import javax.swing.*; // Needed for Swing classes

/**
   This class defines a GUI window and has it's own
   main method.
*/

public class EmbeddedMain extends JFrame
{
   final int WINDOW_WIDTH = 220;  // Window width in pixels
   final int WINDOW_HEIGHT = 70;  // Window height in pixels   
   
   /**
      Constructor
   */
  
   public EmbeddedMain()
   {
      // Set this window's title.
      setTitle("A Simple Window");

      // Set the size of this window.
      setSize(WINDOW_WIDTH, WINDOW_HEIGHT);

      // Specify an action for the close button.
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      // Create a label to display a message.
      JLabel messageLabel =
            new JLabel("This class has it's own main method.");
      
      // Add the label to the content pane.
      add(messageLabel);

      // Display the window.
      setVisible(true);
   }
   
   /**
      The main method creates an instance of the EmbeddedMain
      class, which causes it to display its window.
   */

   public static void main(String[] args)
   {
      EmbeddedMain em = new EmbeddedMain();
   }
}