Object To png

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import javax.imageio.ImageIO;

public class ObjectToImage{
  public static void main(String[] args){
		BufferedImage img = encode(new Polygon(new int[]{1,2,3,4,5,6,5,4,3,2},new int[]{1,1,3,4,5,6,7,8,9,10}, 10));
		
		try {
			ImageIO.write(img, "png", new File("./img.png"));
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		System.out.println((Polygon)decode(img));
	}

	public static byte[] serialize(Object obj) throws IOException {
		ByteArrayOutputStream b = new ByteArrayOutputStream();
		ObjectOutputStream o = new ObjectOutputStream(b);
		o.writeObject(obj);
		return b.toByteArray();
	}

	public static Object deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
		ByteArrayInputStream b = new ByteArrayInputStream(bytes);
		ObjectInputStream o = new ObjectInputStream(b);
		return o.readObject();
	}
	public static BufferedImage encode(Object o){

		byte[] list = null;
		try {
			list = serialize(o);
		} catch (IOException e) {
		}
		BufferedImage img = new BufferedImage((int)Math.sqrt(list.length), (int)Math.sqrt(list.length)+1, BufferedImage.TYPE_INT_ARGB);
		img.setRGB(0, 0, list.length);
		int k = 0;
		out: for(int y = 0; y < img.getHeight(); y++){
			for(int x = 0; x < img.getWidth(); x++){
				if(x == 0 && y == 0)continue;
				img.setRGB(x, y, list[k++]);
				if(k == list.length)break out;
			}
		}
		return img;

	}
	public static Object decode(BufferedImage img){
		byte[] list = new byte[img.getRGB(0,0)];
		int k = 0;
		out: for(int y = 0; y < img.getHeight(); y++){
			for(int x = 0; x < img.getWidth(); x++){
				if(x == 0 && y == 0)continue;
				list[k++] = (byte) img.getRGB(x, y);
				if(k == list.length)break out;
			}
		}
		Object ob = null;
		try {
			ob = deserialize(list);
		} catch (ClassNotFoundException e) {}
		catch (IOException e) {}
		return ob;
	}
}