Delete the First Child of the Root Node, XML,XML Tutorials,Online XML Tutorial,XML Help Tutorials

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