Move all children of the element in front of the element : Node « XML « Java Tutorial

1. Java Tutorial
2. XML
3. Node

import java.io.File;

import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

public class Main {
  public static void main(String[] argv) throws Exception {

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setValidating(true);

    factory.setExpandEntityReferences(false);

    Document doc = factory.newDocumentBuilder().parse(new File("filename"));
    Element element = (Element) doc.getElementsByTagName("b").item(0);

    Node parent = element.getParentNode();

    while (element.hasChildNodes()) {
      parent.insertBefore(element.getFirstChild(), element);
    }

  }
}