = db.newDocument();
   Element book = document.createElement("book"); 
   book.setAttribute("id", "javanut4");           
   document.appendChild(book);                    
   for(int i = 1; i <= 3; i++) {                  
       Element chapter = document.createElement("chapter");
       Element title = document.createElement("title");
       title.appendChild(document.createTextNode("Chapter " + i));
       chapter.appendChild(title);
       chapter.appendChild(document.createElement("para"));
       book.appendChild(chapter);
   }
   TransformerFactory tf = TransformerFactory.newInstance();
   Transformer transformer = tf.newTransformer();
   DOMSource source = new DOMSource(document);          
   StreamResult result = new StreamResult(System.out);  
   transformer.transform(source, result);
 }

}

      </source>
   
  
 
  

Element: String getTagName()

   <source lang="java">

import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class MainClass {

 public static void main(String[] args) throws Exception {
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   factory.setValidating(true);
   DocumentBuilder builder = factory.newDocumentBuilder();
   Document doc = builder.parse("yourFile.xml");
   Element rootElement = doc.getDocumentElement();
   NodeList children = rootElement.getChildNodes();
   Node current = null;
   for (int i = 0; i < children.getLength(); i++) {
     current = children.item(i);
     if (current.getNodeType() == Node.ELEMENT_NODE) {
       Element element = (Element) current;
       if (element.getTagName().equalsIgnoreCase("tableOfContents")) {
         rootElement.removeChild(element);
       }
     }
   }
   System.out.println(doc.getDocumentElement());
 }

}

</source>