'Filerules' will not be null, because it is newly created, but that
doesn't mean that the file exists or that it is readable, etc.
Possibly try checking Filerules.exists(), Filerules.isFile(),
Filerules.canRead() ?
On Apr 6, 2005 6:58 PM, Raymond Hooker (rhooker) <[EMAIL PROTECTED]> wrote:
> Pardon the basic question but I cannot see what the problem is. I was
> going through the SAX tutorials using Eclipse 3.0.2 and Java SDK
> 1.4.2_07. Anyhow the following code gets throws
> java.lang.NullPointerException:
>
> String rulesFile =
> fileDialog.getDirectory()+fileDialog.getFile();
> // Use an instance of ourselves as the SAX event handler
> DefaultHandler handler = new Echo();
>
> // Use the default (non-validating) parser
> SAXParserFactory factory =
> SAXParserFactory.newInstance();
> try {
> // Set up output stream
> out = new OutputStreamWriter(System.out, "UTF8");
>
> // Parse the input
> File Filerules = new File(rulesFile);
> SAXParser saxParser = factory.newSAXParser();
> saxParser.parse( Filerules, handler );
> <----Exception occurs here
>
> } catch (Throwable t) {
> t.printStackTrace();
> }
>
> I verified that by a breakpoint that the time of exception Filerules was
> File object that is not null, and handler is a Echo instance. Echo is
> class that extends DefaultHandler. Echo has a number of methods to
> handle events like startDocument and startElement. According to the
> JavaDoc, I don't believe that the parse method is supposed to throw a
> nullPointerException. BTW the actual stack trace is:
>
> java.lang.NullPointerException
> at
> org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:691)
> at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
> at
> org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
> at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
> at javax.xml.parsers.SAXParser.parse(SAXParser.java:281)
> at Tree.rulesTree.main(rulesTree.java:103)
>
> I have tried various file contents.
>
> Ray
>
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>
--
~akb
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