JAVASwing-generate a Message Box Based on the display resolution

 package SizedFrame;    import java.awt.*;    import javax.swing.*;    public class SizedFrameTest {        public static void main(String[] args) {          // TODO Auto-generated method stub          EventQueue.invokeLater(new Runnable()          {              public void run()              {                  SizedFrame frame = new SizedFrame();                  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);                  frame.setVisible(true);              }          });      }    }  class SizedFrame extends JFrame  {      public SizedFrame()      {          //get screen dimension          Toolkit kit = Toolkit.getDefaultToolkit();          Dimension screenSize = kit.getScreenSize();          int screenHeight = (int) screenSize.getHeight();          int screenWidth = (int) screenSize.getWidth();                    //set frame width,height and location                    setSize(screenWidth/2,screenHeight/2);          setLocationByPlatform(true);                    //set frame icon and title                    Image img = kit.getImage("icon.gif");          setIconImage(img);          setTitle("SizedFrame");                          }  }