java - LocalDateTime.now() throwing exception when called in a JavaFX context with observer -
i'm writing javafx application fxcontroller observer different class. need last time observer received notification update. problem i'm trying use java8 time api, localdatetime , everytime i'm calling localdatetime.now() it's giving me nullpointerexception pointing tzbd file doesn't exist.
however localdatetime.now() works on system if open console project , run code there.
is problem javafx then? workaround this?
code exception thrown :
public void gettimestamp() { localdatetime c = localdatetime.now(); system.out.println("grand total has been updated ... @ " + c); } @override public void update(observable o, object arg) { grandtotal.settext( integer.tostring( controller.getreg().getgrandtotal() ) ); system.out.println("update() called @ "); gettimestamp(); } here full exception stacktrace :
exception in thread "javafx application thread" java.lang.runtimeexception: java.lang.reflect.invocationtargetexception @ javafx.fxml.fxmlloader$methodhandler.invoke(fxmlloader.java:1774) @ javafx.fxml.fxmlloader$controllermethodeventhandler.handle(fxmlloader.java:1657) @ com.sun.javafx.event.compositeeventhandler.dispatchbubblingevent(compositeeventhandler.java:86) @ com.sun.javafx.event.eventhandlermanager.dispatchbubblingevent(eventhandlermanager.java:238) @ com.sun.javafx.event.eventhandlermanager.dispatchbubblingevent(eventhandlermanager.java:191) @ com.sun.javafx.event.compositeeventdispatcher.dispatchbubblingevent(compositeeventdispatcher.java:59) @ com.sun.javafx.event.basiceventdispatcher.dispatchevent(basiceventdispatcher.java:58) @ com.sun.javafx.event.eventdispatchchainimpl.dispatchevent(eventdispatchchainimpl.java:114) @ com.sun.javafx.event.basiceventdispatcher.dispatchevent(basiceventdispatcher.java:56) @ com.sun.javafx.event.eventdispatchchainimpl.dispatchevent(eventdispatchchainimpl.java:114) @ com.sun.javafx.event.basiceventdispatcher.dispatchevent(basiceventdispatcher.java:56) @ com.sun.javafx.event.eventdispatchchainimpl.dispatchevent(eventdispatchchainimpl.java:114) @ com.sun.javafx.event.eventutil.fireeventimpl(eventutil.java:74) @ com.sun.javafx.event.eventutil.fireevent(eventutil.java:49) @ javafx.event.event.fireevent(event.java:198) @ javafx.scene.node.fireevent(node.java:8413) @ javafx.scene.control.button.fire(button.java:185) @ com.sun.javafx.scene.control.behavior.buttonbehavior.mousereleased(buttonbehavior.java:182) @ com.sun.javafx.scene.control.skin.behaviorskinbase$1.handle(behaviorskinbase.java:96) @ com.sun.javafx.scene.control.skin.behaviorskinbase$1.handle(behaviorskinbase.java:89) @ com.sun.javafx.event.compositeeventhandler$normaleventhandlerrecord.handlebubblingevent(compositeeventhandler.java:218) @ com.sun.javafx.event.compositeeventhandler.dispatchbubblingevent(compositeeventhandler.java:80) @ com.sun.javafx.event.eventhandlermanager.dispatchbubblingevent(eventhandlermanager.java:238) @ com.sun.javafx.event.eventhandlermanager.dispatchbubblingevent(eventhandlermanager.java:191) @ com.sun.javafx.event.compositeeventdispatcher.dispatchbubblingevent(compositeeventdispatcher.java:59) @ com.sun.javafx.event.basiceventdispatcher.dispatchevent(basiceventdispatcher.java:58) @ com.sun.javafx.event.eventdispatchchainimpl.dispatchevent(eventdispatchchainimpl.java:114) @ com.sun.javafx.event.basiceventdispatcher.dispatchevent(basiceventdispatcher.java:56) @ com.sun.javafx.event.eventdispatchchainimpl.dispatchevent(eventdispatchchainimpl.java:114) @ com.sun.javafx.event.basiceventdispatcher.dispatchevent(basiceventdispatcher.java:56) @ com.sun.javafx.event.eventdispatchchainimpl.dispatchevent(eventdispatchchainimpl.java:114) @ com.sun.javafx.event.eventutil.fireeventimpl(eventutil.java:74) @ com.sun.javafx.event.eventutil.fireevent(eventutil.java:54) @ javafx.event.event.fireevent(event.java:198) @ javafx.scene.scene$mousehandler.process(scene.java:3757) @ javafx.scene.scene$mousehandler.access$1500(scene.java:3485) @ javafx.scene.scene.impl_processmouseevent(scene.java:1762) @ javafx.scene.scene$scenepeerlistener.mouseevent(scene.java:2494) @ com.sun.javafx.tk.quantum.glassvieweventhandler$mouseeventnotification.run(glassvieweventhandler.java:381) @ com.sun.javafx.tk.quantum.glassvieweventhandler$mouseeventnotification.run(glassvieweventhandler.java:295) @ java.security.accesscontroller.doprivileged(native method) @ com.sun.javafx.tk.quantum.glassvieweventhandler.lambda$handlemouseevent$354(glassvieweventhandler.java:417) @ com.sun.javafx.tk.quantum.quantumtoolkit.runwithoutrenderlock(quantumtoolkit.java:389) @ com.sun.javafx.tk.quantum.glassvieweventhandler.handlemouseevent(glassvieweventhandler.java:416) @ com.sun.glass.ui.view.handlemouseevent(view.java:555) @ com.sun.glass.ui.view.notifymouse(view.java:937) @ com.sun.glass.ui.gtk.gtkapplication._runloop(native method) @ com.sun.glass.ui.gtk.gtkapplication.lambda$null$49(gtkapplication.java:139) @ java.lang.thread.run(thread.java:745) caused by: java.lang.reflect.invocationtargetexception @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:498) @ sun.reflect.misc.trampoline.invoke(methodutil.java:71) @ sun.reflect.generatedmethodaccessor1.invoke(unknown source) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:498) @ sun.reflect.misc.methodutil.invoke(methodutil.java:275) @ javafx.fxml.fxmlloader$methodhandler.invoke(fxmlloader.java:1771) ... 48 more caused by: java.lang.error: java.io.filenotfoundexception: null/lib/tzdb.dat (no such file or directory) @ sun.util.calendar.zoneinfofile$1.run(zoneinfofile.java:261) @ java.security.accesscontroller.doprivileged(native method) @ sun.util.calendar.zoneinfofile.<clinit>(zoneinfofile.java:251) @ sun.util.calendar.zoneinfo.gettimezone(zoneinfo.java:589) @ java.util.timezone.gettimezone(timezone.java:560) @ java.util.timezone.setdefaultzone(timezone.java:666) @ java.util.timezone.getdefaultref(timezone.java:636) @ java.util.timezone.getdefault(timezone.java:625) @ java.time.zoneid.systemdefault(zoneid.java:274) @ java.time.clock.systemdefaultzone(clock.java:178) @ java.time.localdatetime.now(localdatetime.java:180) @ assignment.notifiers.beepmaker.playbeep(beepmaker.java:11) @ assignment.controller.registrationfxcontroller.calculatediscount(registrationfxcontroller.java:178) ... 58 more caused by: java.io.filenotfoundexception: null/lib/tzdb.dat (no such file or directory) @ java.io.fileinputstream.open0(native method) @ java.io.fileinputstream.open(fileinputstream.java:195) @ java.io.fileinputstream.<init>(fileinputstream.java:138) @ sun.util.calendar.zoneinfofile$1.run(zoneinfofile.java:255) ... 70 more process finished exit code 0
found problem. had configloader class overriding java_home. used system.setproperty(key, value) instead of system.setproperties(property)
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