SAXParserFactory.setValidating( true )

Question

To my understanding, this command causes the SAXParserFactory instance to generate "validating" SAXParser instances.
However, when I parse an invalid xml document (ie one that does not comply to its dtd) with the SAXParser then given by "factory.getSAXParser()", it throws no exception. Am I misunderstanding the meaning of "validating", or is this feature not working?
code:
public static void main(String argv[])
if (argv.length != 2) {
System.err.println("Usage: cmd <filename> <echo|debug>");
System.exit(1);
// Use an instance of ourselves as the SAX event handler
DefaultHandler handler = new Echo01( argv[1] );
// Use the default (non-validating) parser
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating( true );
try {
// Set up output stream
out = new OutputStreamWriter(System.out, "UTF8");
// Parse the input
SAXParser saxParser = factory.newSAXParser();
saxParser.parse( new File(argv[0]), handler);
} catch (Throwable t) {
t.printStackTrace();
System.exit(0);

Answer 1

http://forum.java.sun.com/thread.jsp?forum=34&thread=394211