How can I create splash window in Swing?

Sep 30

java, swing Add comments

Use a JWindow to display your splash image, the following example shows how to do add some nice effects to your splash image.


import java.awt.AWTException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.util.Arrays;

import javax.imageio.ImageIO;
import javax.swing.JWindow;
import javax.swing.Timer;

public class SplashWindow extends JWindow
{
    private BufferedImage splash = null;

    public SplashWindow(BufferedImage image)
    {
        int width = image.getWidth();
        int height = image.getHeight();
        int extra = 14;

        setSize(new Dimension(
             width + extra, height + extra));
        setLocationRelativeTo(null);
        Rectangle windowRect = getBounds();

        splash = new BufferedImage(
            width + extra, height + extra,
            BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = (Graphics2D) splash.getGraphics();

        try
        {
          Robot robot = new Robot(
              getGraphicsConfiguration().getDevice());
          BufferedImage capture = robot.createScreenCapture(
              new Rectangle(windowRect.x, windowRect.y,
                 windowRect.width + extra,
                 windowRect.height + extra));
          g2.drawImage(capture, null, 0, 0);
        }
        catch (AWTException ex)
        {
          ex.printStackTrace();
        }

        BufferedImage shadow = new BufferedImage(
           width + extra, height + extra,
           BufferedImage.TYPE_INT_ARGB);
        Graphics shadowGraphics = shadow.getGraphics();
        shadowGraphics.setColor(
            new Color(0.0f, 0.0f, 0.0f, 0.3f));
        shadowGraphics.fillRoundRect(
            6, 6, width, height, 12, 12);
        shadowGraphics.dispose();

        float[] data = new float[49];
        Arrays.fill(data, 1 / (float) (49));
        g2.drawImage(shadow,
             new ConvolveOp(new Kernel(7, 7, data)),
                0, 0);
        g2.drawImage(image, 0, 0, this);
        g2.dispose();
    }

    public void paint(Graphics g)
    {
        if (splash != null)
        {
            g.drawImage(splash, 0, 0, null);
        }
    }

    public static void main(String[] args)
       throws Exception
    {
        BufferedImage image = ImageIO.read(
            SplashWindow.class.getResourceAsStream(
                "objects.png"));
        SplashWindow window = new SplashWindow(image);
        window.setVisible(true);
        Timer timer = new Timer(5000, new ActionListener()
        {
            public void actionPerformed(ActionEvent event)
            {
                System.exit(0);
            }
        });
        timer.start();
    }
}