import java.applet.*;
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;

public class AppTest extends Applet 
{
   //data fields (for convenience only)
   public int xMax; 
   public int yMax;

   //Initializer - This method is automatically ran with applet is loaded!
   //It sorta replaces the constructor.
   
   public void init() 
   {
      xMax = getSize().width-1;
      yMax = getSize().height-1;
   }

   //Paint - This method is automatically ran when the applet has to be repainted.

   public void paint( Graphics g ) 
   {
      //Working with a 2D class will give us extra options.
      Graphics2D g2D = (Graphics2D) g;
      
      //Draw biggest rectangle using lines & points
      Point2D.Double topLeft = new Point2D.Double(0.0, 0.0);
      Point2D.Double topRight = new Point2D.Double(xMax, 0.0);
      Point2D.Double bottomLeft = new Point2D.Double(0.0, yMax);
      Point2D.Double bottomRight = new Point2D.Double(xMax, yMax);
      
      Line2D.Double top = new Line2D.Double(topLeft, topRight);
      Line2D.Double right = new Line2D.Double(topRight, bottomRight);
      Line2D.Double bottom = new Line2D.Double(bottomRight, bottomLeft);
      Line2D.Double left = new Line2D.Double(bottomLeft, topLeft);
      
      g2D.draw(top);
      g2D.draw(right);
      g2D.draw(bottom);
      g2D.draw(left);
      
      //draw X
      Line2D.Double diag1 = new Line2D.Double(topLeft, bottomRight);
      Line2D.Double diag2 = new Line2D.Double(topRight, bottomLeft);
      
      g2D.draw(diag1);
      g2D.draw(diag2);
          
   }
}