Posts by Vin vin

Every Monday, there will be a event in the discord server (:

I made a JavaFX Discord Server for people who like to talk about JavaFX stuff, or need help with certain projects, I really like to work with java, especially with people who are working with JavaFX (:

Here is the discord link: https://discord.gg/yZ3Y3Fd or https://discord.gg/AzFaNU

I don't have the code, but you can check out the download link of that website, there is some source code that can guide you.

solved it :D
This amazing website got it for me
http://lagers.org.uk/javafx/usemeshview.html

It took me 1 week to figure out how this works.

If you are wondering, what "FxTimer" is, it is from ReactFX library, with this I can make a Timeline, that loops 60 times per second.
this part of code is not really important. It was just to test if the cube can move. Like if the 6 sides of the cube can even move.

this is the code, what I have right now:

This is the first main class.

package com.vinayak.trianglemesh.experiment;

import java.time.Duration;

import org.reactfx.util.FxTimer;

import javafx.animation.AnimationTimer;
import javafx.application.Application;
import javafx.geometry.Point3D;
import javafx.geometry.Rectangle2D;
import javafx.scene.Camera;
import javafx.scene.Group;
import javafx.scene.PerspectiveCamera;
import javafx.scene.Scene;
import javafx.stage.Screen;
import javafx.stage.Stage;

public class CoreCube extends Application {

    public static final String PROGRAM_TITLE = "Mooie Kubus Experiment";

    public static Rectangle2D primaryScreenBounds = Screen.getPrimary().getBounds();
    public static double monitorWidth = (primaryScreenBounds.getWidth());
    public static double monitorHeight = (primaryScreenBounds.getHeight());
    public static double sceneWidth = (monitorWidth / 1.5);
    public static double sceneHeight = (monitorHeight / 1.5);
    public static boolean isFullScreen = false;
    public static boolean isConsoleSpamOn = false;

    public static Group group;
    public static Scene scene;
    public static Stage window;

    public static int fps = 60;
    public static int frame = 0;

    public static Camera camera;

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        group = new Group();
        scene = new Scene(group, sceneWidth, sceneHeight, true);
        window = primaryStage;
        window.setScene(scene);
        window.setTitle(PROGRAM_TITLE);
        window.show();

        Cube.makeCube();

        cameraStuff();
    }

    public static void cameraStuff() {
        camera = new PerspectiveCamera();
        scene.setCamera(camera);

        FxTimer.runPeriodically(Duration.ofMillis((long) (1000 / 60)), () -> {
            for (int i = 0; i < Cube.rect.length; i++) {
                Cube.rect[i].setTranslateX(frame);
                Cube.rect[i].setTranslateY(frame);
                Cube.rect[i].setTranslateZ(frame);
            }
            frame++;
        });
    }
}

And this is the second class:

package com.vinayak.trianglemesh.experiment;

import javafx.geometry.Point3D;
import javafx.scene.paint.Color;
import javafx.scene.shape.Box;
import javafx.scene.shape.Rectangle;

public class Cube extends CoreCube {

    public static Rectangle rect[];

    public static void makeCube() {

        rect = new Rectangle[6];

        rect[0] = new Rectangle(0, 0, 200, 200);
        rect[0].setFill(Color.CORAL);
        rect[0].setTranslateZ(-100);
        rect[0].setRotationAxis(new Point3D(0.0, 0.0, 0.0));
        rect[0].setRotate(0); …

I made a mistake in the discussion.
I want each texure on each side of the cube, not 6 textures on each side of the cube.
I am really sorry.

How do I make a cube in javafx that have 6 different textures on each side of the cube?
The only way I know how to solve this, is by making 6 imageviews and give them each a specific coordinates that make them look like a cube.
Is there a other way to do this?
Like, I like to give the cube later on lighting, and some rotations. It will be more complex if I use this method.

Btw, I heard about Triangle Mesh, but I don't know how TextureCoords works.

handy links:
https://docs.oracle.com/javase/8/javafx/api/javafx/scene/shape/TriangleMesh.html
https://docs.oracle.com/javase/8/javafx/api/javafx/scene/shape/Box.html

this might help me:
https://stackoverflow.com/questions/18580712/opentk-opengl-texture-not-drawing

btw, I am going to use the newest version of opengl.
I am not going to use the "using OpenTK.Graphics.OpenGL;", but the "using OpenTK.Graphics.OpenGL4;".

an extra tutorial that I read about it is:
http://neokabuto.blogspot.com/p/tutorials.html
https://github.com/neokabuto/OpenTKTutorialContent

I worked about 2 weeks with OpenTK and I like to know how to texture triangles.
I like to give my program, the flexibility to make shapes like triangles, cubes, spheres and to give them different textures (or shaders).
I like to give my window a icon, but it says that I have this error:

"Exception Unhandled, System.ArgumentException: 'Argument 'picture' must be a picture that can be used as a icon.'".

