Program Specification:

You are to finish the following Graphical Mine Sweap program:

You are given the following Complete class MyJButton:

import javax.swing.*;

public class MyJButton extends JButton

{

private static final long serialVersionUID = 2L;

public final int row;

public final int col;

public MyJButton(String text, int row, int col)

{

super(text);

this.row = row;

this.col = col;

}

}

You are also given the following Partial class MineSweapPart:

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class MineSweapPart extends JFrame

{

private static final long serialVersionUID = 1L;

private static final int HEIGHT = 760;

private static final int WIDTH = 760;

private static final int ROWS = 16;

private static final int COLS = 16;

private static final int MINES = 16;

private static int minesLeft = MineSweapPart.MINES;

private static int actualMinesLeft = MineSweapPart.MINES;

private static final String FLAGGED = "@";

private static final String MINE = "M";

// visual indication of an exposed MyJButton

private static final Color expColor = Color.lightGray;

// colors used when displaying the getStateStr() String

private static final Color colorMap[] =

{Color.lightGray, Color.blue, Color.green,

Color.cyan, Color.yellow, Color.orange,

Color.pink, Color.magenta, Color.red, Color.red};

private boolean running = true;

// holds the "number of mines in perimeter" value for each MyJButton

private int[][] sGrid = new int[ROWS][COLS];

public MineSweapPart()

{

this.setTitle("MineSweap " +

MineSweapPart.minesLeft +" Mines left");

this.setSize(WIDTH, HEIGHT);

this.setResizable(false);

this.setLayout(new GridLayout(ROWS, COLS, 0, 0));

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

this.createContents();

// place MINES number of mines in sGrid and adjust all of the "mines in perimeter" values

this.setMines();

this.setVisible(true);

}

public void createContents()

{

for (int br = 0; br < ROWS; ++br)

{

for (int bc = 0; bc < COLS; ++bc)

{

// set sGrid[br][bc] entry to 0 - no mines in its perimeter

sGrid[br][bc] = 0;

// create a MyJButton that will be at location (br, bc) in the GridLayout

MyJButton but = new MyJButton("", br, bc);

// register the event handler with this MyJbutton

but.addActionListener(new MyListener());

// add the MyJButton to the GridLayout collection

this.add(but);

}

}

}

// nested private class

private class MyListener implements ActionListener

{

public void actionPerformed(ActionEvent event)

{

if ( running )

{

// used to detrmine if ctrl or alt key was pressed at the time of mouse action

int mod = event.getModifiers();

MyJButton jb = (MyJButton)event.getSource();

// is the MyJbutton that the mouse action occurred in flagged

boolean flagged = jb.getText().equals(MineSweapPart.FLAGGED);

// is the MyJbutton that the mouse action occurred in already exposed

boolean exposed = jb.getBackground().equals(expColor);

// flag a cell : ctrl + left click

if ( !flagged && !exposed && (mod & ActionEvent.CTRL_MASK) != 0 )

{

jb.setText(MineSweapPart.FLAGGED);

--MineSweapPart.minesLeft;

// if the MyJbutton that the mouse action occurred in is a mine

if ( sGrid[jb.row][jb.col] == 9 )

{

// what else do you need to adjust?

// could the game be over?

}

setTitle("MineSweap " +

MineSweapPart.minesLeft + " Mines left");

}

// un-flag a cell : alt + left click

else if ( flagged && !exposed && (mod & ActionEvent.ALT_MASK) != 0 )

{

jb.setText("");

++MineSweapPart.minesLeft;

// if the MyJbutton that the mouse action occurred in is a mine

if ( sGrid[jb.row][jb.col] == 9 )

{

// what else do you need to adjust?

// could the game be over?

}

setTitle("MineSweap " +

MineSweapPart.minesLeft +" Mines left");

}

// expose a cell : left click

else if ( !flagged && !exposed)

{

exposeCell(jb);

}

}

}

public void exposeCell(MyJButton jb)

{

if ( !running )

return;

// expose this MyJButton

jb.setBackground(expColor);

jb.setForeground(colorMap[sGrid[jb.row][jb.col]]);

jb.setText(getStateStr(jb.row, jb.col));

// if the MyJButton that was just exposed is a mine

if ( sGrid[jb.row][jb.col] == 9 )

{

// what else do you need to adjust?

// could the game be over?

return;

}

// if the MyJButton that was just exposed has no mines in its perimeter

if ( sGrid[jb.row][jb.col] == 0 )

{

// lots of work here - must expose all MyJButtons in its perimeter

// and so on

// and so on

// .

// .

// .

}

}

}

// nested private class

public static void main(String[] args)

{

new MineSweapPart();

}

//************************************************************************************************

// place MINES number of mines in sGrid and adjust all of the "mines in perimeter" values

private void setMines()

{

// your code here ...

}

private String getStateStr(int row, int col)

{

// no mines in this MyJbuttons perimeter

if ( this.sGrid[row][col] == 0 )

return "";

// 1 to 8 mines in this MyJButtons perimeter

else if ( this.sGrid[row][col] > 0 && this.sGrid[row][col] < 9 )

return "" + this.sGrid[row][col];

// this MyJButton in a mine

else

return MineSweapPart.MINE;

}

}