java.lang.NullPointerException

Coderanch | Jeremy McNally | 3 years ago
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    Can't get my DBConnection (JDBC) - Really need help

    Coderanch | 3 years ago | Jeremy McNally
    java.lang.NullPointerException
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    Android: Saving Map State in Google map

    Stack Overflow | 11 months ago | Junie Negentien
    java.lang.RuntimeException: Unable to resume activity {com.ourThesis.junieNegentien2015/com.ourThesis.junieNegentien2015.MainActivity}: java.lang.NullPointerException
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at com.docm.dao.AddDoctorDAO.persist()
    2. com.docm.dao
      AddDoctorDAO.persist
      1. com.docm.dao.AddDoctorDAO.persist(AddDoctorDAO.java:19)
      1 frame
    3. com.docm.servlets
      AddDoctorServlet.doPost
      1. com.docm.servlets.AddDoctorServlet.doGet(AddDoctorServlet.java:38)
      2. com.docm.servlets.AddDoctorServlet.doPost(AddDoctorServlet.java:53)
      2 frames
    4. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:688)
      2. javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
      2 frames
    5. Glassfish Core
      CoyoteAdapter.service
      1. org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
      2. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
      3. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
      4. org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
      5. org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
      6. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
      7. org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
      8. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
      8 frames
    6. Kernel Classes
      ContainerMapper.service
      1. com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
      2. com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
      2 frames
    7. Grizzly WS
      AbstractThreadPool$Worker.run
      1. com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
      2. com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
      3. com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
      4. com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
      5. com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
      6. com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
      7. com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
      8. com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
      9. com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
      10. com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
      11. com.sun.grizzly.ContextTask.run(ContextTask.java:71)
      12. com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
      13. com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
      13 frames
    8. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:724)
      1 frame