Help with turning Sudoku into Magic Sudoku

[Murlio]

Hey guys, i've been trying to make my sudoku into magic one, in other words to make so the 3x3 squares to be magic squares. I've been reading in a lot of forums for this but still no sucess. Hope smb will help me. Here is the code i am trying to modify:

import java.util.*;
import java.util.concurrent.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class SuDoKu extends JFrame implements ActionListener, KeyListener, Runnable{
 
	public static void main(String args[]){
		SuDoKu app = new SuDoKu();
		app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		app.setSize(470, 520);
		app.setResizable(false);
		app.setVisible(true);
	}
	int name1,name2;
	int time;
	Random r = new Random();
 
	private JTextField grid [][] = new JTextField [9][9];
	private JButton solveButton = new JButton("Solve");
	private JButton clearButton = new JButton("Clear");
	private JButton resetButton = new JButton("Reset");
	private JLabel guesses = new JLabel("Guesses: 0");
	private int guess = 0;
	private JPanel textPanel = new JPanel();
	private JPanel buttonPanel = new JPanel();
	private boolean running = false;
	private Thread t;
	private int id1, id2;
 
	public SuDoKu(){
		textPanel.setLayout(new GridBagLayout());
		GridBagConstraints c = new GridBagConstraints();
		int sepx, sepy = 0;
 
		for (int l = 0; l < 9; l++){
			sepx = 0;
			c.gridy = l+sepy;
 
			for (int k = 0; k < 9; k++){
				grid[l][k] = new JTextField("", 1);
				grid[l][k].addKeyListener(this);
				grid[l][k].setFont(new Font("Arial", Font.BOLD, 50));
				grid[l][k].setHorizontalAlignment(JTextField.CENTER);
				grid[l][k].setPreferredSize(new Dimension(50, 50));
				grid[l][k].setMinimumSize(new Dimension(50, 50));
				c.gridx = k+sepx;
				textPanel.add(grid[l][k], c);
 
				if (k % 3 == 2 && k != 8){
					JSeparator separx = new JSeparator(SwingConstants.VERTICAL);
					separx.setForeground(Color.BLACK);
					separx.setPreferredSize(new Dimension(1, 50));
					sepx++;
					c.gridx = k+sepx;
					textPanel.add(separx, c);
				}
			}
			if (l % 3 == 2 && l != 8){
				sepy++;
 
				for (int z = 0; z < 11; z++){
 
					if (z % 4 != 3){
						JSeparator separy = new JSeparator(SwingConstants.HORIZONTAL);
						separy.setForeground(Color.BLACK);
						separy.setPreferredSize(new Dimension(50, 1));
						c.gridy = l+sepy;
						c.gridx = z;
						textPanel.add(separy, c);
					}
				}
			}
		}
		buttonPanel.setLayout(new GridLayout(1, 5, 5, 0));
 
		resetButton.addActionListener(this);
		buttonPanel.add(resetButton);
 
		clearButton.addActionListener(this);
		buttonPanel.add(clearButton);
 
		solveButton.addActionListener(this);
		buttonPanel.add(solveButton);
 
		buttonPanel.add(guesses);
 
		getContentPane().add(textPanel, BorderLayout.CENTER);
		getContentPane().add(buttonPanel, BorderLayout.SOUTH);
	}
 
	public void actionPerformed(ActionEvent event){
		try{
			if (event.getSource() == solveButton && !running){
 
				t = new Thread(this);
				t.start();
			}
			else if (event.getSource() == clearButton && !running)
			clear();
			else if (event.getSource() == clearButton && running)
			end();
			else if (event.getSource() == resetButton && !running)
			reset();
		}
		catch (Exception ex){
 
			JOptionPane.showMessageDialog(this, ex, "Error", JOptionPane.ERROR_MESSAGE);
			System.err.print(ex);
			end();
			reset();
		}
	}
 
	public void keyTyped(KeyEvent e){
 
		if (((JTextField)e.getSource()).getText().length() > 1)
			((JTextField)e.getSource()).setText(Character.toString(((JTextField)e.getSource()).getText().charAt(1)));
		else if (((JTextField)e.getSource()).getText().length() == 0)
			((JTextField)e.getSource()).setBackground(Color.WHITE);
	}
 
	public void keyPressed(KeyEvent e){
 
		keyTyped(e);
	}
 
	public void keyReleased(KeyEvent e){
 
		keyTyped(e);
	}
 
	public void paint(Graphics g){
 
		super.paint(g);
	}
 
	public SuDoKu(int id1, int id2){
		this.id1 = id1;
		this.id2 = id2;
		name1=id1;
		name2=id2;
		time = r.nextInt(50);
	}
 
	public void run(){
		System.out.println("Starting: " +id1 +id2);
		try{
			System.out.printf("%d%d is sleeping for %d\n", name1, name2, time);
			Thread.sleep(time);
			System.out.printf("%d%d is completed\n", name1, name2);
		}
		catch(InterruptedException e){
 
