javax_pixel.java

//java -Djava.awt.headless=true

import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public class Main {

    public static void main(String[] args) throws IOException {
	// write your code here
        BufferedImage img = ImageIO.read(new File("/Users/qkou/Desktop/Dot_Blot.jpg"));
        byte[] pixels = ((DataBufferByte) img.getRaster().getDataBuffer()).getData();
        System.out.println(pixels.length);
    }
}