SAX

package saxblatt;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class GetCode extends DefaultHandler{
  public StringBuffer result = new StringBuffer();
  String lang;
  String theClass;
  public GetCode(String lang, String theClass) {
    super();
    this.lang = lang;
    this.theClass = theClass;
  }
  boolean collect = false;
  int innerCode = 0;
  
  @Override
  public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
    innerCode++;
    if (qName.equals("code") 
        && theClass.equals(attributes.getValue("class"))
        && lang.equals(attributes.getValue("lang"))){
      collect = true;
      innerCode = 0;
    }
    
  }
  
  @Override
  public void endElement(String uri, String localName, String qName) throws SAXException {
    if (qName.equals("code") && innerCode==0) collect=false;
    innerCode--;
  }
  
  @Override
  public void characters(char[] ch, int start, int length) throws SAXException {
    if (collect)result.append(new String(ch,start,length));
  }
}