/* File: Counter02.java

  Same as Counter01, except now we put the code for counting down
  in a private inner class, with a method called run.

*/

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

public class Counter02 {

   // a private inner class
   private class Window1 {

      int start ;

      // start counting down from 10 by default  
      Window1() { start = 10 ; }

      // this constructor lets me specify the starting point
      Window1(int n) { start = n ; }

      void run() {

         try {
            
            // Create a window with Swing
            //
            JFrame frame = new JFrame( "HelloJava" );
            JLabel label = new JLabel("Hello, Java!", JLabel.CENTER );
            label.setFont( new Font("Serif", Font.BOLD, 36) ) ;
            frame.getContentPane().add( label );
            frame.setSize( 300, 300 );
            frame.setVisible( true );
            
            Thread.sleep(1000) ;
     
            for(int i = start ; i >= 0 ; i--) {
               label.setText( Integer.toString(i) ) ;
               Thread.sleep(500) ;
            }
     
            label.setText("Kaboom!") ;
            Thread.sleep(1000) ;
     
         } catch ( InterruptedException e ) {
            System.out.println("Oh look! an exception!") ;
         }
     
      }

   }


   // This is the "real" main program. Static methods cannot
   // invoke non-static methods...
   public void doThis() {
      Window1 w1 = new Window1(13) ;      
      w1.run() ;
      System.out.println("Ok, I'm done.") ;
      System.exit(0) ;
   }



   /// Entry point. Just create an object and call doThis().
   public static void main( String[] args ) {
 
      Counter02 obj = new Counter02() ;
      obj.doThis() ;
   }

}