This exception was originally thrown at this call stack:
    System.Drawing.Icon.Initialize(int, int)
    System.Drawing.Icon.Icon(string, int, int)
    System.Drawing.Icon.Icon(string)
    obamaExperimentingV1_14.ObamaBattlezCSharp.Main(string[]) in Program.cs

I am really thankfull if someone helps me or ask some questions at me or critisize my code, I know this is some multiple questions at one post.
But again, I am really thankfull for this.

Here are some tutorials (,but I can't really understand it fully):
https://github.com/opentk/LearnOpenTK
https://github.com/giawa/opengl4tutorials
https://www.youtube.com/playlist?list=PLWzp0Bbyy_3ggUK3XZjBmwnSjhbhJH3kp
https://github.com/eowind/dreamstatecoding
http://dreamstatecoding.blogspot.com/2017/01/opengl-4-with-opentk-in-c-part-1.html
https://opentk.net/learn/index.html
http://www.siltutorials.com/opentkbasicsindex

here are the things that I don't know what it is, here is a list what I don't know about:

• buffer;
• vector;
• matrix;
• buffertarget;
• bindbuffer;
• bufferdata;
• indices;
• clearbuffermask;
• colorbufferbit.

Here is a full code, there are just 2 classes in my project.

Program.cs

using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Input;
using System;
using System.Drawing;

namespace obamaExperimentingV1_14
{
    public class ObamaBattlezCSharp : GameWindow
    { 
        private static void Main(string[] args)
        {
            using (var window = new Window(1280, 720, GraphicsMode.Default, "Obama Battlez CSharp Version", GameWindowFlags.Default, DisplayDevice.Default)) {
                window.Icon = new Icon("Resources/bruhstar (1).bmp");
                window.Run(60.0f);
            }
        }
    }
}

Window.cs

btw, if someones knows how to change the icon of the window, then tell me how, I am really curious how to set the icon for the window.

Here is my full code, I have 2 classes in my namespace

Program.cs

using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Input;
using System;
using System.Drawing;

namespace obamaExperimentingV1_14
{
    public class ObamaBattlezCSharp : GameWindow
    { 
        private static void Main(string[] args)
        {
            using (var window = new Window(1280, 720, GraphicsMode.Default, "Obama Battlez CSharp Version", GameWindowFlags.Default, DisplayDevice.Default)) {
                //window.Icon = new Icon("Resources/bruhstar (1).bmp");
                window.Run(60.0f);
            }
        }
    }
}

Window.cs

using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Input;
using System;
using System.Drawing;

namespace obamaExperimentingV1_14
{
    class Window : GameWindow
    {

        public Window(int width, int height, GraphicsMode graphicsMode, string title, GameWindowFlags gameWindowFlags, DisplayDevice displayDevice)
            : base(width, height, GraphicsMode.Default, title, GameWindowFlags.Default, displayDevice)
        {

        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            GL.ClearColor(0.5f, 0.6f, 0.7f, 1.0f);
        }

        protected override void OnUpdateFrame(FrameEventArgs e)
        {
            base.OnUpdateFrame(e);

            var input = Keyboard.GetState();

            if (input.IsKeyDown(Key.Escape)) {
                Exit();
            }

            base.OnUpdateFrame(e);

        }

        protected override void OnRenderFrame(FrameEventArgs e)
        {
            base.OnRenderFrame(e);
            GL.Clear(ClearBufferMask.ColorBufferBit);

            GL.Color4(0.4, 0.6, 0.1, 1.0);
            GL.Begin(PrimitiveType.Triangles);
            GL.Vertex2(0, 0);
            GL.Vertex2(1, 0);
            GL.Vertex2(0, 1);
            GL.End();

            GL.Color4(0.4, 0.2, 0.1, 1.0);
            GL.Begin(PrimitiveType.Triangles);
            GL.Vertex2(0, 0);
            GL.Vertex2(-1, 0);
            GL.Vertex2(0, -1);
            GL.End();

            SwapBuffers();
        }

        protected override void OnResize(EventArgs e)
        {
            base.OnResize(e);
            GL.Viewport(0, 0, Width, Height);
        }

        protected override void OnUnload(EventArgs e)
        {
            base.OnUnload(e);
        }
    }
}

I am now learning OpenTK. I have some trouble learning how buffers, vectors and how to make more than 2 3d shapes.
and if I try to set the texture or shaders, it will change all the shapes to the same textures and shaders.

