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

// The Lesson3 class illustrates the difference between init and paint methods.
// It also shows the difference between "instance variables" and "local variables"

public class Lesson3 extends Applet
{
    // Instance variables are declared outside of any method.  They can be used in any
    // of the class methods
   int paintCount = 0;
   TextField paintText = new TextField("Times paint used: " + paintCount);
   int initCount = 0;
   
   // The init method for the Applet class is executed once when the applet is created
   public void init() 
   {
      setBackground(Color.yellow);
      initCount++;
      // initText is a local variable which can only be used within this method.
      TextField initText = new TextField("Times init used: " + initCount);
      add(initText);
      add(paintText);
   }
   
   // The paint method is executed each time the applet needs to be redrawn on the screen.
   public void paint(Graphics g)
   {
      paintCount++;
      paintText.setText("Times paint used: " + paintCount);
   }
}