"Location is required" error in JavaFX despite giving location | Together Java | Page 1

surreal elm Jul 31, 2023, 8:04 PM

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I keep getting this error while building a simple JavaFX project. Any ideas on how to fix this?

gentle valveBOT Jul 31, 2023, 8:04 PM

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<@&987246487241105418> please have a look, thanks.

gentle valveBOT Jul 31, 2023, 8:04 PM

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gentle valve <@&987246487241105418> please have a look, thanks.

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surreal elm Jul 31, 2023, 8:04 PM

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package com.example.mygame;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.stage.Stage;
import javafx.scene.*;


public class HelloApplication extends Application {


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

    }

    @Override
    public void start(Stage stage) throws Exception {


        Parent root = FXMLLoader.load(getClass().getClassLoader().getResource("/screen.fxml"));
        Scene scene = new Scene(root);
        stage.setWidth(500);
        stage.setHeight(350);
        stage.setResizable(false);
        stage.setTitle("My Anagram Game");


        stage.setScene(scene);
        stage.show();



    }
}

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blazing lava Jul 31, 2023, 8:04 PM

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surreal elm I keep getting this error while building a simple JavaFX project. Any ideas on h...

show file tree in build folder

surreal elm Jul 31, 2023, 8:05 PM

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this?

blazing lava Jul 31, 2023, 8:05 PM

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build folder

surreal elm Jul 31, 2023, 8:05 PM

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ahh mb

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same ss

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hold on

blazing lava Jul 31, 2023, 8:05 PM

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the build folder

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please show it

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show what's inside

surreal elm Jul 31, 2023, 8:06 PM

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i sent the wrong ss mb

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blazing lava Jul 31, 2023, 8:06 PM

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in classes

surreal elm Jul 31, 2023, 8:06 PM

#

blazing lava Jul 31, 2023, 8:06 PM

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show resources

surreal elm Jul 31, 2023, 8:07 PM

#

blazing lava Jul 31, 2023, 8:07 PM

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try to build again

surreal elm Jul 31, 2023, 8:07 PM

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is that the same thing as running the program?

blazing lava Jul 31, 2023, 8:07 PM

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no

surreal elm Jul 31, 2023, 8:07 PM

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alright how do I build then

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using gradle btw

blazing lava Jul 31, 2023, 8:08 PM

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gradlew clean build

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or something like that

surreal elm Jul 31, 2023, 8:08 PM

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where do i input that

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im new to build tools

blazing lava Jul 31, 2023, 8:09 PM

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command line

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or find the menu in intellij

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probably at the right

surreal elm Jul 31, 2023, 8:09 PM

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i imagine its this

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blazing lava Jul 31, 2023, 8:09 PM

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ah yes

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click on build

surreal elm Jul 31, 2023, 8:10 PM

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nothings happening

blazing lava Jul 31, 2023, 8:10 PM

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nothing in the console ?

surreal elm Jul 31, 2023, 8:10 PM

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let me see

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oh i got it

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build successful

blazing lava Jul 31, 2023, 8:11 PM

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now show what's in build again

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in classes and resources

surreal elm Jul 31, 2023, 8:12 PM

#

blazing lava Jul 31, 2023, 8:12 PM

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delete build

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and build

surreal elm Jul 31, 2023, 8:13 PM

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delete the whole folder?

blazing lava Jul 31, 2023, 8:13 PM

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yes

surreal elm Jul 31, 2023, 8:13 PM

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blazing lava Jul 31, 2023, 8:14 PM

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did you delete it ?

surreal elm Jul 31, 2023, 8:14 PM

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yes

blazing lava Jul 31, 2023, 8:14 PM

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because build doesn't really match your file tree

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try to actually run gradlew clean build

surreal elm Jul 31, 2023, 8:15 PM

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where do I go to input that

blazing lava Jul 31, 2023, 8:15 PM

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console

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or the menu at the right

surreal elm Jul 31, 2023, 8:16 PM

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this?

blazing lava Jul 31, 2023, 8:16 PM

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yes

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run gradle clean

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then run gradle build

surreal elm Jul 31, 2023, 8:18 PM

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blazing lava Jul 31, 2023, 8:18 PM

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surreal elm

can you show the file tree above ?

surreal elm Jul 31, 2023, 8:19 PM

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.idea?

gentle valveBOT Jul 31, 2023, 8:19 PM

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surreal elm .idea?