I have read a lot of tutorials.
here are some list of tutorials that I have seen and read about it:

https://github.com/opentk/LearnOpenTK
https://github.com/giawa/opengl4tutorials
https://www.youtube.com/playlist?list=PLWzp0Bbyy_3ggUK3XZjBmwnSjhbhJH3kp
https://github.com/eowind/dreamstatecoding
http://dreamstatecoding.blogspot.com/2017/01/opengl-4-with-opentk-in-c-part-1.html
https://opentk.net/learn/index.html
http://www.siltutorials.com/opentkbasicsindex

how can I give these 2 triangles different shaders or/and textures.

```c#
            GL.Color4(0.4, 0.6, 0.1, 1.0);
            GL.Begin(PrimitiveType.Triangles);
            GL.Vertex2(0, 0);
            GL.Vertex2(1, 0);
            GL.Vertex2(0, 1);
            GL.End();

            GL.Color4(0.4, 0.2, 0.1, 1.0);
            GL.Begin(PrimitiveType.Triangles);
            GL.Vertex2(0, 0);
            GL.Vertex2(-1, 0);
            GL.Vertex2(0, -1);
            GL.End();
```

How can I minify my code in here, I am giving each 23 total imageview a eventhandler.
code works, but I like to make the code shorter. I tried to use for loops to shorten the code.
here is a example what I tried to do:

    for (int i = 0 ; i < imgArrayList.size() ; i++) {
        imgArrayList.get(i).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                selectedTile = i;
            }
        });
    }

but it can't because, the "i" inside the handle method is final. I can't pass the "i" inside the handle method.

my goal is, that a specific imageview, that has for example ".get(3)", that needs to print out 3.
so if the imageview have a .get(i), it needs to print out the exact same number of i.
btw, the imageviews are stored in a arraylist, if you are curious where the ".get" comes from.

    protected static void addImageViewMouseEvents() {
        UI_SelectionMenu.imgArrayList.get(0).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                UI_SelectionMenu.selectedTile = 0;
                System.out.println(UI_SelectionMenu.selectedTile);
            }
        });
        UI_SelectionMenu.imgArrayList.get(1).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                UI_SelectionMenu.selectedTile = 1;
                System.out.println(UI_SelectionMenu.selectedTile);
            }
        });
        UI_SelectionMenu.imgArrayList.get(2).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                UI_SelectionMenu.selectedTile = 2;
                System.out.println(UI_SelectionMenu.selectedTile);
            }
        });
        UI_SelectionMenu.imgArrayList.get(3).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                UI_SelectionMenu.selectedTile = 3;
                System.out.println(UI_SelectionMenu.selectedTile);
            }
        });
        UI_SelectionMenu.imgArrayList.get(4).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                UI_SelectionMenu.selectedTile = 4;
                System.out.println(UI_SelectionMenu.selectedTile);
            }
        });
        UI_SelectionMenu.imgArrayList.get(5).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                UI_SelectionMenu.selectedTile = 5;
                System.out.println(UI_SelectionMenu.selectedTile);
            }
        });
        UI_SelectionMenu.imgArrayList.get(6).setOnMouseClicked(new EventHandler<MouseEvent>() {

            @Override
            public void …

example of how to use Math.PI:
/
System.out.println(5 Math.PI);
*/

you don't even need to import the java.lang.Math.* thing.

nvm, my keys already are smooth enough XD
I am dumb, this is a dumb post, I facepalmed myself.

yes, that is the problem

//here is my code

import javafx.animation.AnimationTimer;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class SmoothKeyEvents extends Application {

    public final static String TITLE = "simple key-input program";
    public final static short WIDTH = 1280;
    public final static short HEIGHT = 720;

    private Stage window;
    private Scene mainS;
    private Group groupS;
    private Rectangle rect;

    private int x = 50;
    private int y = 50;
    private int velX = 0;
    private int velY = 0;

