Snake Game in Java

engerekcore.java is need to run game

import java.awt.*;
//import javax.swing.*;

public abstract class engerekcore extends engerek{
 
 //ekran modları
 private static DisplayMode modes[] = {
  new DisplayMode(800,600,32,0),
  new DisplayMode(800,600,24,0),
  new DisplayMode(800,600,16,0),
  new DisplayMode(640,480,32,0),
  new DisplayMode(640,480,24,0),
  new DisplayMode(640,480,16,0),
 };
 private boolean running;
 protected screen s;
 
 //stop method
 public void stop(){
  running = false;
 }
 
 //call init and gameloop
 public void run(){
  try{
   init();
   start();
   gameLoop();
  }finally{
   s.restoreScreen();
  }
 }
 //set to full screen
 public void init(){
  s = new screen();
  DisplayMode dm = s.findFirstCompatibleMode(modes);
  s.setFullScreen(dm);
  
  Window w = s.getFullScreenWindow();
  w.setFont(new Font("Arial",Font.PLAIN,20));
  w.setBackground(Color.white);
  w.setForeground(Color.black);
  running = true;
 }
 //main gameLoop
 public void gameLoop(){
  long startTime = System.currentTimeMillis();
  long cumTime = startTime;
  
  while(running){
   Graphics2D g = s.getGraphics();
   long timePassed = System.currentTimeMillis() - cumTime;
   cumTime += timePassed;
   if(pause==false){
    if(lost!=false){
     try{
     draw2(g);
     g.dispose();
     
     if(continued){
     collision();
     s.update();
     continued = false;
     continue;
     }
     }catch(Exception ex){}
    }else
     update(timePassed);
     draw(g);
     g.dispose();
     s.update();
   }else{
    try{
     draw3(g);
     g.dispose();
     s.update();
     if(becontinue){
     continue;
     }
    }catch(Exception ex){}
   }
   
   try{
    Thread.sleep(20);
 
   }catch(Exception ex){}
   
  }
 }
 //update snake move
 public void update(long timePassed){
  lastmove += timePassed;
  if(lastmove>movedelay){
   snakeupdate();
   if(growup==true){
   seedupdate();
   growup = false;
   }
   lastmove = 0;
  }
 }
 //draw game screen
 public abstract void draw(Graphics2D g);
 //draw lost screen
 public abstract void draw2(Graphics2D g);
 //draw pause screen
 public abstract void draw3(Graphics2D g);
}