My program has the following questions. You can't pass the compile. Who can help me answer:
HTTP STATUS 500 -
TYPE EXCEPTION Report
Message
Description The Server Encountered An Internal Error () That Prevented It from fulventing this request.
EXCEPTION
Org.apache.jasper.jasperexception: Attempted a bean operation on a null object.
At Org.Apache.jasper.Runtime.jspruntimelibrary.HandlegetProperty (jspruntimelibrary.java: 511)
At Org.Apache.jsp.sample1_jsp._jspservice (Sample1_jsp.java: 72)
At Org.Apache.jasper.Runtime.httpjspBase.Service (httpjspbase.java: 137)
At javax.servlet.http.httpservlet.service (httpservlet.java: 853)
At Org.Apache.jasper.Servlet.jspservletWrapper.Service (jspservletwrapper.java: 210)
At Org.Apache.jasper.Servlet.jspservlet.ServiceJspfile (jspservlet.java: 295)
At Org.Apache.jasper.Servlet.jspservlet.Service (jspservlet.java: 241)
At javax.servlet.http.httpservlet.service (httpservlet.java: 853)
At Org.Apache.catalina.core.ApplicationFilterchain.internalDofilter (ApplicationFilterchain.java: 247)
At Org.Apache.catalina.core.ApplicationFilterchain.dofilter (ApplicationFilterchain.java: 193)
At Org.apache.catalina.core.StandardWrapperValve.Invoke (StandardWrapperValve.java: 256)
At Org.apache.catalina.core.standardpipeline $ StandardPipeLineValveContext.Invokenext (StandardPipeline.java: 643)
At Org.Apache.catalina.core.standardpipeline.Invoke (StandardPipeline.java: 480)
At Org.Apache.catalina.core.containerbase.invoke (containerbase.java:995)
At Org.Apache.catalina.core.standardContextValve.invoke (StandardContextValve.java: 191)
At Org.apache.catalina.core.standardpipeline $ StandardPipeLineValveContext.Invokenext (StandardPipeline.java: 643)
At Org.Apache.catalina.core.standardpipeline.Invoke (StandardPipeline.java: 480)
At Org.Apache.catalina.core.containerbase.invoke (containerbase.java:995) at Org.Apache.catalina.core.standardContext.invoke (StandardContext.java: 2417)
At Org.Apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java: 180)
At Org.apache.catalina.core.standardpipeline $ StandardPipeLineValveContext.Invokenext (StandardPipeline.java: 643)
At Org.Apache.catalina.valves.ErrordispatcherValve.Invoke (ErrorDispatcherValve.java: 171)
At Org.Apache.catalina.core.standardpipeline $ StandardPipeLineValveContext.invokenext (StandardPipeline.java: 641)
At Org.Apache.catalina.valves.ErrorReportvalve.invoke (ErrorReportvalve.java: 172)
At Org.Apache.catalina.core.standardpipeline $ StandardPipeLineValveContext.invokenext (StandardPipeline.java: 641)
At Org.Apache.catalina.core.standardpipeline.Invoke (StandardPipeline.java: 480)
At Org.Apache.catalina.core.containerbase.invoke (containerbase.java:995)
At Org.Apache.catalina.core.standardEngineValve.Invoke (StandardEngineValve.java: 174)
At Org.apache.catalina.core.standardpipeline $ StandardPipeLineValveContext.Invokenext (StandardPipeline.java: 643)
At Org.Apache.catalina.core.standardpipeline.Invoke (StandardPipeline.java: 480)
At Org.Apache.catalina.core.containerbase.invoke (containerbase.java:995)
At Org.Apache.coyote.tomcat4.coyoteAdapter.Service (CoyoteApterapter.java:193)
At Org.Apache.coyote.http11.http11processor.Process (http11processor.java: 781)
At Org.Apache.coyote.http11.http11protocol $ http11connectionHandler.ProcessConnection (http11protocol.java: 549)
At Org.apache.tomcat.util.Net.tcpWorkerthread.Runit (pooltcpendpoint.java: 589)
At Org.Apache.tomcat.util.threads.threadPool $ Controlrunnable.Run (threadpool.java: 666)
At java.lang.thread.run (thread.java:534)
