NullPointerException on facebook login using servlet

Posted by khoyendra on Stack Overflow See other posts from Stack Overflow or by khoyendra
Published on 2010-06-11T15:37:15Z Indexed on 2010/06/11 15:53 UTC
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facebook

after solve class notfound exeption i have to find error when i login in face book using given example

http://code.google.com/p/facebook-java-api/wiki/Examples

java.lang.NullPointerException
    com.google.code.facebookapi.ExtensibleClient.<init>(ExtensibleClient.java:111)
    com.google.code.facebookapi.ExtensibleClient.<init>(ExtensibleClient.java:99)
    com.google.code.facebookapi.ExtensibleClient.<init>(ExtensibleClient.java:95)
    com.google.code.facebookapi.FacebookXmlRestClientBase.<init>(FacebookXmlRestClientBase.java:44)
    com.google.code.facebookapi.FacebookXmlRestClient.<init>(FacebookXmlRestClient.java:10)
    FaceBookCrawl.FacebookUserFilter.doFilter(FacebookUserFilter.java:107)
    FaceBookCrawl.FacebookUserFilter.doPost(FacebookUserFilter.java:181)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

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