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Java Build a JavaFX Application Build a Pomodoro App Explore Existing Code

Posted by Sigurjon Johannesson
Sigurjon Johannesson
5,453 Points

Excepiton error

Exception in Application start method java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389) at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767) Caused by: java.lang.RuntimeException: Exception in Application start method at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917) at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.NullPointerException at com.teamtreehouse.pomodoro.Main.start(Main.java:15) at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863) at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326) at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) Exception running application com.teamtreehouse.pomodoro.Main

This keeps happening to me when I run the code! and can't fix it. Any sugestions?

Tyler B
Tyler B
5,787 Points
Tyler B
Tyler B
5,787 Points

Can you post some of your code to help understand what you're trying to do when getting this error?

1 Answer

Tonnie Fanadez
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Tonnie Fanadez
UX Design Techdegree Graduate 22,796 Points
Tonnie Fanadez
.a{fill-rule:evenodd;}techdegree seal-36
Tonnie Fanadez
UX Design Techdegree Graduate 22,796 Points

Hi Sigurjon Johannesson

If you have JDK 11 and you're using Windows 10 you need to download javaFx 11 zip file extract it and save it in a desired location. Then add javaFx libraries to your Pomodoro Project using the project structure.

On the IDE click Run >>> select Edit Configurations >>> and paste the below magic line on >> VM Options >>click Apply.

--module-path ${PATH_TO_FX} --add-modules=javafx.controls,javafx.fxml,javafx.media

Mindaugas Sertvytis
Mindaugas Sertvytis
3,180 Points
Mindaugas Sertvytis
Mindaugas Sertvytis
3,180 Points

hi Tonnie Fanadez i have the same problem and your solution not helping still getting the same error any other suggestions? why most of java courses are out dated and all of the course project files not working because they are to old.... few of courses i had just to watch because no answer to topic and no solutions