JavaFX Maven InvocationTargetException

Question

Witam,

zacząłem pisać większy projekt. Po napisaniu klasy odpowiedzialnej za logowanie i rejestrację postanowiłem sprawdzić jak to działa w połączeniu z JavaFX. Niestety od wczoraj próbuję rozwiązać problem związany z odpalaniem okienka logowania. Proszę o pomoc. Przeszukałem sporo tematów na różnych forach, ale nic nie pomogło. Jest to mój pierwszy projekt z wykorzystaniem Mavena. Poniżej załączam błędy jakie wyskakują oraz kod.

 

Exception in Application start method
java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:473)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:372)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:941)
Caused by: java.lang.RuntimeException: Exception in Application start method
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:973)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:198)
	at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.NullPointerException: Location is required.
	at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3246)
	at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3210)
	at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3179)
	at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3152)
	at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3129)
	at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:3122)
	at main.Login.start(Login.java:16)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:919)
	at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$11(PlatformImpl.java:449)
	at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$9(PlatformImpl.java:418)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:417)
	at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
	at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:175)
	... 1 more
Exception running application main.Login

 

Klasa główna - Login

package main;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Login extends Application {
    public Login() {
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        System.out.println("too");
        Parent root = FXMLLoader.load(this.getClass().getResource("../fxmlFile/login.fxml"));
        primaryStage.setTitle("Quiz");
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

Controller

 

package controllers;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;

import java.net.URL;
import java.util.ResourceBundle;

public class LoginController implements Initializable {

    @FXML
    public AnchorPane anchorPane;
    @FXML
    public TextField txtfUsername;
    @FXML
    public PasswordField pfPassword;
    @FXML
    public Label lbInfo;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        while(true);
    }

    @FXML
    public void clickPassword(ActionEvent actionEvent) {
    }
    @FXML
    public void clickZaloguj(ActionEvent actionEvent) {
    }
}

 

login.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.PasswordField?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.text.Font?>

<AnchorPane fx:id="anchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" style="-fx-background-color: #d6d6d6;" xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="controllers.LoginController">
    <children>
        <Pane layoutX="100.0" layoutY="50.0" prefHeight="311.0" prefWidth="400.0" style="-fx-background-color: #d6d6d6;">
            <children>
                <TextField fx:id="txtfUsername" layoutX="123.0" layoutY="76.0" promptText="Nazwa użytkownika">
               <font>
                  <Font name="Microsoft New Tai Lue" size="12.0" />
               </font></TextField>
                <PasswordField fx:id="pfPassword" layoutX="124.0" layoutY="131.0" onAction="#clickPassword" promptText="Hasło">
               <font>
                  <Font name="Microsoft Tai Le" size="12.0" />
               </font></PasswordField>
                <Button layoutX="168.0" layoutY="187.0" mnemonicParsing="false" onAction="#clickZaloguj" text="Zaloguj" textFill="WHITE">
               <font>
                  <Font name="System Bold" size="13.0" />
               </font></Button>
            <Label layoutX="147.0" layoutY="-14.0" text="Zaloguj się" textFill="WHITE">
               <font>
                  <Font name="Impact" size="24.0" />
               </font>
            </Label>
            <Label fx:id="lbInfo" alignment="CENTER" contentDisplay="CENTER" layoutX="83.0" layoutY="29.0" prefHeight="20.0" prefWidth="234.0" textFill="RED">
               <font>
                  <Font size="14.0" />
               </font>
            </Label>
            </children>
        </Pane>
    </children>
</AnchorPane>

 

pom.xml

 

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>Szklarnia</groupId>
    <artifactId>Szklarnia</artifactId>
    <version>1.0-SNAPSHOT</version>

    <name>Quiz</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>sqljdbc7</artifactId>
            <version>7.0.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.openjfx/javafx-controls -->
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>11</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.openjfx/javafx-fxml -->
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-fxml</artifactId>
            <version>11</version>
        </dependency>


    </dependencies>
    <build>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.0.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.7.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.20.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-jar-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <mainClass>main.java.main.Login</mainClass>
                        </manifest>
                    </archive>
                </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

Answer 1

Czepia Ci się o:

 Parent root = FXMLLoader.load(this.getClass().getResource("../fxmlFile/login.fxml"));

Caused by: java.lang.NullPointerException: Location is required.
....
.....
    at main.Login.start(Login.java:16)
.....
.....
....

 

Spróbuj zapisać to tak:

Parent root = FXMLLoader.load(this.getClass().getResource("/fxmlFile/login.fxml"));

Jeśli nadal nie będzie działać to umieść plik fxmlFile/login.fxml w katalogu resources.

Ale nawet jak zadziała bez przenoszenia do resources to zrób to, ponieważ dzięki temu oddziela się kod Javy od fxml.

Comments

Probowalem to zrobić wcześniej, ale nie działało. Spróbuję jak będę w domu.

A jak powinien się nazywac plik w którym sa te fxmle? To jest istotne?

---

Z technicznego punktu widzenia, nie.

Ale jesteś pewny, że dokładnie tak robiłeś bo to się też czepia jak nie dasz znaku "/" w ścieżce, na pierwszym miejscu.

---

Działa :) Wcześniej jednak brakło mi chyba tego /

Dziękuję bardzo za pomoc! :)