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With a pull parser, you get the next node, whatever it happens to be, at any point in the code that you ask for it.
So it is easy to vary the way you process text (for example), because you can process it multiple places in the program (for more detail, see Further Information).
The details of that process are highlighted in When to Use DOM in the next chapter.
For simpler applications, that complexity may well be unnecessary.
This section examines an example JAXP program, , are needed to provide hash tables and output.
Both of these public void start Document() throws SAXException public void start Element(String namespace URI, String local Name, String q Name, Attributes atts) throws SAXException public void end Document() throws SAXException method defined in Setting Up I/O.You could start using your parser now, but it is safer to implement some error handling.The parser can generate three kinds of errors: a fatal error, an error, and a warning.But for nonfatal errors and warnings, exceptions are never generated by the default error handler, and no messages are displayed.As shown in Document Events, the application's event handling methods throw can be constructed using a message, another exception, or both.