I had a look at the bones examples, but it did not get very clear to me. This is my first try, but when starting the app, nothing is rendered.
I initialize the BoxSoft Class to create the world, the camera  and the framebuffer and give it as a Graphics to the canvas. I thought a loop is not necessary as the scene does not change or has any movement in it.

GUI:
package jPCT;

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JButton;
import java.awt.Canvas;

public class HelloGui extends JFrame {

private JPanel contentPane;

/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
HelloGui frame = new HelloGui();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}



public HelloGui() throws Exception {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 800, 600);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);

JButton btnTest = new JButton("Test 1");
btnTest.setBounds(10, 11, 89, 23);
contentPane.add(btnTest);

JButton btnTest_1 = new JButton("Test 2");
btnTest_1.setBounds(10, 45, 89, 23);
contentPane.add(btnTest_1);

JButton btnTest_2 = new JButton("Test 3");
btnTest_2.setBounds(10, 79, 89, 23);
contentPane.add(btnTest_2);

Canvas canvas = new Canvas();
canvas.setBounds(105, 10, 669, 542);
contentPane.add(canvas);

BoxSoft bs = new BoxSoft();
canvas.paint(bs.paint());

}
}

The "jPCT Class":
package jPCT;

import java.awt.Color;
import java.awt.Graphics;


import com.threed.jpct.FrameBuffer;
import com.threed.jpct.Object3D;
import com.threed.jpct.Primitives;
import com.threed.jpct.World;

public class BoxSoft {
private World world;
private FrameBuffer buffer;
private Object3D box;

public BoxSoft() {

world = new World();
// world.setAmbientLight(200, 255, 200);

// TextureManager.getInstance().addTexture("box", new Texture("box.jpg"));

box = Primitives.getBox(3f, 2f);
// box.setTexture("box");
// box.setEnvmapped(Object3D.ENVMAP_ENABLED);
box.build();
world.addObject(box);

world.getCamera().setPosition(50, -50, -5);
world.getCamera().lookAt(box.getTransformedCenter());
buffer = new FrameBuffer(660, 540, FrameBuffer.SAMPLINGMODE_NORMAL);

}
public Graphics paint(){
buffer.clear(java.awt.Color.DARK_GRAY);
world.renderScene(buffer);
world.drawWireframe(buffer, Color.WHITE);
buffer.update();

return buffer.getGraphics();

}


}


Hello,

I searched this site, but did not find any hint. I read the examples which render the "Hello World" in software, OpenGL and AWTGL, but I don't get the clue.
I have two problems:
1. I want to render a scene in a JPanel. As it is not very GPU demanding, software renderer will be enough - as I read, it is the only one really working with SWING components. Can someone give me an example? I thought, I've seen one somewhere in the wiki, but I can't find it anymore.

2. Is it possible to swap the HelloWorld class out of the "GUI class"?
As the GUI of the programme I want to write is very complex, I use WindowsBuilder in Eclipse, so I want to write a jPCT class and then just call it in the GUI. Is this possible?

Thanks in advance!