		}
 
		running = true;
		clearButton.setText("Stop");
		guess = 0;
		if (!solve(0,0))
			JOptionPane.showMessageDialog(this, "Impossible", "Impossible", JOptionPane.ERROR_MESSAGE);
		end();
	}
 
	private void end(){
 
		running = false;
		clearButton.setText("Clear");
		guesses.setText("Guesses: " + guess);
		System.gc();
		t.yield();
	}
 
 
	private void clear(){
 
		guess = 0;
		guesses.setText("Guesses: " + guess);
		ExecutorService executor = Executors.newFixedThreadPool(9);
		for (int i = 0; i < 9; i++)
			for (int j = 0; j < 9; j++){
				executor.submit(new SuDoKu(i,j));
				grid[i][j].setText("");
				grid[i][j].setBackground(Color.WHITE);
			}
		executor.shutdown();
		System.out.println("All tasks are submited");
 
		try {
			//1 day wait till task is finished
			executor.awaitTermination(1, TimeUnit.DAYS);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		System.out.println("All tasks are completed");
	}
 
	private void reset(){
 
		guess = 0;
		guesses.setText("Guesses: " + guess);
		ExecutorService executor = Executors.newFixedThreadPool(9);
		for (int i = 0; i < 9; i++)
			for (int j = 0; j < 9; j++){
				executor.submit(new SuDoKu(i,j));
				if (grid[i][j].getBackground() == Color.GREEN){
 
					grid[i][j].setText("");
					grid[i][j].setBackground(Color.WHITE);
				}
			}
		executor.shutdown();
		System.out.println("All tasks are submited");
 
		try {
			//1 day wait till task is finished
			executor.awaitTermination(1, TimeUnit.DAYS);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		System.out.println("All tasks are completed");
	}
 
	private boolean solve(int i, int j){
		ExecutorService executor = Executors.newFixedThreadPool(9);
		if (j == 9){
 
			j = 0;
			i++;
		}
		if (i == 9)
			return true;
 
		if (!grid[i][j].getText().equals(""))
			return solve(i, j+1);
 
		if (!running)
			return false;
		executor.submit(new SuDoKu(i,j));
		grid[i][j].setBackground(Color.GREEN);
		executor.shutdown();
		System.out.println("All tasks are submited");
 
		try {
			//1 day wait till task is finished
			executor.awaitTermination(1, TimeUnit.DAYS);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		System.out.println("All tasks are completed");
 
		ArrayList<Integer> possibles = new ArrayList<Integer> ();
		for (int k = 0; k < 9; k++)
			possibles.add(k + 1);
 
 
		/*Row Check*/
		for (int j2 = -j; j2 + j < 9; j2++)
			if (!grid[i][j2 + j].getText().equals(""))
				for (int k = 0; k < possibles.size(); k++)
					if (possibles.get(k) == Integer.parseInt(grid[i][j2 + j].getText()))
						possibles.remove(k);
 
		/*Column Check*/
		for (int i2 = -i; i2 + i < 9; i2++)
			if (!grid[i + i2][j].getText().equals(""))
				for (int k = 0; k < possibles.size(); k++)
					if (possibles.get(k) == Integer.parseInt(grid[i + i2][j].getText()))
						possibles.remove(k);
 
		/*Square Check*/
		for (int i2 = -(i % 3); i2 + i < ((i / 3) + 1) * 3; i2++)
			for (int j2 = -(j % 3); j2 + j < ((j / 3) + 1) * 3; j2++)
				if (!grid[i + i2][j + j2].getText().equals(""))
					for (int k = 0; k < possibles.size(); k++)
						if (possibles.get(k) == Integer.parseInt(grid[i + i2][j + j2].getText()))
							possibles.remove(k);
		int test = -1;
		do{
 
			test++;
			if (test == possibles.size()){
 
				grid[i][j].setText("");
				grid[i][j].setBackground(Color.WHITE);
				return false;
			}
			guess++;
			guesses.setText("Guesses: " + guess);
			grid[i][j].setText(Integer.toString(possibles.get(test)));
 
		}while (!solve(i, j+1));
 
		return true;
	}
 
}

[jps]

Hi and welcome Murlio.

Please read: This Forum is for Saying Hi, not for Asking Technical Questions (READ BEFORE POSTING)
Please see the announcements page for the use of code tags when posting code, as well as other helpful forum tips.

I for one have no idea what a magic square is. If you need help, ask some kind of question or post far more details about what the code actually does, and be very descriptive as to what you want to change. Don't forget code tags and any error messages you may be getting.

Thread moved from member introductions