import java.awt.*;
import java.applet.*;
public class Teljed extends Applet{
  public void paint(Graphics g){
    g.drawLine(100, 0, 100, getHeight());
    g.drawLine(  0, 200, getWidth(), 200);
    for(int x=-100; x<100; x++){
      g.drawOval(x+100, 200-x*x, 1, 1);
    }
  }

  public static void main(String argumendid[]){
    Frame f=new Frame("Ruutfunktsiooni graafik");
    f.add(new Teljed());
    f.setSize(250, 250);
    f.setVisible(true);
  }
}