import java.io.File;
import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
public class Main {
public static void main(String[] args) throws Exception {
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));
int eventTypeID = reader.nextTag();
reader.require(XMLStreamConstants.START_ELEMENT, null, "person");
eventTypeID = reader.nextTag();
reader.require(XMLStreamConstants.START_ELEMENT, null, "first_name");
System.out.println(reader.getElementText());
}
}