import dev.codenmore.tilegame.game;

     public class Khoichay {


        public static void main(String[] args) {

          game game=new game("gdg",400,400);
      game.start();

       }

       }

package dev.codenmore.tilegame.display;

          import java.awt.Canvas;
import java.awt.Dimension;

import javax.swing.JFrame;

public class Display {
private JFrame khuong;
private static Canvas giay;
private String tuade;
private int dai,rong;





    public Display(String tuade,int rong,int dai){
        this.tuade=tuade;
        this.dai=dai;
        this.rong=rong;
        taohienthi();
}


private void taohienthi() {

    khuong =new JFrame(tuade);
    khuong.setSize(dai, rong);
    khuong.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    khuong.setResizable(false);
    khuong.setVisible(true);
    khuong.setLocationRelativeTo(null);

    giay=new Canvas();
    giay.setPreferredSize(new Dimension(dai,rong));
    giay.setMaximumSize(new Dimension(dai,rong));
    giay.setMinimumSize(new Dimension(dai,rong));

    khuong.add(giay);
    khuong.pack();

}
public Canvas getCanvas(){

    return giay;
}
}

import java.awt.Graphics;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;

import dev.codenmore.tilegame.display.Display;
import dev.codenmore.tilegame.gfx.ImageLoader;

public class game implements Runnable{
private Display Display;
private Thread t;
private boolean running;
public int dai,rong;
private String tuade;
private BufferStrategy bs;
private Graphics g;
private BufferedImage testImage;
    public game(String tuade,int dai,int rong) {
    this.dai=dai;
    this.rong=rong;
this.tuade=tuade;

    }
    public void run(){
        init();

        while(running){
            tick();
            render();
        }
        stop();
    }
    private void render() {

        bs=Display.getCanvas().getBufferStrategy();
        if(bs==null){
            Display.getCanvas().createBufferStrategy(3);
            return;
        }
        g=bs.getDrawGraphics();
        g.drawImage(testImage, 20,20,null);
    }
    private void tick() {


    }
    private void init() {

        Display =new Display(tuade,dai,rong);
        testImage=ImageLoader.loadImage("/textures/Long.png");
    }
    public synchronized void start(){
        if(running)
            return;
        running=true;
        t=new Thread(this);
        t.start();

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

            e.printStackTrace();
        }

    }

}

    enter code here