Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.FilteredImageSource;
import java.awt.image.RGBImageFilter;
import java.net.URL;

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

public class Main {
    public static void main(String[] args) throws Exception {
        String mapUrlPath = "http://www.java2s.com/style/download.png";
        URL mapUrl = new URL(mapUrlPath);
        BufferedImage mapImage = ImageIO.read(mapUrl);
        Image newMapImage = Toolkit.getDefaultToolkit()
                .createImage(new FilteredImageSource(mapImage.getSource(), new RedBlueSwapFilter()));
        ImageIcon mapIcon = new ImageIcon(mapImage);
        ImageIcon newMapIcon = new ImageIcon(newMapImage);

        JPanel imagePanel = new JPanel();
        imagePanel.add(new JLabel(mapIcon));
        imagePanel.add(new JLabel(newMapIcon));

        JOptionPane.showMessageDialog(null, imagePanel);
    }
}

class RedBlueSwapFilter extends RGBImageFilter {
    public int filterRGB(int x, int y, int rgb) {
        return ((rgb & 0xff00ff00) | ((rgb & 0xff0000) >> 16) | ((rgb & 0xff) << 16));
    }
}