Delete a Tree Node in Java
Description
The following code shows how to delete a Tree Node.
Example
import java.io.StringReader;
import java.io.StringWriter;
//from ww w .j a v a 2 s . c o m
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;
public class Main {
static public void main(String[] arg) throws Exception {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(true);
dbf.setNamespaceAware(true);
dbf.setIgnoringElementContentWhitespace(true);
DocumentBuilder builder = dbf.newDocumentBuilder();
StringReader sr = new StringReader("<tag>java2s.com</tag>");
Document document = builder.parse(new InputSource(sr));
deleteFirstElement(document);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer trans = tf.newTransformer();
StringWriter sw = new StringWriter();
trans.transform(new DOMSource(document), new StreamResult(sw));
System.out.println(sw.toString());
}
public static void deleteFirstElement(Document doc) {
Element root = doc.getDocumentElement();
if(root.getFirstChild() instanceof Element){
Element child = (Element)root.getFirstChild();
root.removeChild(child);
}
}
}