Delete the First Child of the Root Node

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


 

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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


Download Source Code

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