Snake Game in Java

keyinputs.class is to use keylistener and keybord inputs

import java.awt.event.*;
import java.awt.*;
public class keyinputs extends engerekcore implements KeyListener{
 public static void main(String[] args){
  new keyinputs().run();
 }
 
 
 public String tostring(int a){
  return mess+""+a;
 }
 public String tostring2(int a){
  return mess3+""+a;
 }
 public int getsonrakiyon(){
  return sonrakiyon;
 }
 public void init(){
  super.init();
  Window w = s.getFullScreenWindow();
  w.setFocusTraversalKeysEnabled(false);
  w.addKeyListener(this);
 }
 
 //keypressed
 public void keyPressed(KeyEvent e){
  int keyCode = e.getKeyCode();
  
  if(keyCode == KeyEvent.VK_ENTER){//to stop //oyunu durdurur
   pause = true;
   becontinue = false;
  }
  if(keyCode == KeyEvent.VK_SPACE){
   pause = false;
   becontinue = true;
  } 
  if(keyCode == KeyEvent.VK_BACK_SPACE)
   continued = true;
  if(keyCode == KeyEvent.VK_ESCAPE){//to exit //oyundan çıkar
   stop();
  }else{
   yon = sonrakiyon;
   if(keyCode == KeyEvent.VK_W)
    if(yon!=kuzey && yon!=guney)
    sonrakiyon = kuzey;
   if(keyCode == KeyEvent.VK_S)
    if(yon!=guney && yon!=kuzey)
    sonrakiyon = guney;
   if(keyCode == KeyEvent.VK_A)
    if(yon!=bati && yon!=dogu)
    sonrakiyon = bati;
   if(keyCode == KeyEvent.VK_D)
    if(yon!=dogu && yon!=bati)
    sonrakiyon = dogu;
   e.consume();
  }
 }
 
 //keyReleased
 public void keyReleased(KeyEvent e){
  e.consume();
 }
 
 //last method from interface
 public void keyTyped(KeyEvent e){
  e.consume();
 }
 //engerekcoredaki draw metoduyla eş zamanlı çalışır//run in the same time with draw method in engerekcore  
 public synchronized void draw(Graphics2D g){
  
  Window w = s.getFullScreenWindow();//tam ekrana geçiş
  g.setColor(w.getBackground());//arka ekran rengi
  g.fillRect(0, 0, s.getWidth(), s.getHeight());
  g.setColor(w.getForeground());//ön ekran rengi
  g.setFont(new Font("Matisse ITC",1,18));//yazı biçimi
  for(int i=0;i<coord.size();i++)//yılanın ekrana bastırılması //drawing snake
   g.drawImage(coord.get(i).gethead(),coord.get(i).getx(),coord.get(i).gety(),null);
  for(int j=0;j<=780;j+=20){
   g.drawImage(wall,j,0,null);
   g.drawImage(wall,j,560,null);
   }
  for(int k=0;k<=560;k+=20){
   g.drawImage(wall,0,k,null);
   g.drawImage(wall,780,k,null);
   }
  for(int m = 0;m<8;m++)//yemin ekrana bastırılması //drawing seed
  g.drawImage(food.get(m).gethead(),food.get(m).getx(),food.get(m).gety(),null);
  g.drawString(tostring(score),570 ,595);
  g.drawString(mess2,100,595);
  g.drawString(tostring2(dead), 300, 595);
 }
 public synchronized void draw2(Graphics2D g){
  Window w = s.getFullScreenWindow();
  g.setColor(w.getBackground());
  g.fillRect(0, 0, s.getWidth(), s.getHeight());
  g.setColor(w.getForeground());
  g.setFont(new Font("Matisse ITC",1,50));
  g.drawString(mess5, 300, 250);
  g.drawString(mess6, 100, 350);
 }
 public synchronized void draw3(Graphics2D g){
  Window w = s.getFullScreenWindow();
  g.setColor(w.getBackground());
  g.fillRect(0, 0, s.getWidth(), s.getHeight());
  g.setColor(w.getForeground());
  g.setFont(new Font("Matisse ITC",1,50));
  g.drawString(mess4, 300, 250);
 }
}