//  HelloSwingApplet.java  (c) 2006 Kari Laitinen

//  http://www.naturalprogramming.com/

//  2006-01-21  File created.
//  2006-09-28  Latest modification.

//  This prorgram is a 'swing' version of HelloApplet.java
//  This means that swing classes like JPanel and JApplet are
//  in use. Swing classes represent newer Java technology and thus
//  they should be favored in Java programming. When swing classes are
//  in use, Java programs should always provide the same Graphical User
//  Interface (GUI) regardless of the environment (Windows, UNIX, Linux,
//  Macintosh, etc.) in which the programs are executed.

//  See the notes at the end of this file.

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

class HelloPanel extends JPanel
{
   public void paintComponent( Graphics graphics )
   {
      //  The superclass version of paintComponent() clears the
      //  component area and does other necessary things.

      super.paintComponent( graphics ) ;

      graphics.drawString( "Hello. I am a Java applet.", 80, 100 ) ;

      graphics.drawString( "The coordinates of this line are (80,150).",
                           80, 150 ) ;
   }
}


public class HelloSwingApplet extends JApplet
{
   public void init()
   {
      Container  content_pane_of_this_applet  =  getContentPane() ;

      HelloPanel main_panel_of_this_applet  =  new  HelloPanel() ;

      content_pane_of_this_applet.add( main_panel_of_this_applet ) ;
 
   }
}


/*  NOTES:

   //  The above init() method can alternatively be written in the
   //  following way:

   public void init()
   {
      getContentPane().add( new HelloPanel() ) ; 
   }
*/

//  If you compare the program above to HelloApplet.java, you
//  may think that swing applets are complicated programs
//  when compared to traditional Java applets.

//  The above program is constructed so that a panel object is
//  made to represent the contents of the applet. It is not absolutely
//  necessary to write swing applets in this way. A less complicated 
//  version of the above program would be the following.

/*

public class HelloSwingApplet extends JApplet
{
   public void paint( Graphics graphics )
   {
      super.paint( graphics ) ;

      graphics.drawString( "Hello. I am a Java applet.", 80, 100 ) ;

      graphics.drawString( "The coordinates of this line are (80,150).",
                           80, 150 ) ;
   }
}

*/