    @Override
    public void start(Stage primaryStage) {
        groupS = new Group();
        mainS = new Scene(groupS, WIDTH, HEIGHT, Color.DARKBLUE);
        window = primaryStage;
        window.setScene(mainS);
        window.setTitle(TITLE);
        window.show();
        window.requestFocus();

        rect = new Rectangle();
        rect.setFill(Color.MEDIUMSPRINGGREEN);
        rect.setX(x);
        rect.setY(y);
        rect.setWidth(150);
        rect.setHeight(150);
        groupS.getChildren().add(rect);

        mainS.setOnKeyPressed(new EventHandler<KeyEvent>(){

            @Override
            public void handle(KeyEvent ke) {
                if(ke.getCode() == KeyCode.A) {
                    setVelX(-9);
                }
                if(ke.getCode() == KeyCode.S) {
                    setVelY(9);
                }
                if(ke.getCode() == KeyCode.D) {
                    setVelX(9);
                }
                if(ke.getCode() == KeyCode.W) {
                    setVelY(-9);
                }
            }
        });

        mainS.setOnKeyReleased(new EventHandler<KeyEvent>(){

            @Override
            public void handle(KeyEvent ke) {
                if(ke.getCode() == KeyCode.A) {
                    setVelX(0);             
                }
                if(ke.getCode() == KeyCode.S) {
                    setVelY(0);
                }
                if(ke.getCode() == KeyCode.D) {
                    setVelX(0);
                }
                if(ke.getCode() == KeyCode.W) {
                    setVelY(0);
                }
            }
        });

        final AnimationTimer at = new AnimationTimer() {

            @Override
            public void handle(long arg0) {
                x += velX;
                rect.setX(x);
                y += velY;
                rect.setY(y);
            }
        };
        at.start();
    }

    public void setVelX(int velX) {
        this.velX = velX;
    }

    public void setVelY(int velY) {
        this.velY = velY;
    }

    public void stop() {
        System.out.println("program exited");
    }

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

I am making a ping pong game using JavaFX, but before I am going to make that, I like to test the KeyEvents.
I made a simple ping pong game about 2 years ago, but I like to improve my game.
And was pretty bad controlls back when I made the ping pong game, because of the not smooth controls.

so here is the problem:
whenever I holdpress A and switch quickly to holdpress D or D to A, same with (W to S and S to W).
it just takes a little break and then move, is there something I can change, improve?
I don't know why it does this.

how can I make it that another client can join in?
like there is 2 clients and 1 server.
do I just copy the clients code?

Nailed it :D

package com.VINSTORM.bleidorb.AudioWaveFormFX_V1.v_aa;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.AudioSpectrumListener;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class AWF_FX_v5 extends Application implements AudioSpectrumListener {

    public final static String TITLE = "AWF special program";
    public final static short WIDTH = 1280;
    public final static short HEIGHT = 720;
    public static String AUDIO_FILE = "../mp3Music/Cynematic - Waterbased.mp3";
    public static String AUDIO_FILE1 = "../mp3Music/AcerDroid -Skies.mp3";
    public static String AUDIO_FILE2 = "../mp3Music/Capturez - Patterns.mp3";
    public static String AUDIO_FILE3 = "../mp3Music/Kanooli - Instinct.mp3";
    public static String AUDIO_FILE4 = "../mp3Music/RavenKreyn_InTheAir_NCSrelease.mp3";
    public static String AUDIO_URI = AWF_FX_v1.class.getResource(AUDIO_FILE1).toExternalForm();

    private Stage window;
    private Scene mainS;
    private Group groupS;
    private MediaPlayer audioMP;
    private float[] cMag;
    private short power = 5;

    private Rectangle[] rect = new Rectangle[40];

    @Override
    public void spectrumDataUpdate(double timestamp, double duration, float[] magnitudes, float[] phases) {
        for (int i = 0; i < magnitudes.length; i++) {
            cMag = magnitudes;
            cMag[i] = (int) cMag[i] * power;
            System.out.println("cMag (" + i + "): " + cMag[i]);
        }

        for(int i = 0; i < rect.length; i++) {
            rect[i].setY(500 + ((cMag[i] + (60 * power)) * -1));
            rect[i].setHeight(50 + (cMag[i] + (60 * power)));
        }
    }

    @Override
    public void start(Stage primaryStage) {
        groupS = new Group();
        mainS = new Scene(groupS, WIDTH, HEIGHT, Color.DARKBLUE);
        window = primaryStage;
        window.setScene(mainS);
        window.setTitle(TITLE);
        window.show();

