Here you can find the source of getRootElement(Document doc)
public static Element getRootElement(Document doc)
//package com.java2s; //License from project: Apache License import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; public class Main { public static Element getRootElement(Document doc) { Node node = doc.getFirstChild(); while (node != null) { if (node.getNodeType() == Node.ELEMENT_NODE) return (Element) node; node = node.getNextSibling(); }/*from w w w. j a v a2 s . co m*/ return null; } }