import java.io.*;

import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory;  

import org.xml.sax.InputSource;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

public class MyXMLParser
{
	String xmlString;

	static Document document;
	
	public MyXMLParser(String myXmlString){
		try {
			xmlString = myXmlString;
			
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			factory.setValidating(false);
			factory.setNamespaceAware(false);
			
			DocumentBuilder builder = factory.newDocumentBuilder();
			document = builder.parse(new InputSource(new StringReader(xmlString)));

		} catch (Throwable e) {
			e.printStackTrace();
		}
	}
	
	public String getElementValueByName(String nodeName)
	{
		NodeList nodes = document.getElementsByTagName(nodeName);
		if( nodes.getLength() < 1 ){
			return new String("");
		}else{
			return nodes.item(0).getFirstChild().getNodeValue();
		}
	}
}