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Thread: getting NPException while running my struts first application using tomcat

  1. #1
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    Default getting NPException while running my struts first application using tomcat

    Hi,

    What are the possibilities of getting null-pointer exception in java?

    Please help me out from this NullPointerException for my application -
    When i send a string form my login page, it is unable to forward to the target page..I am using default struts-config.xml. able to identify ActionServlet also. please suggest me why iam geting this exception here?

    HTTP Status 500 -

    type Exception report

    message

    description The server encountered an internal error () that prevented it from fulfilling this request.

    exception

    javax.servlet.ServletException: java.lang.NullPointerException
    org.apache.struts.chain.ComposableRequestProcessor .process(ComposableRequestProcessor.java:286)
    org.apache.struts.action.ActionServlet.process(Act ionServlet.java:1913)
    org.apache.struts.action.ActionServlet.doGet(Actio nServlet.java:449)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:621)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:722)

    root cause

    java.lang.NullPointerException
    org.apache.struts.config.FormBeanConfig.createActi onForm(FormBeanConfig.java:289)
    org.apache.struts.config.FormBeanConfig.createActi onForm(FormBeanConfig.java:357)
    org.apache.struts.chain.commands.CreateActionForm. execute(CreateActionForm.java:92)
    org.apache.struts.chain.commands.ActionCommandBase .execute(ActionCommandBase.java:51)
    org.apache.commons.chain.impl.ChainBase.execute(Ch ainBase.java:191)
    org.apache.commons.chain.generic.LookupCommand.exe cute(LookupCommand.java:305)
    org.apache.commons.chain.impl.ChainBase.execute(Ch ainBase.java:191)
    org.apache.struts.chain.ComposableRequestProcessor .process(ComposableRequestProcessor.java:283)
    org.apache.struts.action.ActionServlet.process(Act ionServlet.java:1913)
    org.apache.struts.action.ActionServlet.doGet(Actio nServlet.java:449)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:621)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:722)
    Thanks in advance
    Last edited by rafishaik999; September 11th, 2011 at 06:16 AM. Reason: want to be more specific...


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    Default Re: getting NPException while running my struts first application using tomcat

    You are getting NullPointerException when trying to access properties/methods of an object which has not been initialized before.
    Please post your Action class code here.

    java memory
    Last edited by namhm; December 4th, 2011 at 06:50 PM.

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