java - JavaFX NullPointerException Location is required NetBeans -

i've tried else found on stack stackoverflow , dont why doesn't work. won't show code of application not working, because isn't working example project. here problem:

when create new javafx application sample code gives button prints hello world after clicked, works when run desktop application , when build , start in browser. works desktop , browser application

but when create new javafx fxml application same above stage defined fxml , css not byte code. 1 works windows application doesnt work browser application

java.lang.nullpointerexception: location required.     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.load(unknown source)     @ javafxapplication3.javafxapplication3.start(javafxapplication3.java:22)     @ com.sun.javafx.applet.fxapplet2$2.run(unknown source)     @ com.sun.javafx.application.platformimpl.lambda$null$170(unknown source)     @ com.sun.javafx.application.platformimpl$$lambda$46/15592694.run(unknown source)     @ java.security.accesscontroller.doprivileged(native method)     @ com.sun.javafx.application.platformimpl.lambda$runlater$171(unknown source)     @ com.sun.javafx.application.platformimpl$$lambda$45/19532686.run(unknown source)     @ com.sun.glass.ui.invokelaterdispatcher$future.run(unknown source)     @ com.sun.glass.ui.win.winapplication._runloop(native method)     @ com.sun.glass.ui.win.winapplication.lambda$null$145(unknown source)     @ com.sun.glass.ui.win.winapplication$$lambda$35/9825943.run(unknown source)     @ java.lang.thread.run(unknown source) exception in thread "javafx application thread" java.lang.runtimeexception: java.lang.nullpointerexception: location required.     @ com.sun.javafx.applet.fxapplet2$2.run(unknown source)     @ com.sun.javafx.application.platformimpl.lambda$null$170(unknown source)     @ com.sun.javafx.application.platformimpl$$lambda$46/15592694.run(unknown source)     @ java.security.accesscontroller.doprivileged(native method)     @ com.sun.javafx.application.platformimpl.lambda$runlater$171(unknown source)     @ com.sun.javafx.application.platformimpl$$lambda$45/19532686.run(unknown source)     @ com.sun.glass.ui.invokelaterdispatcher$future.run(unknown source)     @ com.sun.glass.ui.win.winapplication._runloop(native method)     @ com.sun.glass.ui.win.winapplication.lambda$null$145(unknown source)     @ com.sun.glass.ui.win.winapplication$$lambda$35/9825943.run(unknown source)     @ java.lang.thread.run(unknown source) caused by: java.lang.nullpointerexception: location required.     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.loadimpl(unknown source)     @ javafx.fxml.fxmlloader.load(unknown source)     @ javafxapplication3.javafxapplication3.start(javafxapplication3.java:22)     ... 11 more 

here code of working application:

public class javafxapplication4 extends application {      @override     public void start(stage primarystage) {         button btn = new button();         btn.settext("say 'hello world'");         btn.setonaction(new eventhandler<actionevent>() {              @override             public void handle(actionevent event) {                 system.out.println("hello world!");             }         });          stackpane root = new stackpane();         root.getchildren().add(btn);          scene scene = new scene(root, 300, 250);          primarystage.settitle("hello world!");         primarystage.setscene(scene);         primarystage.show();     }      /**      * @param args command line arguments      */     public static void main(string[] args) {         launch(args);     } 

and application doesnt work in browser , throws exception:

public class javafxapplication3 extends application {      @override     public void start(stage stage) throws exception {         parent root = fxmlloader.load(getclass().getresource("fxmldocument.fxml"));          scene scene = new scene(root);          stage.setscene(scene);         stage.show();     }      /**      * @param args command line arguments      */     public static void main(string[] args) {         launch(args);     }  } 

can me?

the problem in line:

parent root = fxmlloader.load(getclass().getresource("fxmldocument.fxml")); 

it pretty clear load method being called null argument. , happens because getresource("/sample/sample.fxml") cannot file resource.

the resource missing (or has wrong path) on runtime classpath.

source