        Media audioMedia = new Media(AUDIO_URI);
        audioMP = new MediaPlayer(audioMedia);
        audioMP.play();
        audioMP.setCycleCount(MediaPlayer.INDEFINITE);
        audioMP.setVolume(0.02);
        audioMP.setAudioSpectrumInterval(0.01);
        audioMP.setAudioSpectrumNumBands(40);
        audioMP.setAudioSpectrumListener(this);

        for(int i = 0; i < rect.length; i++) {
            rect[i] = new Rectangle();
            rect[i].setX(250 + (i * 20));
            rect[i].setY(500);
            rect[i].setWidth(10);
            rect[i].setHeight(50); …

code without that comments lines:

package com.VINSTORM.bleidorb.AudioWaveFormFX_V1.v_aa;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.AudioSpectrumListener;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class AWF_FX_v1 extends Application implements AudioSpectrumListener {

    public final static String TITLE = "AWF special program";
    public final static short WIDTH = 1280;
    public final static short HEIGHT = 720;
    public static String AUDIO_FILE = "../mp3Music/Cynematic - Waterbased.mp3";
    public static String AUDIO_FILE1 = "../mp3Music/AcerDroid -Skies.mp3";
    public static String AUDIO_FILE2 = "../mp3Music/Capturez - Patterns.mp3";
    public static String AUDIO_FILE3 = "../mp3Music/Kanooli - Instinct.mp3";
    public static String AUDIO_FILE4 = "../mp3Music/RavenKreyn_InTheAir_NCSrelease.mp3";
    public static String AUDIO_URI = AWF_FX_v1.class.getResource(AUDIO_FILE2).toExternalForm();

    private Stage window;
    private Scene mainS;
    private Group groupS;
    private MediaPlayer audioMP;
    private float[] cMag;

    private Rectangle[] rect = new Rectangle[8];

    @Override
    public void spectrumDataUpdate(double timestamp, double duration, float[] magnitudes, float[] phases) {
        for (int i = 0; i < magnitudes.length; i++) {
            cMag = magnitudes;
            cMag[i] = (int) cMag[i];
        }
        for(int i = 0; i < rect.length; i++) {
            rect[i].setY(310 + ((cMag[i] + 60) * -1));
            rect[i].setHeight(50 + (cMag[i] + 60));
            System.out.println(i + " setY: " + rect[i].getY());
            System.out.println(i + " setHeight " + rect[i].getHeight());
        }
    }

    @Override
    public void start(Stage primaryStage) {
        groupS = new Group();
        mainS = new Scene(groupS, WIDTH, HEIGHT, Color.DARKBLUE);
        window = primaryStage;
        window.setScene(mainS);
        window.setTitle(TITLE);
        window.show();

        Media audioMedia = new Media(AUDIO_URI);
        audioMP = new MediaPlayer(audioMedia);
        audioMP.play();
        audioMP.setCycleCount(MediaPlayer.INDEFINITE);
        audioMP.setVolume(0.02);
        audioMP.setAudioSpectrumInterval(0.01);
        audioMP.setAudioSpectrumNumBands(8);
        audioMP.setAudioSpectrumListener(this);

        rect[0] = new Rectangle(250, HEIGHT / 2 - 50, 50, 50);
        rect[0].setFill(Color.AZURE);
        rect[1] = new Rectangle(350, HEIGHT / 2 - 50, 50, 50);
        rect[1].setFill(Color.CORNFLOWERBLUE);
        rect[2] …

This is what I right now have:
Right now I am facing how to make these rectangles make more reactive like they change about 60 pixels maximal higher and I want to make it more than 60 pixels. Now I don't have a question this is just an update for my code.

package com.VINSTORM.bleidorb.AudioWaveFormFX_V1.v_aa;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.AudioSpectrumListener;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class AWF_FX_v1 extends Application implements AudioSpectrumListener {

    public final static String TITLE = "AWF special program";
    public final static short WIDTH = 1280;
    public final static short HEIGHT = 720;
    public static String AUDIO_FILE = "../mp3Music/Cynematic - Waterbased.mp3";
    public static String AUDIO_FILE1 = "../mp3Music/AcerDroid -Skies.mp3";
    public static String AUDIO_FILE2 = "../mp3Music/Capturez - Patterns.mp3";
    public static String AUDIO_FILE3 = "../mp3Music/Kanooli - Instinct.mp3";
    public static String AUDIO_FILE4 = "../mp3Music/RavenKreyn_InTheAir_NCSrelease.mp3";
    public static String AUDIO_URI = AWF_FX_v1.class.getResource(AUDIO_FILE2).toExternalForm();

    private Stage window;
    private Scene mainS;
    private Group groupS;
    private MediaPlayer audioMP;
    private float[] cMag;

