Create a 10x10 Minesweeper Game in Java

Objective:
Create a graphical game of minesweeper IN JAVA. The board should consist of 10x10 buttons.
Of the 100 spaces there should be at least 20 randomly placed mines. If the button is clicked and
it is not a mine then it clears itself. If a space has been cleared then it should indicate how many
of its eight neighbors are mines. If a space is clicked and it is a mine then the game is over and
the player is asked if they want to play again. Finally, if all the non-mine spaces have been
clicked then the player is prompted that they won.
Solution
2 files need to be made.
First Game.Java which will have the gaming logic and User Interface and Main.Java which will
have have the main method and object of Game.java Number of rows and cols is customizable so
user can change that as and when needed.
import java.awt.*;
import java.awt.Dimension;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class Game extends JFrame implements ActionListener, ContainerListener {
int fw, fh, blockr, blockc, var1, var2, num_of_mine, detectedmine = 0, savedlevel = 1,
savedblockr, savedblockc, savednum_of_mine = 10;
int[] r = {-1, -1, -1, 0, 1, 1, 1, 0};
int[] c = {-1, 0, 1, 1, 1, 0, -1, -1};
JButton[][] blocks;
int[][] countmine;
int[][] colour;
ImageIcon[] ic = new ImageIcon[14];
JPanel panelb = new JPanel();
JPanel panelmt = new JPanel();
JTextField tf_mine, tf_time;
JButton reset = new JButton("");
Random ranr = new Random();
Random ranc = new Random();
boolean check = true, starttime = false;

Point framelocation;
Stopwatch sw;
MouseHendeler mh;
Point p;
Game() {
super("Game");
setLocation(400, 300);
setic();
setpanel(1, 0, 0, 0);
setmanue();
sw = new Stopwatch();
reset.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
try {
sw.stop();
setpanel(savedlevel, savedblockr, savedblockc, savednum_of_mine);
} catch (Exception ex) {
setpanel(savedlevel, savedblockr, savedblockc, savednum_of_mine);
}
reset();
}
});
setDefaultCloseOperation(EXIT_ON_CLOSE);
show();
}
public void reset() {
check = true;
starttime = false;
for (int i = 0; i < blockr; i++) {
for (int j = 0; j < blockc; j++) {
colour[i][j] = 'w';
}
}
}
public void setpanel(int level, int setr, int setc, int setm) {
if (level == 1) {

fw = 200;
fh = 300;
blockr = 10;
blockc = 10;
num_of_mine = 10;
} else if (level == 2) {
fw = 320;
fh = 416;
blockr = 16;
blockc = 16;
num_of_mine = 70;
fw = 400;
fh = 520;
blockr = 20;
blockc = 20;
num_of_mine = 150;
fw = (20 * setc);
fh = (24 * setr);
blockr = setr;
blockc = setc;
num_of_mine = setm;
}
savedblockr = blockr;
savedblockc = blockc;
savednum_of_mine = num_of_mine;
setSize(fw, fh);
setResizable(false);
detectedmine = num_of_mine;
p = this.getLocation();
blocks = new JButton[blockr][blockc];
countmine = new int[blockr][blockc];
colour = new int[blockr][blockc];
mh = new MouseHendeler();
getContentPane().removeAll();

panelb.removeAll();
tf_mine = new JTextField("" + num_of_mine, 3);
tf_mine.setEditable(false);
tf_mine.setFont(new Font("DigtalFont.TTF", Font.BOLD, 25));
tf_mine.setBackground(Color.BLACK);
tf_mine.setForeground(Color.RED);
tf_mine.setBorder(BorderFactory.createLoweredBevelBorder());
tf_time = new JTextField("000", 3);
tf_time.setEditable(false);
tf_time.setFont(new Font("DigtalFont.TTF", Font.BOLD, 25));
tf_time.setBackground(Color.BLACK);
tf_time.setForeground(Color.RED);
tf_time.setBorder(BorderFactory.createLoweredBevelBorder());
reset.setIcon(ic[11]);
reset.setBorder(BorderFactory.createLoweredBevelBorder());
panelmt.removeAll();
panelmt.setLayout(new BorderLayout());
panelmt.add(tf_mine, BorderLayout.WEST);
panelmt.add(reset, BorderLayout.CENTER);
panelmt.add(tf_time, BorderLayout.EAST);
panelmt.setBorder(BorderFactory.createLoweredBevelBorder());
panelb.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createEmptyBorde
r(10, 10, 10, 10), BorderFactory.createLoweredBevelBorder()));
panelb.setPreferredSize(new Dimension(fw, fh));
panelb.setLayout(new GridLayout(0, blockc));
panelb.addContainerListener(this);
blocks[i][j] = new JButton("");
//blocks[i][j].addActionListener(this);
blocks[i][j].addMouseListener(mh);
panelb.add(blocks[i][j]);
}
}
reset();
panelb.revalidate();

