NullPointerException

[preethi Ayyappan]

Hi, i am getting the following error when i run my code.
I think i am using null where the object is required.but i dont know how to solve it.Anyone help me please.

   
public class OutboundServlet1 extends HttpServlet {
private ManagerConnection managerConnection;
protected AbstractMeetMeEvent abstractMeetme;
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
PrintWriter out = response.getWriter();
String exten = request.getParameter("extension");
String agent = request.getParameter("agent");
String meetMe="21045";
try {
ManagerConnectionFactory factory = new ManagerConnectionFactory(
"localhost", "admin", "1234"); //
this.managerConnection = factory.createManagerConnection();
 
OriginateAction originateAction;
ManagerResponse originateResponse;
originateAction = new OriginateAction();
AgentCallbackLogin=new AgentCallbackLoginAction(agent,exten);
 
originateAction.setChannel("local" + '/' + "5102");
originateAction.setContext("default");
originateAction.setExten(exten);
originateAction.setPriority(new Integer(1));
 
originateAction.setTimeout(new Integer(30000));
 
abstractMeetme.getMeetMe();
managerConnection.login();
originateResponse = managerConnection.sendAction(originateAction,
30000);
 
managerConnection.logoff();
out.println("OK");
} catch (Exception e) {
out.println("NOT OK");
e.printStackTrace();
}
}
}
 

The following is the error.

java.lang.NullPointerException
at com.example.servlets.OutboundServlet1.doGet(OutboundServlet1.java:67)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
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:174)
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:619)

[ April 03, 2008: Message edited by: preethi Ayyappan ]

[ April 03, 2008: Message edited by: preethi Ayyappan ]
[ April 03, 2008: Message edited by: preethi Ayyappan ]

[Nitesh Kant]

Line number 67 of your servlet is throwing the exception.
Just check whatever objects you have there, can they be null?
If yes, then either do a null check or make sure they are non null.

[preethi Ayyappan]

Thanks.The below line is line no:67.

abstractMeetme.getMeetMe();

getMeetMe() is the method of the abstract class AbstractMeetMeEvent.In the definition for the AbstractMeetMeEvent.java, the following is given.

protected AbstractMeetMeEvent(Object source)
{
super(source);
}

Now what i have to do in my code.If it needs an object,what should i do there?please guide me.

[Campbell Ritchie]

It would appear that you have no object associated with the variable abstractMeetMe. Check carefully where that object is supposed to be initialised.

If that doesn't help, make sure the meetMe variable is not null.