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problem while running application struts

Sakshi Bhatnagar
Greenhorn

Joined: Feb 06, 2013
Posts: 2
hi
I have developed a project using struts and evrything worked fine except one exception.I am not understanding the meaning of the exception.Kindly tell me what is the problem with my code.
here is the exception I am getting:

java.lang.NullPointerException: replacement
at java.util.regex.Matcher.replaceFirst(Matcher.java:949)
at java.lang.String.replaceFirst(String.java:2167)
at global.utility.HelperClass.populateQuery(HelperClass.java:24)
at global.utility.listPage.dao.ListPageDAO.getListPageData(ListPageDAO.java:54)
at global.utility.listPage.delegate.ListPageDelegate.getListPageData(ListPageDelegate.java:24)
at global.utility.listPage.util.ListpageUtil.getListPage(ListpageUtil.java:139)
at global.utility.listPage.action.ListPageACTION.LISTPAGE(ListPageACTION.java:86)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:216)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:403)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:301)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:162)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
objStatus:::null
T Mishra
Ranch Hand

Joined: Apr 04, 2006
Posts: 107

Its a null pointer exception. Please check the reference / object getting passed into the methods as specified in the package below


Thanks,
Tushar (SCJP 1.5)
 
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subject: problem while running application struts
 
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