import javax.swing.*;
import java.awt.*;
public class AboutPopup extends JFrame {
   public AboutPopup() {
      super("About");
      String message = "\n";
      message+="This image of Earth’s city lights was created with data ";
      message+="from the Defense Meteorological Satellite Program ";
      message+="(DMSP) Operational Linescan System (OLS). ";
      message+="Originally designed to view clouds by moonlight, ";
      message+="the OLS is also used to map the locations of permanent ";
      message+="lights on the Earth’s surface.\n\n";
      message+="The image has been modified by Ashley Mills to only include ";
      message+="the UK, the original image and further description can be ";
      message+="found at:\n\n";
      message+="http://visibleearth.nasa.gov/cgi-bin/viewrecord?5826\n\n";
      message+="This is also where the description was taken from.";
      setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
      setSize(new Dimension(315,294));
      JTextPane messagePane = new JTextPane();
      messagePane.setBackground(Color.BLACK);
      messagePane.setForeground(Color.GRAY);
      messagePane.setEditable(false);
      messagePane.setText(message);
      getContentPane().add(messagePane);
      setResizable(false);
      setVisible(true);
   }
}