Problem med getDrawGraphics() med Canvas (Java)

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferStrategy;





public class PeachCanvas extends Canvas implements Runnable {
	Graphics g2d=null;
	BufferStrategy buffer=null;
	boolean button=false;
	int FWidth = 800;
	int FHeight = 600;
	Thread t;
	
	public  PeachCanvas(){
		this.setIgnoreRepaint(true);
		this.setBounds(0, 0, FWidth, FHeight);
		

	
		
	}
	public void addNotify() {
		super.addNotify();
		this.createBufferStrategy(2);
		this.buffer = this.getBufferStrategy();
		requestFocus();

		StartGame();
	}
	
	
	
	
	private void StartGame() {
		if (t == null) {
			t = new Thread(this);

			t.start();
		}
		
	}
	public void run() {
		while(true){
		
		try {
			t.sleep(100);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		

		
		
	    
		paint();
		Draw();
		
	}}

	
	
	public void paint(){
		g2d = buffer.getDrawGraphics();
	    g2d.setColor(Color.GREEN);
		g2d.fillRect(0, 0, 1000, 1000);
	    
		g2d.setColor(Color.BLUE);
		
		g2d.setColor(Color.BLACK);
		g2d.fillRect(10, 10, 100, 100);
		
		
		
	}

	public void Draw() {
		if (!buffer.contentsLost()) {
			buffer.show();

			if (g2d != null) {
				g2d.dispose();
			}
		}
	}
	

}