Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Image;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;

public class Main {

    public static void main(String[] args) throws Exception {
        URL url = new URL("http://www.java2s.com/style/download.png");
        Image chunk = readFragment(url.openStream(), new Rectangle(15, 15, 30, 25));
        JOptionPane.showMessageDialog(null, new ImageIcon(chunk), "Duke", JOptionPane.INFORMATION_MESSAGE);

    }

    public static BufferedImage readFragment(InputStream stream, Rectangle rect) throws IOException {
        ImageInputStream imageStream = ImageIO.createImageInputStream(stream);
        ImageReader reader = ImageIO.getImageReaders(imageStream).next();
        ImageReadParam param = reader.getDefaultReadParam();

        param.setSourceRegion(rect);
        reader.setInput(imageStream, true, true);
        BufferedImage image = reader.read(0, param);

        reader.dispose();
        imageStream.close();

        return image;
    }

}