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

public class Exam2 extends Applet implements KeyListener{
  double x=200, y=200;
  double nurk=0, pikkus=40, samm =10;

  public Exam2(){
    addKeyListener(this);
  }

  public void paint(Graphics g){
    double x2=x+pikkus*Math.cos(nurk);
    double y2=y+pikkus*Math.sin(nurk);
    g.drawLine((int)x, (int)y, (int)x2, (int)y2);
  }

  public void keyPressed(KeyEvent e){
    int kood=e.getKeyCode();
    if(kood==KeyEvent.VK_LEFT)nurk=nurk-0.1;
    if(kood==KeyEvent.VK_RIGHT)nurk=nurk+0.1;
    if(kood==KeyEvent.VK_UP){
      x=x+Math.cos(nurk)*samm;
      y=y+Math.sin(nurk)*samm;
    }
	if(kood==KeyEvent.VK_DOWN){
      x=x-Math.cos(nurk)*samm;
      y=y-Math.sin(nurk)*samm;
	}
    repaint();
  }

  public void keyReleased(KeyEvent e){}

  public void keyTyped(KeyEvent e){}
  

  public static void main(String argumendid[]){
    Frame f=new Frame("Autosőit");
    f.add(new Exam2());
    f.setSize(400, 400);
    f.setVisible(true);  
  }
}