JFrame container = new JFrame("Your Game"); //This creates the frame object, and sets the window name.
      JPanel panel = (JPanel) container.getContentPane(); //This initializes the panel, which in our case is just for setting the size of the window..
      panel.setPreferredSize(new Dimension(800, 600)); //Dimensions
      
      setBounds(0,0,800+16,600+16); //Window bounds, how big the drawing part is, essentially.
      panel.add(this); //Then, implement it.
      
      setIgnoreRepaint(true); //So we can make our own double buffer to refresh the screen.
      
      container.pack(); //Pack the container so that it's ready to use, essentially. 
      container.setResizable(false); //Set the window to not be resizable.
      container.setVisible(true); //Make the window visible.

      createBufferStrategy(2); //Make your buffer strategy.
      strategy = getBufferStrategy();
      
      container.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Make sure the container closes the window when you're done. 

while (gameRunning){ //Boolean to tell the game it's running, and basically makes the infinite loop of the game.
         //The Buffer.
         Graphics2D g = (Graphics2D) strategy.getDrawGraphics();
         g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); //Smoothing of text and what-not. Optional.
         g.setColor(Color.black); //The color of the buffer.
         g.fillRect(0,0,800+16,600+16); //Painting a rectangle over the last frame, so that the new one can be painted without the old one still being there to look bad. 
         
         //Do stuff here. Like drawing, and logic. Make sure they're separated in their own respect though.
         
         //Flip the buffer.
         g.dispose();
         strategy.show();
         
         try{ Thread.sleep(30); } catch(Exception e){
            //Put your handling here.
         }
      }

public static void main(String args[]){
      gameRunning = true;
      game.loop();
   }