Basic Rendering Code

DoubleBufferDemo.java

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics2D;
import java.awt.Toolkit;
import java.awt.image.BufferStrategy;
import java.util.Timer;
import java.util.TimerTask;

public class DoubleBufferDemo extends Canvas {

    static {
        System.setProperty("sun.java2d.trace", "timestamp,log,count");
        System.setProperty("sun.java2d.transaccel", "True");
        System.setProperty("sun.java2d.opengl", "True");
        // System.setProperty("sun.java2d.d3d", "false"); //default on windows
        // System.setProperty("sun.java2d.ddforcevram", "true");
    }

    private BufferStrategy strategy;
    private final Timer timer;
    private TimerTask renderTask;
    
    public DoubleBufferDemo() {

        this.setIgnoreRepaint(true);

        timer = new Timer(); // used for the render thread

    }
    
    public void render() {

        Graphics2D bkG = (Graphics2D) strategy.getDrawGraphics();
        
        bkG.setColor(Color.BLACK);
        bkG.fillRect(0, 0, getWidth(), getHeight());

        // TODO: Do your rendering here

        bkG.dispose();
        strategy.show();
        Toolkit.getDefaultToolkit().sync();

    }

    public void setup() {
        this.createBufferStrategy(2);
        strategy = this.getBufferStrategy();

        start();
    }

    public void start() {

        if (renderTask != null) {
            renderTask.cancel();
        }

        renderTask = new TimerTask() {
            long	lasttime	= System.currentTimeMillis();

            @Override
            public void run() {

                long time = System.currentTimeMillis();
                double dt = (time - lasttime) * 0.001;

                lasttime = time;
                render();
            }
        };

        timer.schedule(renderTask, 0, 16);
    }

    protected void stop() {
        renderTask.cancel();
    }

    public static void main(String[] args) {
        
        final Frame frame = new Frame("Rendering Demo");
        frame.setLayout(new BorderLayout());
        
        final DoubleBufferDemo canvas = new DoubleBufferDemo();
        frame.add(canvas);

        frame.setSize(800, 600); 
        frame.setLocationRelativeTo(null); 
        frame.setVisible(true); 

        canvas.setup();
    }

}