Image Processing

how to select a part of image in java programming?
   i want to develop a puzzle game for which i need to break the picture in different parts
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take a look at this example, just use Your own image (jpg, gif)

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import java.awt.image.*;
import javax.imageio.*;

public class P extends JFrame {
  BufferedImage bi = null;
  P() {
  public void init() {
    try {
      bi = File("CATFACE.jpg"));
    } catch(IOException ioe) {
      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))));
  public static void main(String[] args) {
    P p = new P();

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