//  private Rectangle rect0;
//  private Rectangle rect1;
//  private Rectangle rect2;
//  private Rectangle rect3;
//  private Rectangle rect4;
//  private Rectangle rect5;
//  private Rectangle rect6;
//  private Rectangle rect7;

    private Rectangle[] rect = new Rectangle[8];

    @Override
    public void spectrumDataUpdate(double timestamp, double duration, float[] magnitudes, float[] phases) {
        for (int i = 0; i < magnitudes.length; i++) {
            cMag = magnitudes;
            cMag[i] = (int) cMag[i];
            //System.out.println((i + 1) + ": " + (cMag[i] * -1));
        }
        for(int i = 0; i < rect.length; i++) {
            rect[i].setY(310 + …

that v7 -> v1 is not accidental. I just made a new package in v7.
if I placed the class just in v7, the error is gone and the music can play, but if the class is inside of v7.v1 then I get that error.

I got a error from this: "public static String AUDIO_URI = AWF_Core.class.getResource(AUDIO_FILE).toExternalForm();"
I made a new class, so the code looks more cleaner and readable.
but unfortunatly I don't know what happened?

I got a error:

Exception in thread "JavaFX Application Thread" Exception in thread "main" java.lang.ExceptionInInitializerError
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplicationWithArgs$2(LauncherImpl.java:352)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$3(WinApplication.java:177)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
    at com.VINSTORM.bleidorb.AudioWaveFormFX_V1.v7.v1.AWF_Core.<clinit>(AWF_Core.java:18)
    ... 11 more
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.NullPointerException
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:383)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    ... 5 more

this is how my project folders looks like in the navigator.

here is my new code:

package com.VINSTORM.bleidorb.AudioWaveFormFX_V1.v7.v1;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.AudioSpectrumListener;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class AWF_Core extends Application implements AudioSpectrumListener {

    public final static String TITLE = "AWF special program";
    public final static short WIDTH = 1280;
    public final static short HEIGHT = 720;
    public static String AUDIO_FILE = "../mp3Music/Cynematic - Waterbased.mp3";
    public static String AUDIO_URI = AWF_Core.class.getResource(AUDIO_FILE).toExternalForm();

    private Stage window;
    private Scene mainS;
    private Group groupS;
    private static MediaPlayer audioMP;

    @Override
    public void spectrumDataUpdate(double timestamp, double duration, float[] magnitudes, float[] phases) {
        System.out.println("data updated");
        displayMag(magnitudes);
    }

    public void displayMag(float[] mag) {
        for(int i = 0; i < mag.length; i++) {
            System.out.println(i+": " + mag[i]);
        }
        System.out.println("length of mag = " + mag.length);
    }

    public void init() { …

this is what the console says:

data updated
0: -59.407444
1: -48.37642
2: -41.535774
3: -40.149982
4: -44.27457
5: -44.982887
6: -48.725376
7: -52.21941
8: -54.77891
9: -50.22617
10: -53.42569
11: -55.172703
12: -55.079517
13: -53.60956
14: -53.745964
15: -57.46172
16: -57.445312
17: -57.044395
18: -52.888622
19: -54.909782
20: -57.15198
21: -56.71712
22: -56.429665
23: -57.09065
24: -57.157146
25: -57.19809
26: -57.740284
27: -56.86342
28: -56.226715
29: -57.350414
30: -57.268696
31: -57.377327
32: -57.740887
33: -56.40759
34: -55.88547
35: -56.44446
36: -57.326187
37: -57.204216
38: -55.604618
39: -55.611687
40: -56.671505
41: -55.99083
42: -54.81242
43: -54.81779
44: -55.155308
45: -54.862213
46: -56.785095
47: -57.21616
48: -56.16005
49: -56.611744
50: -57.336994
51: -56.80366
52: -56.719086
53: -56.731297
54: -57.696148
55: -56.97476
56: -57.19966
57: -56.635822
58: -56.079693
59: -56.365444
60: -56.58281
61: -57.3104
62: -57.90639
63: -57.26793
64: -57.42998
65: -58.106003
66: -56.51674
67: -55.527695
68: -55.31978
69: -56.59834
70: -57.75076
71: -57.570744
72: -55.88267
73: -55.103874
74: -56.05077
75: -56.008892
76: -55.499
77: -56.47118
78: -56.83968
79: -57.00147
80: -56.647213
81: -56.488712
82: -55.836987
83: -56.97192
84: -57.72063
85: -58.830986
86: -58.433346
87: -57.937386
88: -58.045086
89: -57.081215
90: -56.94066
91: -57.460472
92: -57.537506
93: -57.83281
94: -58.671604
95: -58.726414
96: -58.39954
97: -57.964382
98: -59.422413
99: -58.608257
100: -56.711
101: -57.214962
102: -58.341293
103: -58.0045
104: -58.1659
105: -57.890232
106: -57.620907
107: -58.689537
108: -58.754578
109: -58.455357
110: -58.3346
111: -57.839603
112: -58.051525
113: -58.993805
114: -59.581917
115: -59.176373
116: -58.17461
117: -59.15124
118: -59.001194
119: -58.830784
120: -58.5519 …

