Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Graphics;
import java.awt.Panel;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import javax.swing.JFrame;

public class Main extends Panel {
    private BufferedImage images[];

    private int imageIndex = 0;

    public Main(String filename) throws Exception {
        FileInputStream fin = new FileInputStream(filename);
        String suffix = filename.substring(filename.lastIndexOf('.') + 1);
        System.out.println("suf " + suffix);
        Iterator readers = ImageIO.getImageReadersBySuffix(suffix);
        ImageReader imageReader = (ImageReader) readers.next();
        ImageInputStream iis = ImageIO.createImageInputStream(fin);
        imageReader.setInput(iis, false);
        int num = imageReader.getNumImages(true);
        images = new BufferedImage[num];
        for (int i = 0; i < num; ++i) {
            images[i] = imageReader.read(i);
        }
        fin.close();
    }

    public void paint(Graphics g) {
        if (images == null)
            return;
        g.drawImage(images[imageIndex], 0, 0, null);
        imageIndex = (imageIndex + 1) % images.length;
    }

    static public void main(String args[]) throws Exception {
        JFrame frame = new JFrame("ShowImageIR.java");
        Panel panel = new Main(args[0]);
        frame.getContentPane().add(panel);
        frame.setSize(400, 400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}