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

public class Tekst2a extends Applet implements ActionListener{
  TextField pikkus=new TextField(" 100 ");
  Button nupp=new Button("  OK  ");
  public Tekst2a(){
    add(pikkus);
    add(nupp);
    nupp.addActionListener(this);
  }

  public void actionPerformed(ActionEvent e){
    int nr=Integer.parseInt(pikkus.getText().trim());
    Graphics g=this.getGraphics();
    g.setColor(Color.white);
    g.fillRect(0, 0, getSize().width, getSize().height);
    g.setColor(Color.black);
    g.drawRect(10, 50, nr, nr);
  }
  
  public static void main(String argumendid[]){
    Frame f=new Frame("Ruudu joonistamine");
    f.setSize(300, 300);
    f.add(new Tekst2a());
    f.setVisible(true);
  }    

}