yes! Now I can finally use the values :D

this is my code:

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.AudioSpectrumListener;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class AWF_Main extends Application implements AudioSpectrumListener {

    public final static String TITLE = "AWF special program";
    public final static short WIDTH = 1280;
    public final static short HEIGHT = 720;
    public static String AUDIO_FILE = "../mp3Music/Cynematic - Waterbased.mp3";
    public static String AUDIO_URI = AWF_Main.class.getResource(AUDIO_FILE).toExternalForm();

    private Stage window;
    private Scene mainS;
    private Group groupS;
    private static MediaPlayer audioMP;

    @Override
    public void spectrumDataUpdate(double timestamp, double duration, float[] magnitudes, float[] phases) {
        System.out.println("data updated");
        displayMag(magnitudes);
        for(int i = 0; i < magnitudes.length; i++) {
            //correctedMagnitude[i] = magnitudes[i] - audioMP.getAudioSpectrumThreshold();
//            System.out.println("0"+magnitudes[0]);
//            System.out.println("1"+magnitudes[1]);
//            System.out.println("2"+magnitudes[2]);
//            System.out.println("3"+magnitudes[3]);
//            System.out.println("4"+magnitudes[4]);
//            System.out.println("5"+magnitudes[5]);
//            System.out.println("6"+magnitudes[6]);
//            System.out.println("7"+magnitudes[7]);
//            System.out.println("8"+magnitudes[8]);
//            System.out.println("9"+magnitudes[9]);
            //System.out.println(correctedMagnitude[i]);
        }
    }

    public void displayMag(float[] mag) {
        for(int i = 0; i < mag.length; i++) {
            System.out.println(i+": " + mag[i]);
        }
        System.out.println("length of mag = " + mag.length);
    }

    public void init() {
        Media audioMedia = new Media(AUDIO_URI);
        audioMP = new MediaPlayer(audioMedia);
        play();
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        groupS = new Group();
        mainS = new Scene(groupS, WIDTH/2, HEIGHT/2, Color.DEEPPINK);
        window = primaryStage;
        window.setScene(mainS);
        window.setTitle(TITLE);
        window.show();
    }

    //audioMP.setVolume(0.02); is low, because I just like to listen in low volume while I listen to other music. (:
    public void play() {
        audioMP.play();
        audioMP.setVolume(0.02);
        audioMP.setAudioSpectrumInterval(0.5);
        audioMP.setAudioSpectrumNumBands(256);
        audioMP.setAudioSpectrumListener(this);
        //AWF_newClass.printOutMagnitudes();
    }

    public void stop() {
        System.out.println("program exited");
    }

    public static void main(String[] args) …

at com.VINSTORM.bleidorb.AudioWaveFormFX_V1.v1.AWF_Main.start(AWF_Main.java:52) = System.out.println(correctedMagnitude[5]);

btw, this is a link too:
jnlps://download.oracle.com/otndocs/products/javafx/8/samples/Ensemble/Ensemble.jnlp
there is a audiobarchart.

I just want to System.out.println(magnitudes[i]);
in the start method, but how do I even do that?
I tried this:

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.AudioSpectrumListener;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class AWF_Main extends Application implements AudioSpectrumListener {

    public final static String TITLE = "AWF special program";
    public final static short WIDTH = 1280;
    public final static short HEIGHT = 720;
    public static String AUDIO_FILE = "../mp3Music/Cynematic - Waterbased.mp3";
    public static String AUDIO_URI = AWF_Main.class.getResource(AUDIO_FILE).toExternalForm();

    private Stage window;
    private Scene mainS;
    private Group groupS;
    private AudioSpectrumListener asl;
    private static MediaPlayer audioMP;
    private float[] correctedMagnitude;