panelb.repaint();
//getcontentpane().setOpaque(true);
getContentPane().setLayout(new BorderLayout());
getContentPane().addContainerListener(this);
//getContentPane().revalidate();
getContentPane().repaint();
getContentPane().add(panelb, BorderLayout.CENTER);
getContentPane().add(panelmt, BorderLayout.NORTH);
setVisible(true);
}
public void setmanue() {
JMenuBar bar = new JMenuBar();
JMenu game = new JMenu("GAME");
JMenuItem menuitem = new JMenuItem("new game");
final JCheckBoxMenuItem beginner = new JCheckBoxMenuItem("Begineer");
final JCheckBoxMenuItem intermediate = new JCheckBoxMenuItem("Intermediate");
final JCheckBoxMenuItem expart = new JCheckBoxMenuItem("Expart");
final JCheckBoxMenuItem custom = new JCheckBoxMenuItem("Custom");
final JMenuItem exit = new JMenuItem("Exit");
final JMenu help = new JMenu("Help");
final JMenuItem helpitem = new JMenuItem("Help");
ButtonGroup status = new ButtonGroup();
menuitem.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
//panelb.removeAll();
//reset();
setpanel(1, 0, 0, 0);
//panelb.revalidate();
//panelb.repaint();
}
});
beginner.addActionListener(
panelb.removeAll();

reset();
setpanel(1, 0, 0, 0);
panelb.repaint();
beginner.setSelected(true);
savedlevel = 1;
}
});
intermediate.addActionListener(
panelb.removeAll();
reset();
setpanel(2, 0, 0, 0);
panelb.repaint();
intermediate.setSelected(true);
savedlevel = 2;
}
});
expart.addActionListener(
panelb.removeAll();
reset();
setpanel(3, 0, 0, 0);
panelb.repaint();
expart.setSelected(true);
savedlevel = 3;
}
});
custom.addActionListener(
//panelb.removeAll();

Customizetion cus = new Customizetion();
reset();
panelb.repaint();
//Game ob=new Game(4);
custom.setSelected(true);
savedlevel = 4;
}
});
exit.addActionListener(new ActionListener() {
System.exit(0);
}
});
helpitem.addActionListener(new ActionListener() {
JOptionPane.showMessageDialog(null, "instruction");
}
});
setJMenuBar(bar);
status.add(beginner);
status.add(intermediate);
status.add(expart);
status.add(custom);
game.add(menuitem);
game.addSeparator();
game.add(beginner);
game.add(intermediate);
game.add(expart);
game.add(custom);
game.addSeparator();
game.add(exit);
help.add(helpitem);
bar.add(game);
bar.add(help);
}

public void componentAdded(ContainerEvent ce) {
}
public void componentRemoved(ContainerEvent ce) {
}
public void actionPerformed(ActionEvent ae) {
}
class MouseHendeler extends MouseAdapter {
public void mouseClicked(MouseEvent me) {
if (check == true) {
if (me.getSource() == blocks[i][j]) {
var1 = i;
var2 = j;
i = blockr;
break;
}
}
}
setmine();
calculation();
check = false;
}
showvalue(me);
winner();
if (starttime == false) {
sw.Start();
starttime = true;
}
}
}
public void winner() {
int q = 0;
for (int k = 0; k < blockr; k++) {
for (int l = 0; l < blockc; l++) {
if (colour[k][l] == 'w') {

q = 1;
}
}
}
if (q == 0) {
//panelb.hide();
blocks[k][l].removeMouseListener(mh);
}
}
sw.stop();
JOptionPane.showMessageDialog(this, "u R a lover");
}
}
public void showvalue(MouseEvent e) {
if (e.getSource() == blocks[i][j]) {
if (e.isMetaDown() == false) {
if (blocks[i][j].getIcon() == ic[10]) {
if (detectedmine < num_of_mine) {
detectedmine++;
}
tf_mine.setText("" + detectedmine);
}
if (countmine[i][j] == -1) {
if (countmine[k][l] == -1) {
//blocks[k][l].setText("X");
blocks[k][l].setIcon(ic[9]);
//blocks[k][l].setBackground(Color.BLUE);
//blocks[k][l].setFont(new Font("",Font.CENTER_BASELINE,8));
}

}
}
sw.stop();
reset.setIcon(ic[12]);
JOptionPane.showMessageDialog(null, "sorry u R loser");
} else if (countmine[i][j] == 0) {
dfs(i, j);
} else {
blocks[i][j].setIcon(ic[countmine[i][j]]);
//blocks[i][j].setText(""+countmine[i][j]);
//blocks[i][j].setBackground(Color.pink);
//blocks[i][j].setFont(new Font("",Font.PLAIN,8));
colour[i][j] = 'b';
//blocks[i][j].setBackground(Color.pink);
break;
}
} else {
if (detectedmine != 0) {
if (blocks[i][j].getIcon() == null) {
detectedmine--;
blocks[i][j].setIcon(ic[10]);
}
tf_mine.setText("" + detectedmine);
}
}
}
}
}
}
public void calculation() {
int row, column;
int value = 0;
int R, C;

