Save contents of image icon.

Hi All,
I have a jpg image that has been cut up into 16 pieces. I need help to
save each of the pieces.

Any help is appreciated.

TIA

bH

import java.awt.*;
import java.io.*;
import javax.swing.*;
import java.awt.image.*;
import javax.imageio.*;

    public class DiceImage extends JFrame {
      BufferedImage bi = null;
        DiceImage() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
      public void init() {
        try {
          bi = ImageIO.read(new File("images/ImageToDice.jpg"));
        } catch(IOException ioe) {
          ioe.printStackTrace();
          throw new RuntimeException(ioe);
        }
        setLayout(new FlowLayout());
           if(bi != null) {
          for(int i = 0; i < 4; i++)
            for(int j = 0; j < 4; j++) {
              add(new JLabel(new
ImageIcon(bi.getSubimage(i*bi.getWidth()/4, j*bi.getHeight()/4,
bi.getWidth()/4,

bi.getHeight()/4))));
            }
            }
          pack();
        }

      public static void main(String[] args) {
        DiceImage diceImage = new DiceImage();
        diceImage.init();
        diceImage.setVisible(true);
      }
    }