How to get nodes and its attributes of an XML file usiong DOM parsing?

how to get nodes and its attributes of an XML file usiong DOM parsing?
i am new to XML parsing.......
Thanking you........

import org.w3c.dom.Document;
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;      ...
//Setup the document
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
     DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
     Document doc = docBuilder.parse (new File("MY_XML_FILE.xml"));
//get elemets by name
     String elementValue = doc.getElementsByTagName("MY_ELEMENT").item(0).getTextContent();
//This method can return multiple nodes, in this instance I get item(0) , first nodeRead the api for other methods of getting data.

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