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

/**
   This program displays a simple window with a title. The
   application exits when the user clicks the close button.
*/

public class ShowWindow
{
   public static void main(String[] args)
   {
      final int WINDOW_WIDTH = 350;   // Window width in pixels
      final int WINDOW_HEIGHT = 250;  // Window height in pixels

      // Create a window.
      JFrame window = new JFrame();
      
      // Set the title.
      window.setTitle("A Simple Window");

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

      // Specify what happens when the close button is clicked.
      window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      // Display the window.
      window.setVisible(true);
   }
}