Delete the First Child of the Root Node

In this section, you well learn how to delete the first child of the root node.

In this section, you well learn how to delete the first child of the root node.

Delete the First Child of the Root Node

This Example describes a method to Delete the first child of the Root node .Methods which are used for Deleting the child of the root node in a DOM tree are described below :-

Element root = doc.getDocumentElement():- Allows direct access to the root of the DOM document.

root.removeChild():-This method removes the Child node.

 Xml code for the program generated is:-

<?xml version="1.0" encoding="UTF-8"?>

<Company>
    <Location>
        <Companyname>Roseindia .Net</Companyname>
        <Employee>Girish Tewari</Employee>
    </Location>
</Company>

Deletefirstchild.java

/* 

         * @Program that Delete the First Child of the Root Node

         * Deletefirstchild.java 

         * Author:-RoseIndia Team

         * Date:-09-Jun-2008

         */

        

        import java.io.*;

        import javax.xml.parsers.*;

        import org.w3c.dom.*;

        

        public class Deletefirstchild {

        

          public static void main(String[] args) throws Exception {

          boolean validating = false;

          DocumentBuilderFactory factory = 

  DocumentBuilderFactory.newInstance();

          factory.setValidating(validating);

          Document doc = factory.newDocumentBuilder().parse(

  new File("Document4.xml"));

          new Deletefirstchild().deleteFirstElement(doc);

          }

        

          public void deleteFirstElement(Document doc) {

          Element root = doc.getDocumentElement();

          //returns the first child of the Root

          //Node child = root.getFirstChild();

          System.out.println("Length of root before deleting node is:"+

  root.getChildNodes().getLength());

         // Deletes the First Child of the Root Node

          root.removeChild(root.getFirstChild());

         System.out.println("Length of root after deleting node is:"+

  root.getChildNodes().getLength());

          

          }

        }

Output of the program

Length of root before deleting node is: 3
Length of root after deleting node is: 2

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