Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;

public class Main {

    public static BufferedImage getTransparentImage(BufferedImage image, Color transparent) {
        BufferedImage img = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = img.createGraphics();
        for (int x = 0; x < img.getWidth(); x++) {
            for (int y = 0; y < img.getHeight(); y++) {
                if (image.getRGB(x, y) != transparent.getRGB()) {
                    img.setRGB(x, y, image.getRGB(x, y));
                }
            }
        }
        g.dispose();
        return img;
    }

    public static void main(String[] args) throws Exception {
        URL url = new URL("http://www.java2s.com/style/download.png");
        final BufferedImage trans = getTransparentImage(ImageIO.read(url), Color.BLACK);
        Runnable r = new Runnable() {
            @Override
            public void run() {
                JLabel gui = new JLabel(new ImageIcon(trans));
                JOptionPane.showMessageDialog(null, gui);
            }
        };
        SwingUtilities.invokeLater(r);
    }
}