Java Graphics2D闪烁问题

Question

我正在使用内置的Java Graphics2D在java中制作基于tile的装备游戏。我的问题是，当玩家在地图上移动时，我的屏幕会闪烁。地图滚动（意味着玩家停留在屏幕的中心）。当地图移动时，它会闪烁。我已经使用过缓冲技术，但无济于事。我的主要代码如下：

package dev.thenamegenerator.MasterQuestAlpha.display;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;

import dev.thenamegenerator.MasterQuestAlpha.collision.WaterCollision;
import dev.thenamegenerator.MasterQuestAlpha.entities.MainPlayer;
import dev.thenamegenerator.MasterQuestAlpha.gfx.Assets;
import dev.thenamegenerator.MasterQuestAlpha.world.MovingMap;
import dev.thenamegenerator.MasterQuestAlpha.world.World;
import dev.thenamegenerator.MasterQuestAlpha.world.WorldRenderer;

public class Board extends Canvas implements Runnable
{

    private static final long serialVersionUID = 1L;

    private MainPlayer player;
    private MovingMap wholeMap;
    private World map;
    private WaterCollision watercollision;
    private WorldRenderer render;
    private int frames = 0;
    private int ticks = 0;

    Graphics2D g2d;
    public Thread thread;

    Image currentWorld;

    private int width = 480;
    private int height = 374;

    public static boolean running = false;

    public Board(){
        addKeyListener(new TAdapter());
        setFocusable(true);
    }

    public synchronized void start(){
        if(running)return;
        running = true;
        thread = new Thread(this);
        thread.start();
    }

    public synchronized void stop(){
        if(!running)return;
        running = false;
        try {
            thread.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void init(){     
        Assets.init();
        map = new World();
        player = new MainPlayer(224,128);
        render = new WorldRenderer();

        watercollision = new WaterCollision(map.getStartMap(), map.getRightMap());
        watercollision.initCollision();

        render.renderWorld(map.getStartMap(), map.getRightMap());

        wholeMap = new MovingMap(render.getImage(), 0, 0);
    }

    public void tick() {
        wholeMap.move();
        watercollision.updateWaterBlocks(wholeMap.getDx(), wholeMap.getDy());
        checkCollision();
    }

    public void render(){
        BufferStrategy bs = this.getBufferStrategy();
        if(bs == null){
            createBufferStrategy(2);
            return;
        }
        Graphics g = bs.getDrawGraphics();
        g2d = (Graphics2D) g;
        //CLEARS SCREEN
        g2d.setColor(Color.BLACK);
        g2d.fillRect(0, 0, width, height);
        //RENDER HERE
        g2d.drawImage(wholeMap.getMapImage(), wholeMap.getX(), wholeMap.getY(), null);
        g2d.drawImage(player.getImage(), 224, 128, this);
        //END RENDER
        g2d.dispose();
        g.dispose();
        bs.show();
    }

    public void run(){
        init();
        long lastTime = System.nanoTime();
        final double amountOfTicks = 60D;
        double ns = 1000000000D/amountOfTicks;
        double delta = 0;

        long lastTimer = System.currentTimeMillis();

        while(running){
            long now = System.nanoTime();
            delta += (now-lastTime)/ns;
            lastTime = now;
            if(delta>=1){
                ticks++;
                tick();
                delta--;
            }
            try {
                Thread.sleep(2);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            frames++;
            render();
            if(System.currentTimeMillis() - lastTimer >= 1000){
                lastTimer+=1000;
                System.out.println("Frames: " + frames + ", ticks:" + ticks);
                frames = 0;
                ticks = 0;
            }
        }
        stop();
    }

    public void checkCollision(){
        if(player.getX() == (wholeMap.getX()-32)){
            wholeMap.resetPreviousLocation();
            watercollision.updateWaterBlocks(wholeMap.getDx(), wholeMap.getDy());
            wholeMap.setDx(0);
            wholeMap.setDy(0);
            //System.out.println("Collision Detected!");
        }
        if(player.getX() == (wholeMap.getX()+wholeMap.getWidth()-32)){
            wholeMap.resetPreviousLocation();
            watercollision.updateWaterBlocks(wholeMap.getDx(), wholeMap.getDy());
            wholeMap.setDx(0);
            wholeMap.setDy(0);
            //System.out.println("Collision Detected!");
        }
        if(player.getY() == (wholeMap.getY() - 32)){
            wholeMap.resetPreviousLocation();
            watercollision.updateWaterBlocks(wholeMap.getDx(), wholeMap.getDy());
            wholeMap.setDx(0);
            wholeMap.setDy(0);
            //System.out.println("Collision Detected!");
        }
        if(player.getY() == (wholeMap.getY() + wholeMap.getHeight())){
            wholeMap.resetPreviousLocation();
            watercollision.updateWaterBlocks(wholeMap.getDx(), wholeMap.getDy());
            wholeMap.setDx(0);
            wholeMap.setDy(0);
            //System.out.println("Collision Detected!");
        }
        if(watercollision.checkWaterCollisionX(player.getX(), player.getY())){
            wholeMap.resetPreviousLocation();
            watercollision.updateWaterBlocks(wholeMap.getDx(), wholeMap.getDy());
            wholeMap.setDx(0);
            wholeMap.setDy(0);
            //System.out.println("VIKA");
        }

    }

    private class TAdapter extends KeyAdapter {
        public void keyReleased(KeyEvent e) {
            wholeMap.keyReleased(e);
            player.keyReleased(e);
        }
        public void keyPressed(KeyEvent e) {
            wholeMap.keyPressed(e);
            player.keyPressed(e);
        }
    }
}

我该怎么办？