  1  import javax.swing.*;

  3  public class IconTester

  4  {

  5     public static void main(String[] args)

  6     {

  7        JOptionPane.showMessageDialog(

  8              null,

  9              "Hello, Mars!",

 10              "Message",

 11              JOptionPane.INFORMATION_MESSAGE,

 12              new MarsIcon(50));

 13        System.exit(0);

 14     }

 15  }