I can't understand something with "SAXParserFactory"

Question

javax.xml.SAXParserFactory abstract class uses the way below to create an SAX Parser:
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.netSAXParser();I have a look at the javax.xml.SAXParserFactory source, it's the fragment of the source:
public static SAXParserFactory newInstance() {
        try {
            return (SAXParserFactory) FactoryFinder.find(
                /* The default property name according to the JAXP spec */
                "javax.xml.parsers.SAXParserFactory",
                /* The fallback implementation class name */
                "com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl");
        } catch (FactoryFinder.ConfigurationError e) {
            throw new FactoryConfigurationError(e.getException(),
                                                e.getMessage());
    }the method gave out an method "FactoryFinder.find()", but i can't find it out in the j2skd1.5.0,and it hasn't been imported in the source.
I want to know, what's the "FactoryFinder" is ? and what's its method "find()" is?

Answer 1

I don't use any IDE but jus a NodePad.
U said that the FactoryFinder is already contained in the package, so can u tell me which package?
But i have searched FactoryFinder in the JavaDoc 1.4.1(while i use J2SDK 1.5.0Beta),and i can't have a class called FactoryFinder.( I search in the JavaDoc by the Letter Index)