row = i;
column = j;
if (countmine[row][column] != -1) {
for (int k = 0; k < 8; k++) {
R = row + r[k];
C = column + c[k];
if (R >= 0 && C >= 0 && R < blockr && C < blockc) {
if (countmine[R][C] == -1) {
value++;
}
}
}
countmine[row][column] = value;
}
}
}
}
public void dfs(int row, int col) {
int R, C;
colour[row][col] = 'b';
blocks[row][col].setBackground(Color.GRAY);
blocks[row][col].setIcon(ic[countmine[row][col]]);
//blocks[row][col].setText("");
for (int i = 0; i < 8; i++) {
R = row + r[i];
C = col + c[i];
if (R >= 0 && R < blockr && C >= 0 && C < blockc && colour[R][C] == 'w') {
if (countmine[R][C] == 0) {
dfs(R, C);
} else {
blocks[R][C].setIcon(ic[countmine[R][C]]);
//blocks[R][C].setText(""+countmine[R][C]);
//blocks[R][C].setBackground(Color.pink);
//blocks[R][C].setFont(new Font("",Font.BOLD,));
colour[R][C] = 'b';
}

}
}
}
public void setmine() {
int row = 0, col = 0;
Boolean[][] flag = new Boolean[blockr][blockc];
flag[i][j] = true;
countmine[i][j] = 0;
}
}
flag[var1][var2] = false;
colour[var1][var2] = 'b';
for (int i = 0; i < num_of_mine; i++) {
row = ranr.nextInt(blockr);
col = ranc.nextInt(blockc);
if (flag[row][col] == true) {
countmine[row][col] = -1;
colour[row][col] = 'b';
flag[row][col] = false;
} else {
i--;
}
}
}
public void setic() {
String name;
for (int i = 0; i <= 8; i++) {
name = i + ".gif";
ic[i] = new ImageIcon(name);
}
ic[9] = new ImageIcon("mine.gif");
ic[10] = new ImageIcon("flag.gif");
ic[11] = new ImageIcon("new game.gif");
ic[12] = new ImageIcon("crape.gif");

}
public class Stopwatch extends JFrame implements Runnable {
long startTime;
//final static java.text.SimpleDateFormat timerFormat = new
java.text.SimpleDateFormat("mm : ss :SSS");
//final JButton startStopButton= new JButton("Start/stop");
Thread updater;
boolean isRunning = false;
long a = 0;
Runnable displayUpdater = new Runnable() {
public void run() {
displayElapsedTime(a);
a++;
}
};
public void stop() {
long elapsed = a;
isRunning = false;
try {
updater.join();
} catch (InterruptedException ie) {
}
displayElapsedTime(elapsed);
a = 0;
}
private void displayElapsedTime(long elapsedTime) {
if (elapsedTime >= 0 && elapsedTime < 9) {
tf_time.setText("00" + elapsedTime);
} else if (elapsedTime > 9 && elapsedTime < 99) {
tf_time.setText("0" + elapsedTime);
} else if (elapsedTime > 99 && elapsedTime < 999) {
tf_time.setText("" + elapsedTime);
}
}
public void run() {
try {

while (isRunning) {
SwingUtilities.invokeAndWait(displayUpdater);
Thread.sleep(1000);
}
} catch (java.lang.reflect.InvocationTargetException ite) {
ite.printStackTrace(System.err);
} catch (InterruptedException ie) {
}
}
public void Start() {
startTime = System.currentTimeMillis();
isRunning = true;
updater = new Thread(this);
updater.start();
}
}
class Customizetion extends JFrame implements ActionListener {
JTextField t1, t2, t3;
JLabel lb1, lb2, lb3;
JButton b1, b2;
int cr, cc, cm, actionc = 0;
Customizetion() {
super("CUSTOMIZETION");
setSize(180, 200);
setResizable(false);
setLocation(p);
t1 = new JTextField();
b1 = new JButton("OK");
b2 = new JButton("Cencel");
b1.addActionListener(this);
b2.addActionListener(this);
lb1 = new JLabel("Row");
lb2 = new JLabel("Column");
lb3 = new JLabel("mine");

getContentPane().setLayout(new GridLayout(0, 2));
getContentPane().add(lb1);
getContentPane().add(t1);
getContentPane().add(b1);
getContentPane().add(b2);
show();
}
if (e.getSource() == b1) {
try {
cr = Integer.parseInt(t1.getText());
cc = Integer.parseInt(t2.getText());
cm = Integer.parseInt(t3.getText());
//Game ms=new Game();
setpanel(4, row(), column(), mine());
dispose();
} catch (Exception any) {
JOptionPane.showMessageDialog(this, "Wrong");
t1.setText("");
t2.setText("");
t3.setText("");
}
//Show_rcm();
}
if (e.getSource() == b2) {
dispose();
}
}
public int row() {
if (cr > 30) {
return 30;
} else if (cr < 10) {

return 10;
} else {
return cr;
}
}
public int column() {
if (cc > 30) {
return 30;
} else if (cc < 10) {
return 10;
} else {
return cc;
}
}
public int mine() {
if (cm > ((row() - 1) * (column() - 1))) {
return ((row() - 1) * (column() - 1));
} else if (cm < 10) {
return 10;
} else {
return cm;
}
}
}
}

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