Check why your client variable is null. I think the problem lies there.
caoanhkiet wrote: > > Hi, > I have been following > http://cwiki.apache.org/WICKET/facebook-integration.html and version > tomcat 5.5.25. and ran NullPointerException. > > error at: client.friends_get(); > > SEVERE: Can't instantiate page using constructor public Login() > org.apache.wicket.WicketRuntimeException: Can't instantiate page using > constructor public Login() > at > org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:168) > at > org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:58) > at > org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:92) > at > org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:268) > at > org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:283) > at > org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:210) > at > org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91) > at > org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1166) > at org.apache.wicket.RequestCycle.step(RequestCycle.java:1243) > at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1331) > at org.apache.wicket.RequestCycle.request(RequestCycle.java:493) > at > org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:363) > at > org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:194) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) > at > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) > at > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) > at > org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) > at > org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) > at > org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) > at > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) > -- View this message in context: http://www.nabble.com/Facebook-Wicket-Integration-tp16558748p17098806.html Sent from the Wicket - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
