Hi All, I wanted to pass an object from one page to another page,so I set an object into a parameter: PageParameters para=new PageParameters(); para.put("result",resultList);//resultList is a List contains some pojo. //jump to another page setResponsePage(DeviceEnquiry.class,para);
Then at DeviceEnquiry.java ,I want to get resultList: class DeviceEnquiry extends WebPage { public DeviceEnquiry (PageParameters param) { List list = (List)param.get("result"); //.... } } But I got an exception: WicketMessage: Can't instantiate page using constructor public com.hk.xportal.xseries.enquiry.DeviceEnquiry(org.apache.wicket.PageParameters) and argument result = "[EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]" Root cause: java.lang.ClassCastException: [Ljava.lang.String; at com.hk.xportal.xseries.enquiry.DeviceEnquiry.<init>(DeviceEnquiry.java:16) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:494) at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:147) at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:88) 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:1171) at org.apache.wicket.RequestCycle.step(RequestCycle.java:1248) at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1349) at org.apache.wicket.RequestCycle.request(RequestCycle.java:493) at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387) at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:199) 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) at java.lang.Thread.run(Thread.java:595) Complete stack: org.apache.wicket.WicketRuntimeException: Can't instantiate page using constructor public com.hk.xportal.xseries.enquiry.DeviceEnquiry(org.apache.wicket.PageParameters) and argument result = "[EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]" at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:168) at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:88) 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:1171) at org.apache.wicket.RequestCycle.step(RequestCycle.java:1248) at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1349) at org.apache.wicket.RequestCycle.request(RequestCycle.java:493) at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387) //....