XML processor can have ErrorHandler, EntityResolver, ContentHandler,
DTDHandler set to null in Sax 2.0.1.
###@###.### 2003-08-19

------------------------------------------------
Tue Aug 26 11:35:08 EDT 2003 G. Todd Miller :

I tried to verify this bug in Tiger, but it appears to be still broken.
Here is a sample program to demonstrate the null pointer exception:

import org.w3c.dom.*;
import org.xml.sax.*;
import org.w3c.dom.ls.*;
import javax.xml.parsers.*;

public class Test {
    public static void main(String[] args){
        Test app = new Test();
        app.run();
    }
    public void run() {
        try {
            SAXParserFactory spf = SAXParserFactory.newInstance();
            SAXParser sp = spf.newSAXParser();
            XMLReader reader = sp.getXMLReader();
            reader.setErrorHandler(null); // SAX 2.0.1 allows
            reader.setContentHandler(null); // SAX 2.0.1 allows
            reader.setEntityResolver(null); // SAX 2.0.1 allows
            reader.setDTDHandler(null); // SAX 2.0.1 allows
        }
        catch (ParserConfigurationException e){
            System.out.println("ParserConfigurationException thrown");
        }
        catch (SAXException e){
            System.out.println("SAXException thrown");
        }
        catch (NullPointerException e){
            System.out.println("NullPointerException thrown");
            e.printStackTrace();
        }
    }
}

---- Output from running with Tiger ----
% java -version
java version "1.5.0-internal"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-internal-_14_aug_2003_22_01)
Java HotSpot(TM) Client VM (build 1.5.0-beta-b15, mixed mode)

% javac Test.java
% java -cp . Test

NullPointerException thrown
java.lang.NullPointerException
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.setErrorHandler(AbstractSAXParser.java:1291)
        at Test.run(Test.java:16)
        at Test.main(Test.java:9)