Looks like you attempted to use a command? Please note that we only use slash-commands on this server 🙂

Try starting your message with a forward-slash / and Discord should open a popup showing you all available commands.
A command might then look like /foo 👍

blazing lava Jul 31, 2023, 8:19 PM

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surreal elm

this

surreal elm Jul 31, 2023, 8:19 PM

#

blazing lava Jul 31, 2023, 8:20 PM

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weird 🤔

surreal elm Jul 31, 2023, 8:20 PM

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indeed

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is it supposed to show screen.fxml?

blazing lava Jul 31, 2023, 8:20 PM

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yes

surreal elm Jul 31, 2023, 8:21 PM

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hm

blazing lava Jul 31, 2023, 8:21 PM

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and rhcp.png isn't supposed to be here

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since you didn't put it in com

surreal elm Jul 31, 2023, 8:21 PM

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it is in com

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oh

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nvm

blazing lava Jul 31, 2023, 8:21 PM

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can you try to put screen.fxml in com.example.mygame

surreal elm Jul 31, 2023, 8:22 PM

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done

blazing lava Jul 31, 2023, 8:22 PM

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then clean and build again

surreal elm Jul 31, 2023, 8:22 PM

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not there

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gradle is up to date as well

blazing lava Jul 31, 2023, 8:25 PM

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show build.gradle

surreal elm Jul 31, 2023, 8:26 PM

#

blazing lava Jul 31, 2023, 8:26 PM

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build.gradle

surreal elm Jul 31, 2023, 8:27 PM

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oh myb

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plugins {
    id 'java'
    id 'application'
    id 'org.javamodularity.moduleplugin' version '1.8.12'
    id 'org.openjfx.javafxplugin' version '0.0.13'
    id 'org.beryx.jlink' version '2.25.0'
}

group 'com.example'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

ext {
    junitVersion = '5.9.2'
}

sourceCompatibility = '20'
targetCompatibility = '20'

tasks.withType(JavaCompile) {
    options.encoding = 'UTF-8'
}

application {
    mainModule = 'com.example.mygame'
    mainClass = 'com.example.mygame.HelloApplication'
}

javafx {
    version = '20'
    modules = ['javafx.controls', 'javafx.fxml']
}

dependencies {
    implementation('com.dlsc.formsfx:formsfx-core:11.6.0') {
        exclude(group: 'org.openjfx')
    }

    testImplementation("org.junit.jupiter:junit-jupiter-api:${junitVersion}")
    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:${junitVersion}")
}

test {
    useJUnitPlatform()
}

jlink {
    imageZip = project.file("${buildDir}/distributions/app-${javafx.platform.classifier}.zip")
    options = ['--strip-debug', '--compress', '2', '--no-header-files', '--no-man-pages']
    launcher {
        name = 'app'
    }
}

jlinkZip {
    group = 'distribution'
}

blazing lava Jul 31, 2023, 8:28 PM

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I don't know why it doesn't copy screen.fxml sorry

surreal elm Jul 31, 2023, 8:28 PM

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i appreciate the help regardless

blazing lava Jul 31, 2023, 8:28 PM

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wait for someone else how knows better about gradle then me I guess

gusty thicket Jul 31, 2023, 8:29 PM

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is it normal that he has 2 gradle versions ?

surreal elm Jul 31, 2023, 8:31 PM

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that is weird

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running gradle -v gives me 8.2.1

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i dont remember installing 8.0.2

hard marsh Jul 31, 2023, 8:37 PM

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@surreal elm could it be that the screen.fxml is not inside the resources folder?

