import java.io.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;

public class DOMElements{
   static public void main(String[] arg){
	   try {
		   BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
		   System.out.print("Enter XML File name: ");
		   String xmlFile = bf.readLine();
		   File file = new File(xmlFile);
		   if(file.exists()){
			   // Create a factory
			   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			   // Use the factory to create a builder
			   DocumentBuilder builder = factory.newDocumentBuilder();
			   Document doc = builder.parse(xmlFile);
			   // Get a list of all elements in the document
			   NodeList list = doc.getElementsByTagName("*");
			   System.out.println("XML Elements: ");
			   for (int i=0; i<list.getLength(); i++) {
				   // Get element
				   Element element = (Element)list.item(i);
				   System.out.println(element.getNodeName());
			   }
		   }
		   else{
			   System.out.print("File not found!");
		   }
	   }
	   catch (Exception e) {
		   System.exit(1);
	   }
   }
}