import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class Autosoit3 extends Applet implements KeyListener{
  double x=100, y=50, pikkus=30, a=Math.PI/6, da=0.1;
  double ks=5, kx, ky;

  public Autosoit3(){
    addKeyListener(this);
    arvutaKiiruseKomponendid();
  }
  public void paint(Graphics g){
    double x2=x+Math.cos(a)*pikkus;
    double y2=y+Math.sin(a)*pikkus;
    g.drawLine((int)x, (int)y, (int)x2, (int)y2);
    g.drawOval((int)x-5, (int)y-5, 10, 10);
  }
  void arvutaKiiruseKomponendid(){
    kx=Math.cos(a)*ks;
    ky=Math.sin(a)*ks;
  }
  public void keyPressed(KeyEvent e){
    int kood=e.getKeyCode();
    if(kood==KeyEvent.VK_LEFT){
       a=a-da;
       arvutaKiiruseKomponendid();
    }
    if(kood==KeyEvent.VK_RIGHT){
       a=a+da;
       arvutaKiiruseKomponendid();
    }
    if(kood==KeyEvent.VK_UP){
       x=x+kx;
       y=y+ky;
    }
    if(kood==KeyEvent.VK_DOWN){
       x=x-kx;
       y=y-ky;
    }
    repaint();
  }
  public void keyReleased(KeyEvent e){}
  public void keyTyped(KeyEvent e){}
  public static void main(String[] arg){
    Frame f=new Frame("Joonest auto");
    f.add(new Autosoit3());
    f.setSize(200, 200);
    f.setVisible(true);
  }
}