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surreal elm Jul 31, 2023, 8:37 PM

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lets see

hard marsh Jul 31, 2023, 8:37 PM

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it looks like its outside

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liek rhcp is inside

blazing lava Jul 31, 2023, 8:37 PM

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surreal elm

@hard marsh

hard marsh Jul 31, 2023, 8:37 PM

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yeah

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it still looks outside

blazing lava Jul 31, 2023, 8:37 PM

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hard marsh it looks like its outside

ah it's outside ?

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👀

surreal elm Jul 31, 2023, 8:37 PM

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ill fix it

hard marsh Jul 31, 2023, 8:37 PM

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based on rhcp.png

blazing lava Jul 31, 2023, 8:37 PM

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but

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I asked him to move it inside mygame

surreal elm Jul 31, 2023, 8:38 PM

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had the exact same issue with rhcp.png not showing

blazing lava Jul 31, 2023, 8:38 PM

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and he said it still didn't work

surreal elm Jul 31, 2023, 8:38 PM

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i didnt run the program with it inside

gusty thicket Jul 31, 2023, 8:38 PM

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resources is marked as resource ? just to be sure

surreal elm Jul 31, 2023, 8:38 PM

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gusty thicket resources is marked as resource ? just to be sure

what does this mean

hard marsh Jul 31, 2023, 8:39 PM

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gusty thicket resources is marked as resource ? just to be sure

I think so based on the fact that rhcp.png is inside the build folder

surreal elm Jul 31, 2023, 8:40 PM

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ill give it a shot

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@hard marsh is exactly right

gusty thicket Jul 31, 2023, 8:40 PM

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rhcp is in com though, even on the older shots

hard marsh Jul 31, 2023, 8:41 PM

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its not?

surreal elm Jul 31, 2023, 8:41 PM

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rhcp was inside recources

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screen.fxml was not

gusty thicket Jul 31, 2023, 8:41 PM

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same level as com, sorry

hard marsh Jul 31, 2023, 8:41 PM

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yeah

surreal elm Jul 31, 2023, 8:42 PM

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package com.example.mygame;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.stage.Stage;
import javafx.scene.*;


public class HelloApplication extends Application {


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

    }

    @Override
    public void start(Stage stage) throws Exception {


        Parent root = FXMLLoader.load(getClass().getClassLoader().getResource("/screen.fxml"));
        Scene scene = new Scene(root);
        stage.setWidth(500);
        stage.setHeight(350);
        stage.setResizable(false);
        stage.setTitle("My Anagram Game");


        stage.setScene(scene);
        stage.show();



    }
}

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why isnt it showing when i run the program??

gusty thicket Jul 31, 2023, 8:42 PM

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just for the shizzle, can u go in command and see that fxml file is not placed anywhere else inside your build ?

hard marsh Jul 31, 2023, 8:42 PM

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surreal elm why isnt it showing when i run the program??

the image?

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or the whole application?

surreal elm Jul 31, 2023, 8:42 PM

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the whole app, nothing appears

blazing lava Jul 31, 2023, 8:43 PM

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surreal elm the whole app, nothing appears

any error ?

surreal elm Jul 31, 2023, 8:43 PM

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no errors, it says build successful

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but nothing appears

blazing lava Jul 31, 2023, 8:43 PM

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did you click the run button ?

gusty thicket Jul 31, 2023, 8:43 PM

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exit 0 status on console ?

surreal elm Jul 31, 2023, 8:43 PM

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yes

blazing lava Jul 31, 2023, 8:43 PM

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did you just build

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or run ?