    @Override
    public void spectrumDataUpdate(double timestamp, double duration, float[] magnitudes, float[] phases) {
        for(int i = 0; i < magnitudes.length; i++) {
            correctedMagnitude[i] = magnitudes[i] - audioMP.getAudioSpectrumThreshold();
            //System.out.println(correctedMagnitude[i]);
        }
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        groupS = new Group();
        mainS = new Scene(groupS, WIDTH, HEIGHT, Color.DEEPPINK);
        window = primaryStage;
        window.setScene(mainS);
        window.setTitle(TITLE);
        window.show();

        // setup media
        Media audioMedia = new Media(AUDIO_URI);
        audioMP = new MediaPlayer(audioMedia);
        audioMP.setAudioSpectrumListener(this);
        play();

        //correctedMagnitude[5], why 5, because I chosed a random number.
        System.out.println(correctedMagnitude[5]);
    }

    //audioMP.setVolume(0.02); is low, because I just like to listen in low volume while I listen to other music. (:
    public void play() {
        audioMP.play();
        audioMP.setVolume(0.02);
        audioMP.setAudioSpectrumInterval(60.0);
        audioMP.setAudioSpectrumNumBands(256);
    }

    public void stop() {
        System.out.println("program exited");
    }

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

I don't want to use charts.

here is my Error:

Exception in Application start method
program exited
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at …

I just need the magnitudes to be accesable from the whole class.
(btw, I am going to remove animationtimer

So I am making a responsive audio waveform, if you don't know what that is, it is something like this: (btw this is my goal to make those audio waveforms).
https://i.ytimg.com/vi/J7uN-SQtOYI/maxresdefault.jpg
https://www.youtube.com/watch?v=OVMuwa-HRCQ
https://www.youtube.com/watch?v=SCD2tB1qILc
I don't know how to describe it, so just look at the videos and image.

but my question is, how do I get the values from the "AudioSpectrumListener", it has a lambda expression.
And I need the value of the magnitude. So I can print out the values.
Later I will use the values to make rectangles and that rectangles will change height shape because of the changing value from the magnitude.

I looked at some examples and tutorials, here are some:
jnlps://download.oracle.com/otndocs/products/javafx/8/samples/Ensemble/Ensemble.jnlp
https://victor-fx.blogspot.com/2017/08/audio-visualization-in-javafx.html

as you can see, I used animation timer, because the "AudioSpectrumInterval" is on 60, that means it updates 60 times in a second.
I can use a for a loop too, but it will print out the same values about a couple of times, or even more than that.

I was kinda stuck, but I finally got it. I just forgot that the thread starts first then the initialize.
it is now fixed. Here is the complete code:

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class Server extends Application implements Runnable {

    private Group serverGR;
    private Scene serverSC;
    private Stage window;
    private TextField tf;
    private TextArea ta;

    private ServerSocket ss;
    private Socket s;
    private DataInputStream dis;
    private DataOutputStream dos;

    public void init() {

    }

    @Override
    public void start(Stage primaryStage) {
        try {
            serverGR = new Group();
            serverSC = new Scene(serverGR, 800, 500, Color.LIGHTCYAN);
            window = primaryStage;
            window.setTitle("Bleidorb Simplistic ChatProgram \\\\\\\\\"ServerMode\"\\\\\\\\");
            window.setScene(serverSC);
            window.show();

            tf = new TextField();
            tf.setTranslateX(10);
            tf.setTranslateY(10);
            tf.setPrefWidth(400);
            tf.setPrefHeight(20);
            tf.appendText("Type your message here.");
            tf.setOnAction(event -> {

                String server = "Server: ";
                server += tf.getText();
                try {
                    dos.writeUTF(server);
                    ta.appendText(server + "\n");
                    // ta.appendText(dis.readUTF() + "\n");
                    dos.flush();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                tf.clear();
            });

            ta = new TextArea();
            ta.setTranslateX(10);
            ta.setTranslateY(40);
            ta.setPrefWidth(400);
            ta.setPrefHeight(400);

            serverGR.getChildren().addAll(tf, ta);

            try {
                new Thread(this).start();
                } catch (Exception e) {
                    e.printStackTrace();
                }

        } catch (Exception e) {
            System.out.println(e.toString() + "\n something wrong in startmethod, lol?");
        }
    }

    @SuppressWarnings("deprecation")
    public void stop() {
        try {
            new Thread(this).stop();
            dis.close();
            ss.close();
            s.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

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

    @Override
    public void run() {
        try {
            ss = new ServerSocket(5279, 100);
            s = ss.accept();
            s.setTcpNoDelay(true);
            dis = new DataInputStream(s.getInputStream());
            dos = …