FWD » Core Development » User Interface

package test;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.io.File;

import java.io.IOException;

import javax.imageio.ImageIO;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.SwingUtilities;

public class SetImageIconTest

{

   public static void main(String[] args)

   {

      SwingUtilities.invokeLater(new Runnable()

      {

         public void run()

         {

            final JFrame frame = new JFrame("Test setIconImage");

            frame.setSize(800, 600);

            frame.setLocation(150, 150);

            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            //frame.setUndecorated(true);

            final boolean[] changeIcon = new boolean[] { true };

            frame.setContentPane(new JComponent()

            {

               public void paint(Graphics g)

               {

                  if (changeIcon[0])

                  {

                     frame.setVisible(false);

                     new Thread(new Runnable()

                     {

                        @Override

                        public void run()

                        {

                           changeIcon[0] = false;

                           try

                           {

                              frame.setIconImage(ImageIO.read(new File("./gclogo.ico")));

                           }

                           catch (IOException e)

                           {

                              e.printStackTrace();

                           }

                           SwingUtilities.invokeLater(new Runnable()

                           {

                              @Override

                              public void run()

                              {

                                 frame.setVisible(true);

                                 //((sun.awt.SunToolkit)Toolkit.getDefaultToolkit()).realSync();

                              }

                           });

                        }

                     }).start();

                  }

                  Graphics2D g2 = (Graphics2D) g;

                  g2.setBackground(Color.white);

                  g2.clearRect(0, 0, 800, 600);

               }

            });

            frame.setVisible(true);

         }

      });

   }

}