surreal elm Jul 31, 2023, 8:44 PM

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built and ran

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nvm i found the issue

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but i still get "location is required"

hard marsh Jul 31, 2023, 8:44 PM

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show the full error

surreal elm Jul 31, 2023, 8:45 PM

#

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looks like its not showing again

hard marsh Jul 31, 2023, 8:45 PM

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thats not the full error

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its just your file explorer

surreal elm Jul 31, 2023, 8:45 PM

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yeah ik im getting it

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#

hard marsh Jul 31, 2023, 8:46 PM

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surreal elm

click on the first entry of this tree and send us the full error log

surreal elm Jul 31, 2023, 8:46 PM

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> Task :HelloApplication.main()
Jul 31, 2023 3:45:22 PM com.sun.glass.ui.mac.MacApplication lambda$waitForReactivation$6
WARNING: Timeout while waiting for app reactivation
Timeout while waiting for app reactivation

Exception in Application start method
java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
    at java.base/java.lang.reflect.Method.invoke(Method.java:578)
    at javafx.graphics@20/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
    at javafx.graphics@20/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
    at java.base/java.lang.reflect.Method.invoke(Method.java:578)
    at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1081)
Caused by: java.lang.RuntimeException: Exception in Application start method
Caused by: java.lang.RuntimeException: Exception in Application start method

    at javafx.graphics@20/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:893)
    at javafx.graphics@20/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
    at java.base/java.lang.Thread.run(Thread.java:1623)
Caused by: java.lang.NullPointerException: Location is required.
    at javafx.fxml@20/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3369)
    at javafx.fxml@20/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3332)
    at javafx.fxml@20/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3300)
Caused by: java.lang.NullPointerException: Location is required.

    at javafx.fxml@20/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3272)
    at javafx.fxml@20/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3248)
    at javafx.fxml@20/javafx.fxml.FXMLLoader.load(FXMLLoader.java:3241)
    at [email protected]/com.example.mygame.HelloApplication.start(HelloApplication.java:23)
    at javafx.graphics@20/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:839)
    at javafx.graphics@20/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:483)
    at javafx.graphics@20/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:456)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
    at javafx.graphics@20/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:455)
    at javafx.graphics@20/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
Exception running application com.example.mygame.HelloApplication

> Task :HelloApplication.main() FAILED

Execution failed for task ':HelloApplication.main()'.
> Process 'command '/Library/Java/JavaVirtualMachines/jdk-20.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.
You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.
For more on this, please refer to https://docs.gradle.org/8.2.1/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.
BUILD FAILED in 5s
4 actionable tasks: 1 executed, 3 up-to-date

gentle valveBOT Jul 31, 2023, 8:46 PM

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surreal elm ``` > Task :HelloApplication.main() Jul 31, 2023 3:45:22 PM com.sun.glass.ui.mac...

Detected code, here are some useful tools:

surreal elm Jul 31, 2023, 8:46 PM

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this?

hard marsh Jul 31, 2023, 8:46 PM

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yeah

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at [email protected]/com.example.mygame.HelloApplication.start(HelloApplication.java:23)

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whats that line?

surreal elm Jul 31, 2023, 8:48 PM

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are you asking me?

hard marsh Jul 31, 2023, 8:48 PM

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yeah

surreal elm Jul 31, 2023, 8:48 PM

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i have no idea what that means

hard marsh Jul 31, 2023, 8:48 PM

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HelloApplication.java:23

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what is line 23 in that file

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I mean

surreal elm Jul 31, 2023, 8:48 PM

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ahhh

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Parent root = FXMLLoader.load(getClass().getClassLoader().getResource("/screen.fxml"));

hard marsh Jul 31, 2023, 8:48 PM

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why are you using getClass().getClassLoader().getResource()

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instead of getClass().getResource()

surreal elm Jul 31, 2023, 8:49 PM

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saw a thread on stack that said that fixed it for someone

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i get the same error either way

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wait

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different error

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hard marsh Jul 31, 2023, 8:50 PM

