import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class SudokuBoard extends Applet
{
private Panel options;
private Button easy,medium,hard,solve;
private Panel sudokuGrid;
private TextField[][] grid;

public SudokuBoard()
{
options=new Panel();
easy=new Button("Easy");
medium=new Button("Medium");
hard=new Button("Hard");
solve=new Button("Solve");
solve.setEnabled(false);
easy.addActionListener(new EasyButtonListener());
medium.addActionListener(new MediumButtonListener());
hard.addActionListener(new HardButtonListener());
solve.addActionListener(new SolveButtonListener());
options.add(easy);
options.add(medium);
options.add(hard);
options.add(solve);

sudokuGrid=new Panel();
sudokuGrid.setLayout(new GridLayout(9,9));
grid=new TextField[9][9];
for(int i=0;i<9;i++)
{
for(int j=0;j<9;j++) 
{
grid[i][j]=new TextField(1);
sudokuGrid.add(grid[i][j]);
}
}

add(options,BorderLayout.NORTH);
add(sudokuGrid,BorderLayout.CENTER);
}

public class EasyButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
grid[0][0].setText("1");
grid[0][2].setText("3");
grid[0][3].setText("5");
grid[0][5].setText("8");
grid[0][8].setText("9");
grid[1][2].setText("8");
grid[1][4].setText("4");
grid[1][5].setText("7");
grid[1][6].setText("6");
grid[2][1].setText("4");
grid[2][2].setText("7");
grid[3][0].setText("2");
grid[3][1].setText("7");
grid[3][5].setText("3");
grid[3][6].setText("4");
grid[3][7].setText("9");
grid[4][3].setText("9");
grid[4][5].setText("2");
grid[5][1].setText("5");
grid[5][2].setText("9");
grid[5][3].setText("6");
grid[5][7].setText("2");
grid[5][8].setText("1");
grid[6][6].setText("2");
grid[6][7].setText("7");
grid[7][2].setText("2");
grid[7][3].setText("4");
grid[7][4].setText("9");
grid[7][6].setText("8");
grid[8][0].setText("3");
grid[8][3].setText("7");
grid[8][5].setText("1");
grid[8][6].setText("9");
grid[8][8].setText("4");

solve.setEnabled(true);
}
}

public class MediumButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{


solve.setEnabled(true);
}
}

public class HardButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{


solve.setEnabled(true);
}
}

public class SolveButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
for(int i=0;i<9;i++)
{

}
}
}
}