Re: parse HTML

I want to parse a HTML document to get all URLs of the frames in a
frameset. I get a "NullPointer Exception" in the System.out.println...

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Java Code:
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URL urlobj = new URL(str);

HttpURLConnection uc = null;
uc = (HttpURLConnection)urlobj.openConnection();
uc.setUseCaches(false);
DataInputStream is = new DataInputStream(uc.getInputStream());

HTMLEditorKit hKit = new HTMLEditorKit();
HTMLDocument hDoc = new HTMLDocument();
hKit.read(is, hDoc, 0);
HTMLDocument.Iterator it = hDoc.getIterator(HTML.Tag.FRAME);

AttributeSet attSet = it.getAttributes();
String s = (String)attSet.getAttribute(HTML.Attribute.SRC);
System.out.println(s);