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


public class Esimene extends Applet implements ActionListener{
  public void paint(Graphics ekraan){
    ekraan.setColor(Color.black);
    ekraan.drawLine(0, 40, 0, 160); 
    ekraan.drawLine(0, 40, 120, 40);
    ekraan.drawLine(20, 40, 20, 160);
    ekraan.drawLine(0, 60, 120, 60);    
    ekraan.drawLine(40, 40, 40, 160);
    ekraan.drawLine(0, 80, 120, 80);
    ekraan.drawLine(60, 40, 60, 160);
    ekraan.drawLine(0, 100, 120, 100);
    ekraan.drawLine(80, 40, 80, 160);
    ekraan.drawLine(0, 120, 120, 120);
    ekraan.drawLine(100, 40, 100, 160);
    ekraan.drawLine(0, 140, 120, 140);
    ekraan.drawLine(0, 160, 120, 160);
    ekraan.drawLine(120, 40, 120, 160);    
    ekraan.drawLine(0, 160, 120, 160);     
  }
  

  TextField raadius=new TextField("  "),
				summa=new TextField("    ");
  Button nupp=new Button("  Joonista ja arvuta ring  ");
  Label valem=new Label("S=d/2*3.14=");
  public void init(){
    add(raadius);
    add(nupp);
    add(valem);
    add(summa);
    nupp.addActionListener(this);
  }
  
   
  public void actionPerformed(ActionEvent e){
    int nr=Integer.parseInt(raadius.getText().trim());
    Graphics g=this.getGraphics();
    g.setColor(Color.red);
    g.fillOval(1, 41, nr, nr);
    summa.setText((numbriks(raadius)/2)*3.14+"");    
    paint(g);
    }
    
  int numbriks(TextField tf){
    return Integer.parseInt(tf.getText().trim());
  }   
    
}