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again show the full error

surreal elm Jul 31, 2023, 8:50 PM

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📎 message.txt

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same thing it says for line 23 it seems

hard marsh Jul 31, 2023, 8:51 PM

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Caused by: java.lang.ClassNotFoundException: Screen
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    at javafx.fxml@20/javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:933)
    ... 19 more

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pls show us your screen.fxml

surreal elm Jul 31, 2023, 8:51 PM

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

<?import javafx.scene.layout.*?>
<?import javafx.scene.shape.*?>


<AnchorPane prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/17.0.2-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Screen">
   <children>
      <Arc fill="DODGERBLUE" layoutX="260.0" layoutY="164.0" length="270.0" radiusX="100.0" radiusY="100.0" startAngle="45.0" stroke="BLACK" strokeType="INSIDE" type="ROUND" />
   </children>
</AnchorPane>

gentle valveBOT Jul 31, 2023, 8:51 PM

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surreal elm ```java <?xml version="1.0" encoding="UTF-8"?> <?import javafx.scene.layout.*?>...

Detected code, here are some useful tools:

hard marsh Jul 31, 2023, 8:51 PM

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its searching for a fx:controller called Screen

surreal elm Jul 31, 2023, 8:52 PM

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hm

hard marsh Jul 31, 2023, 8:52 PM

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but you have no controller named Screen

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also not in that location

gusty thicket Jul 31, 2023, 8:52 PM

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shouldnt that fxml be inside the actual project ?

hard marsh Jul 31, 2023, 8:52 PM

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no

hard marsh Jul 31, 2023, 8:52 PM

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gusty thicket shouldnt that fxml be inside the actual project ?

what do you even mean? being in resources is the way to go

surreal elm Jul 31, 2023, 8:53 PM

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i did rename the file from "Screen" to "screen"

hard marsh Jul 31, 2023, 8:53 PM

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not the file itself

surreal elm Jul 31, 2023, 8:53 PM

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ik, just thought it was pertinent somehow

hard marsh Jul 31, 2023, 8:53 PM

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you know what a controller is in javafx?

surreal elm Jul 31, 2023, 8:53 PM

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no

gusty thicket Jul 31, 2023, 8:53 PM

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have a look at his resources folder icon

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yours and mine are

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https://i.imgur.com/2KfVqtN.png

Imgur

surreal elm Jul 31, 2023, 8:53 PM

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hard marsh Jul 31, 2023, 8:54 PM

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gusty thicket have a look at his resources folder icon

now?

hard marsh Jul 31, 2023, 8:54 PM

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surreal elm no

you basically make a Java class which handles stuff from your fxml

gusty thicket Jul 31, 2023, 8:54 PM

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ok shows marked then

hard marsh Jul 31, 2023, 8:54 PM

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your .fxml file is just a model for the application

surreal elm Jul 31, 2023, 8:54 PM

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ahh okay

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so i just need to make a class?

hard marsh Jul 31, 2023, 8:54 PM

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yeah

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and then link it to the fxml file

surreal elm Jul 31, 2023, 8:55 PM

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how to link it?

hard marsh Jul 31, 2023, 8:55 PM

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surreal elm ```java <?xml version="1.0" encoding="UTF-8"?> <?import javafx.scene.layout.*?>...

using the fx:controller in the fxml file

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in that version its linked to Screen but that class doesnt exist and was unintended

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what did you name your controller and where did you put it?

surreal elm Jul 31, 2023, 8:56 PM

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everything is the deault thing that is created when you make a javafx project in intellij, i havent made a controller myself i dont believe

hard marsh Jul 31, 2023, 8:57 PM

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then make one or remove the fx:controller argument in the fxml file for now

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and try running it

surreal elm Jul 31, 2023, 8:57 PM

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yay

hard marsh Jul 31, 2023, 8:57 PM

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cat_thumbs_up

surreal elm Jul 31, 2023, 8:58 PM

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thank you all, yall are lifesavers for someone just getting into java/javafx

#"Location is required" error in JavaFX despite giving location