JSF - Getting java.lang.NullPointerException -


error file here

java.lang.nullpointerexception     @ userdb.userdbbean.getresult(userdbbean.java:64)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:606)     @ javax.el.beanelresolver.getvalue(beanelresolver.java:363)     @ com.sun.faces.el.demuxcompositeelresolver._getvalue(demuxcompositeelresolver.java:176)     @ com.sun.faces.el.demuxcompositeelresolver.getvalue(demuxcompositeelresolver.java:203)     @ com.sun.el.parser.astvalue.getvalue(astvalue.java:140)     @ com.sun.el.parser.astvalue.getvalue(astvalue.java:204)     @ com.sun.el.valueexpressionimpl.getvalue(valueexpressionimpl.java:226)     @ com.sun.faces.facelets.el.tagvalueexpression.getvalue(tagvalueexpression.java:109)     @ javax.faces.component.componentstatehelper.eval(componentstatehelper.java:194)     @ javax.faces.component.componentstatehelper.eval(componentstatehelper.java:182)     @ javax.faces.component.uioutput.getvalue(uioutput.java:174)     @ com.sun.faces.renderkit.html_basic.htmlbasicinputrenderer.getvalue(htmlbasicinputrenderer.java:205)     @ com.sun.faces.renderkit.html_basic.htmlbasicrenderer.getcurrentvalue(htmlbasicrenderer.java:355)     @ com.sun.faces.renderkit.html_basic.htmlbasicrenderer.encodeend(htmlbasicrenderer.java:164)     @ javax.faces.component.uicomponentbase.encodeend(uicomponentbase.java:924)     @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1863)     @ javax.faces.render.renderer.encodechildren(renderer.java:176)     @ javax.faces.component.uicomponentbase.encodechildren(uicomponentbase.java:894)     @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1856)     @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1859)     @ javax.faces.component.uicomponent.encodeall(uicomponent.java:1859)     @ com.sun.faces.application.view.faceletviewhandlingstrategy.renderview(faceletviewhandlingstrategy.java:443)     @ com.sun.faces.application.view.multiviewhandler.renderview(multiviewhandler.java:131)     @ com.sun.faces.lifecycle.renderresponsephase.execute(renderresponsephase.java:120)     @ com.sun.faces.lifecycle.phase.dophase(phase.java:101)     @ com.sun.faces.lifecycle.lifecycleimpl.render(lifecycleimpl.java:219)     @ javax.faces.webapp.facesservlet.service(facesservlet.java:647)     @ org.apache.catalina.core.standardwrapper.service(standardwrapper.java:1682)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:318)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:160)     @ org.apache.catalina.core.standardpipeline.doinvoke(standardpipeline.java:734)     @ org.apache.catalina.core.standardpipeline.invoke(standardpipeline.java:673)     @ com.sun.enterprise.web.webpipeline.invoke(webpipeline.java:99)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:174)     @ org.apache.catalina.connector.coyoteadapter.doservice(coyoteadapter.java:357)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:260)     @ com.sun.enterprise.v3.services.impl.containermapper.service(containermapper.java:188)     @ org.glassfish.grizzly.http.server.httphandler.runservice(httphandler.java:191)     @ org.glassfish.grizzly.http.server.httphandler.dohandle(httphandler.java:168)     @ org.glassfish.grizzly.http.server.httpserverfilter.handleread(httpserverfilter.java:189)     @ org.glassfish.grizzly.filterchain.executorresolver$9.execute(executorresolver.java:119)     @ org.glassfish.grizzly.filterchain.defaultfilterchain.executefilter(defaultfilterchain.java:288)     @ org.glassfish.grizzly.filterchain.defaultfilterchain.executechainpart(defaultfilterchain.java:206)     @ org.glassfish.grizzly.filterchain.defaultfilterchain.execute(defaultfilterchain.java:136)     @ org.glassfish.grizzly.filterchain.defaultfilterchain.process(defaultfilterchain.java:114)     @ org.glassfish.grizzly.processorexecutor.execute(processorexecutor.java:77)     @ org.glassfish.grizzly.nio.transport.tcpniotransport.fireioevent(tcpniotransport.java:838)     @ org.glassfish.grizzly.strategies.abstractiostrategy.fireioevent(abstractiostrategy.java:113)     @ org.glassfish.grizzly.strategies.workerthreadiostrategy.run0(workerthreadiostrategy.java:115)     @ org.glassfish.grizzly.strategies.workerthreadiostrategy.access$100(workerthreadiostrategy.java:55)     @ org.glassfish.grizzly.strategies.workerthreadiostrategy$workerthreadrunnable.run(workerthreadiostrategy.java:135)     @ org.glassfish.grizzly.threadpool.abstractthreadpool$worker.dowork(abstractthreadpool.java:564)     @ org.glassfish.grizzly.threadpool.abstractthreadpool$worker.run(abstractthreadpool.java:544)     @ java.lang.thread.run(thread.java:744)

the method "getresult()" causing error when i'm trying set values input on form arrays i've created. keeps giving me null error, don't know why. feel i'm using wrong method change values, i'm not sure else can within bean.

try initializing 3 string varialbes -- ssn, age, , income -- "null", i.e. private string ssn = null;. in instances, have found there difference in java between not initializing object @ , initializing object null.


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