Trying to use VBOs & VAOs in JOGL (OpenGL) throws an exception wherein a buffer cannot be found

Question

I am completely stuck here, so any help would be appreciated :/

I'm trying to learn how to use OpenGL 4.0 using it's Java Bindings, JOGL. It seems like now it's better to use VBO/VAOs as opposed to glBegin/End.

I'm following various sources, but for this specific aspect I used this: https://learnopengl.com/Getting-started/Hello-Triangle (C++)

Unfortunately, when I run my program, it throws the following exception (@ Line 41): "Exception in thread "AWT-EventQueue-0" com.jogamp.opengl.GLException: Caught GLException: GL_INVALID_OPERATION: Buffer for target 0x8892 not bound on thread AWT-EventQueue-0"

Here's my full GLEventListener implementing class (Renderer):

package pRendering;

import com.jogamp.common.nio.Buffers;
import com.jogamp.opengl.GL;
import com.jogamp.opengl.GL4;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLEventListener;

import java.nio.FloatBuffer;
import java.nio.IntBuffer;

public class Renderer implements GLEventListener {

    public int vShaderProgramID;
    public int vVertShaderID;
    public int vFragShaderID;

    public int vVBO_ID;
    public IntBuffer vVBO; //uint pointer?

    public int vVAO_ID;
    public IntBuffer vVAO; //uint pointer?

    //region tmp
    float vertices[] = {
            -0.5f, -0.5f, 0.0f,
            0.5f, -0.5f, 0.0f,
            0.0f,  0.5f, 0.0f
    };
    //endregion

    private void TriangleVBO_VAO(GL4 vGL){
        FloatBuffer vVertFloatBuffer = Buffers.newDirectFloatBuffer(vertices);

        vGL.glGenVertexArrays(1, vVAO);
        vGL.glGenBuffers(1, vVBO);

        vGL.glBindVertexArray(vVAO_ID);

        vGL.glBindBuffer(GL.GL_ARRAY_BUFFER, vVBO_ID);
        vGL.glBufferData(GL.GL_ARRAY_BUFFER, vVertFloatBuffer.capacity() * Buffers.SIZEOF_FLOAT, vVertFloatBuffer, GL.GL_STATIC_DRAW); // <---

        vGL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, false, 3 * 4 /*sizeof(float)*/, 0);
        vGL.glEnableVertexAttribArray(0);

        vGL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0);

        vGL.glBindVertexArray(0);
    }

    @Override
    public void init(GLAutoDrawable glAutoDrawable) {
        GL4 vGL = glAutoDrawable.getGL().getGL4();

        vShaderProgramID = vGL.glCreateProgram();
        try {
            vVertShaderID = Shaders.CreateShader(vGL, vShaderProgramID, GL4.GL_VERTEX_SHADER, "C:\\Users\\quent\\Desktop\\def.vshd");
            vFragShaderID = Shaders.CreateShader(vGL, vShaderProgramID, GL4.GL_FRAGMENT_SHADER, "C:\\Users\\quent\\Desktop\\def.fshd");

            Shaders.Link(vGL, vShaderProgramID);
        } catch (Exception EX) {
            EX.toString();
        }

        TriangleVBO_VAO(vGL);
    }

    @Override
    public void display(GLAutoDrawable glAutoDrawable) {
        GL4 vGL = glAutoDrawable.getGL().getGL4();

        vGL.glClear(GL4.GL_COLOR_BUFFER_BIT | GL4.GL_DEPTH_BUFFER_BIT);

        vGL.glUseProgram(vShaderProgramID);

        vGL.glBindVertexArray(vVAO_ID);

        vGL.glDrawArrays(GL.GL_TRIANGLES, 0, 3);
    }

    @Override
    public void dispose(GLAutoDrawable glAutoDrawable) {
        GL4 vGL = glAutoDrawable.getGL().getGL4();

        vGL.glDetachShader( vShaderProgramID, vVertShaderID);
        vGL.glDetachShader( vShaderProgramID, vFragShaderID);
        vGL.glDeleteProgram(vShaderProgramID);
    }

    @Override
    public void reshape(GLAutoDrawable glAutoDrawable, int i, int i1, int i2, int i3) {

    }
}

Answer 1

The name of the vertex array object and the buffer object is contained in the IntBuffer objects vVAO respectively vVBO. You missed to assign the content of the IntBuffers to the attributes vVAO_ID respectively vVBO_ID:

vVAO = GLBuffers.newDirectIntBuffer(1);
vVBO = GLBuffers.newDirectIntBuffer(1);

vGL.glGenVertexArrays(1, vVAO);
vVAO_ID = vVAO.get();

vGL.glGenBuffers(1, vVBO);
vVBO_ID = vVBO.get();