java.lang.NullPointerException

GitHub | wildfly-ci | 1 year ago
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    Getting a nullpointer exception when switching displayables in J2ME

    Stack Overflow | 6 years ago | Pallinder
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179
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    J2ME (Java) - Null Pointer Exception caught in Display Class

    Stack Overflow | 6 years ago | Tom
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179
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    Cloud Foundry v2 in Grails

    Stack Overflow | 2 years ago | angelo087
    java.lang.NullPointerException: Cannot invoke method getAt() on null object

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at io.undertow.security.impl.AbstractSecurityContext.authenticationComplete()
    2. Undertow Core
      AbstractSecurityContext.authenticationComplete
      1. io.undertow.security.impl.AbstractSecurityContext.authenticationComplete(AbstractSecurityContext.java:86)
      2. io.undertow.security.impl.AbstractSecurityContext.authenticationComplete(AbstractSecurityContext.java:78)
      2 frames
    3. org.picketlink.identity
      SPFormAuthenticationMechanism.authenticate
      1. org.picketlink.identity.federation.bindings.wildfly.sp.SPFormAuthenticationMechanism.register(SPFormAuthenticationMechanism.java:408)
      2. org.picketlink.identity.federation.bindings.wildfly.sp.SPFormAuthenticationMechanism.handleSAML2Response(SPFormAuthenticationMechanism.java:580)
      3. org.picketlink.identity.federation.bindings.wildfly.sp.SPFormAuthenticationMechanism.handleSAMLResponse(SPFormAuthenticationMechanism.java:313)
      4. org.picketlink.identity.federation.bindings.wildfly.sp.SPFormAuthenticationMechanism.authenticate(SPFormAuthenticationMechanism.java:275)
      4 frames
    4. Undertow Core
      SecurityContextImpl.authenticate
      1. io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:233)
      2. io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:250)
      3. io.undertow.security.impl.SecurityContextImpl$AuthAttempter.access$100(SecurityContextImpl.java:219)
      4. io.undertow.security.impl.SecurityContextImpl.attemptAuthentication(SecurityContextImpl.java:121)
      5. io.undertow.security.impl.SecurityContextImpl.authTransition(SecurityContextImpl.java:96)
      6. io.undertow.security.impl.SecurityContextImpl.authenticate(SecurityContextImpl.java:89)
      6 frames
    5. Undertow Servlet
      ServletAuthenticationCallHandler.handleRequest
      1. io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:55)
      1 frame
    6. Undertow Core
      AbstractConfidentialityHandler.handleRequest
      1. io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33)
      2. io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
      3. io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51)
      4. io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
      4 frames
    7. Undertow Servlet
      ServletSecurityConstraintHandler.handleRequest
      1. io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
      2. io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:56)
      2 frames
    8. Undertow Core
      AuthenticationMechanismsHandler.handleRequest
      1. io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
      1 frame
    9. Undertow Servlet
      CachedAuthenticatedSessionHandler.handleRequest
      1. io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72)
      1 frame
    10. Undertow Core
      PredicateHandler.handleRequest
      1. io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
      2. io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
      3. io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
      3 frames
    11. WildFly: Undertow
      JACCContextIdHandler.handleRequest
      1. org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
      1 frame
    12. Undertow Core
      PredicateHandler.handleRequest
      1. io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
      2. io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
      2 frames
    13. Undertow Servlet
      ServletInitialHandler$1.handleRequest
      1. io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
      2. io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
      3. io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
      4. io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
      4 frames
    14. Undertow Core
      HttpServerExchange$1.run
      1. io.undertow.server.Connectors.executeRootHandler(Connectors.java:198)
      2. io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:784)
      2 frames
    15. Java RT
      Thread.run
      1. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      3. java.lang.Thread.run(Thread.java:745)
      3 frames