I am fairly new to the Google API's and wanted to use the Picasa API.
Unfortunately I haven't been very succesful. I read the getting
started guide and was getting nullpointers. So I turned to the samples
that come with the download (PicasawebClient & PicasawebCommandLine).
But when I run the CommandLine one (in Eclipse) I get the following
stacktrace after I choose to list my albums:
Please enter Username:
cvdnthillart
Please enter Password:
Ccomp1978
Main Menu:
0) Exit Program
1) Show albums
2) Show user tags
Please enter Action:
1
Get Feed URL: http://picasaweb.google.com/data/feed/api/user/default
Exception in thread "main" java.lang.NullPointerException
        at com.google.gdata.data.Kind.getAdaptorClass(Kind.java:241)
        at com.google.gdata.data.Kind.getAdaptor(Kind.java:295)
        at com.google.gdata.data.Category
$AtomHandler.processEndElement(Category.java:294)
        at com.google.gdata.util.XmlParser.endElement(XmlParser.java:996)
        at org.xml.sax.helpers.ParserAdapter.endElement(ParserAdapter.java:
626)
        at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:
593)
        at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:
180)
        at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:
377)
        at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2747)
        at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:
648)
        at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:
140)
        at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:
510)
        at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:
807)
        at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:
737)
        at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:
107)
        at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:
1205)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl
$JAXPSAXParser.parse(SAXParserImpl.java:522)
        at org.xml.sax.helpers.ParserAdapter.parse(ParserAdapter.java:405)
        at com.google.gdata.util.XmlParser.parse(XmlParser.java:677)
        at com.google.gdata.util.XmlParser.parse(XmlParser.java:568)
        at com.google.gdata.data.BaseFeed.parseAtom(BaseFeed.java:838)
        at
com.google.gdata.wireformats.input.AtomDataParser.parse(AtomDataParser.java:
68)
        at
com.google.gdata.wireformats.input.AtomDataParser.parse(AtomDataParser.java:
39)
        at
com.google.gdata.wireformats.input.CharacterParser.parse(CharacterParser.java:
100)
        at
com.google.gdata.wireformats.input.XmlInputParser.parse(XmlInputParser.java:
52)
        at
com.google.gdata.wireformats.input.AtomDualParser.parse(AtomDualParser.java:
66)
        at
com.google.gdata.wireformats.input.AtomDualParser.parse(AtomDualParser.java:
34)
        at com.google.gdata.client.Service.parseResponseData(Service.java:
2036)
        at com.google.gdata.client.Service.getFeed(Service.java:1074)
        at com.google.gdata.client.Service.getFeed(Service.java:936)
        at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:
631)
        at com.google.gdata.client.Service.getFeed(Service.java:955)
        at sample.photos.PicasawebClient.getFeed(PicasawebClient.java:224)
        at sample.photos.PicasawebClient.getAlbums(PicasawebClient.java:82)
        at sample.photos.PicasawebClient.getAlbums(PicasawebClient.java:100)
        at
sample.photos.PicasawebCommandLine.showAlbums(PicasawebCommandLine.java:
112)
        at
sample.photos.PicasawebCommandLine.mainLoop(PicasawebCommandLine.java:
99)
        at sample.photos.PicasawebCommandLine.main(PicasawebCommandLine.java:
79)

And I have made an album on my Picasa account. Also the feed URL is
working in Chrome.
Does anyone have any idea why I am getting these errors?

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