GraphicsConfiguration gc = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getBestConfiguration(new GraphicsConfigTemplate3D());
Canvas3D canvas   = new Canvas3D(gc,true);

//Sets up the buffer and canvas for offscreen buffering
buffer   = new ImageComponent2D(ImageComponent2D.FORMAT_RGBA,new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB));
canvas.getScreen3D().setPhysicalScreenWidth(w);
canvas.getScreen3D().setPhysicalScreenHeight(h);
canvas.getScreen3D().setSize(w,h);
canvas.setOffScreenBuffer(buffer);

//Gets the screen buffer graphics
g = screen.getBufferGraphics();
	
//Do some 3d rendering...
canvas.renderOffScreenBuffer();
canvas.waitForOffScreenRendering();
			
//Moves the buffer
g.drawImage(buffer.getImage(),0,0,null);

//Shows the buffer
screen.getBufferStrategy().show();
			
//Frees more memory
g.dispose();