Exception in Application start method - javafx

Question

I'm new to javafx and i was trying to make a gui from which when a button is clicked, it would go to another window. I tried reading many answers found on Stack Overflow. I even tried making the project again from the beginning...But i keep on getting the same error.
That is Exception is Application start method
java.lang.reflect.InvocationTargetException javafx
My Main
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class SkyTravelsFx extends Application {
#Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("Login.fxml"));
stage.initStyle(StageStyle.UNDECORATED);
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
LoginController.java
package skytravelsfx;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class LoginController implements Initializable {
#FXML
TextField username;
#FXML
TextField password;
#FXML
Button user;
#FXML
Button admin;
#FXML
Button login;
#FXML
public void btnClicked (ActionEvent actionEvent){
try{
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("User.fxml"));
Parent root=(Parent) fxmlLoader.load();
Stage stage = new Stage();
Scene scene = new Scene(root);
stage.setScene(scene);
stage.initStyle(StageStyle.UNDECORATED);
stage.show();
((Stage)(((Button)actionEvent.getSource()).getScene().getWindow())).hide();
}catch(Exception e){
e.printStackTrace();
}
}
#Override
public void initialize(URL location, ResourceBundle resources) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
Please note that i still haven't written any codes in UserController.java
I just made the ui for User.fxml
Login.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.image.*?>
<?import javafx.scene.shape.*?>
<?import javafx.scene.text.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="766.0" prefWidth="1366.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8" fx:controller="skytravelsfx.LoginController">
<children>
<ImageView fitHeight="866.0" fitWidth="1397.0" layoutX="10.0" layoutY="11.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#../../../SkyTravelFx/src/goodwp.com_25168.jpg" />
</image>
</ImageView>
<Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
<Label fx:id="label1" layoutX="565.0" layoutY="517.0" minHeight="16" minWidth="69" text="Select User">
<font>
<Font size="18.0" />
</font>
</Label>
<Rectangle arcHeight="5.0" arcWidth="5.0" fill="#095a77" height="140.0" stroke="BLACK" strokeType="INSIDE" strokeWidth="0.0" width="1386.0" />
<Label fx:id="label11" layoutX="56.0" layoutY="33.0" minHeight="16" minWidth="69" text="Sky Travels" textFill="WHITE">
<font>
<Font name="System Italic" size="72.0" />
</font>
</Label>
<Label fx:id="label12" layoutX="432.0" layoutY="91.0" minHeight="16" minWidth="69" text="Making your destination closer..." textFill="WHITE">
<font>
<Font name="System Italic" size="18.0" />
</font>
</Label>
<AnchorPane layoutX="83.0" layoutY="252.0" prefHeight="507.0" prefWidth="383.0">
<children>
<ImageView fitHeight="191.0" fitWidth="234.0" layoutX="96.0" layoutY="6.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="#../../../SkyTravelFx/src/icon-default-profile.png" />
</image>
</ImageView>
<Button fx:id="login" layoutX="153.0" layoutY="440.0" onAction="#handleButtonAction" style="-fx-background-color: #095a77;" text="Log In" textFill="WHITE">
<font>
<Font size="18.0" />
</font>
</Button>
<Label fx:id="label2" layoutX="152.0" layoutY="308.0" minHeight="16" minWidth="69" text="Password">
<font>
<Font size="18.0" />
</font>
</Label>
<Label fx:id="label2" layoutX="150.0" layoutY="214.0" minHeight="16" minWidth="69" text="Username">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="username" layoutX="115.0" layoutY="241.0" />
<TextField fx:id="password" layoutX="115.0" layoutY="335.0" />
</children>
</AnchorPane>
<Button fx:id="admin" layoutX="621.0" layoutY="592.0" mnemonicParsing="false" style="-fx-background-color: #095a77;" text="Log In as Admin" textFill="WHITE">
<font>
<Font size="18.0" />
</font>
</Button>
<Button fx:id="user" layoutX="621.0" layoutY="675.0" mnemonicParsing="false" onAction="#btnClicked" prefHeight="39.0" prefWidth="153.0" style="-fx-background-color: #095a77;" text="Log In as User" textFill="WHITE">
<font>
<Font size="18.0" />
</font>
</Button>
</children>
</AnchorPane>
Here is the run-time error i am getting.
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$155(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745) Caused by:
javafx.fxml.LoadException: Error resolving
onAction='#handleButtonAction', either the event handler is not in the
Namespace or there is an error in the script.
file:/C:/Users/Dell/Documents/NetBeansProjects/SkyTravelsFx/dist/run1245920268/SkyTravelsFx.jar!/skytravelsfx/Login.fxml:47
at
javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
at javafx.fxml.FXMLLoader.access$100(FXMLLoader.java:103) at
javafx.fxml.FXMLLoader$Element.processEventHandlerAttributes(FXMLLoader.java:610)
at
javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:770)
at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823) at
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532) at
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441) at
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214) at
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175) at
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148) at
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124) at
javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104) at
javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097) at
skytravelsfx.SkyTravelsFx.start(SkyTravelsFx.java:23) at
com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at
com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at
com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method) at
com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at
com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at
com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
... 1 more Exception running application skytravelsfx.SkyTravelsFx
Java Result: 1 Deleting directory
C:\Users\Dell\Documents\NetBeansProjects\SkyTravelsFx\dist\run1245920268
jfxsa-run: BUILD SUCCESSFUL (total time: 4 seconds)

Answer 1

The stack trace tells you the problem:
Error resolving onAction='#handleButtonAction', either the event handler is not in the Namespace or there is an error in the script.
You have
<Button fx:id="login" layoutX="153.0" layoutY="440.0" onAction="#handleButtonAction" ... >
but your controller has no method called handleButtonAction. You probably want
<Button fx:id="login" layoutX="153.0" layoutY="440.0" onAction="#btnClicked" ... >