I have worked for hours on this code and finally gotten ver close to completion. I will be adding a Mine Counter and a timer once I figure out how to add the ability to flag mines with right clicking. I learned that JButtons do not recognize right clicks, so I must use a MouseEvent. From there, I'm lost. Can someone give me a nudge in the right direction?
This is what I currently have:
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
public class MineSweeper implements ActionListener {
JFrame frame = new JFrame("Mine Sweeper");
JButton reset = new JButton("Reset");
JButton[][] buttons = new JButton[20][20];//button array
JButton[] flags = new JButton[20];
int[][] counts = new int[20][20];
Container grid = new Container(); //grid for buttons
int MineNum = 50;//number of mines
final int MINE = 10;//int value to identify a mine
public MineSweeper() {
frame.setSize(500, 500);
frame.setLayout(new BorderLayout());
frame.add(reset, BorderLayout.NORTH);
reset.addActionListener(this);
//Grid of Buttons
grid.setLayout(new GridLayout(20,20));
for (int a = 0; a<buttons.length; a++) {
for (int b = 0; b < buttons[0].length; b++) {
buttons[a][b] = new JButton("▒");
buttons[a][b].addActionListener(this);
buttons[a][b].addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON3) {
mineFlagger(true);
}
}
});
grid.add(buttons[a][b]);
}
}
frame.add(grid, BorderLayout.CENTER);
makeRandomMines();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public void mineFlagger (boolean flag){
for (int i = 0; i < buttons.length; i++) {
for (int j = 0; j < buttons[0].length; j++) {
if(flag == true) {
buttons[i][j].setText("F");
}
}
}
}
public static void main(String[] args) {
new MineSweeper();
}
public void makeRandomMines() {
//initializes list of random pairs
ArrayList<Integer> list = new ArrayList<Integer>();
for (int x = 0; x < counts.length; x++) {
for (int y = 0; y < counts[0].length; y++) {
list.add(x * 100 + y);//changed y to x
}
}
//resets the counts in case reset button is pressed & picks random mines
counts = new int[20][20];
for (int i = 0; i < MineNum; i++) {
int choice = (int) (Math.random() * list.size());
counts[list.get(choice) / 100][list.get(choice) % 100] = MINE;
list.remove(choice);
}
//neighbor counts(how many mines are touching this square.)
for (int x = 0; x < counts.length; x++) {
for (int y = 0; y < counts[0].length; y++) {
int neighborCount = 0;
if (counts[x][y] != MINE) {
if(x > 0 && y > 0 && counts[x - 1][y - 1] == MINE) { //a mine is up & left
neighborCount++;
}
if(y > 0 && counts[x][y - 1] == MINE) { //a mine is up
neighborCount++;
}
if(x < counts.length - 1 && y > 0 && counts[x + 1][y - 1] == MINE) { // a mine is left
neighborCount++;
}
if(x > 0 && counts[x - 1][y] == MINE) { //left
neighborCount++;
}
if(x < counts.length - 1 && counts[x + 1][y] == MINE) { //mine is right
neighborCount++;
}
if(x > 0 && y < counts[0].length - 1 && counts[x - 1][y + 1] == MINE) { //mine is down
neighborCount++;
}
if(y < counts[0].length - 1 && counts[x][y + 1]== MINE) {//mine is up right
neighborCount++;
}
if(x < counts[0].length - 1 && y < counts[0].length - 1 && counts[x + 1][y + 1]== MINE) {//mine is down left
neighborCount++;
}
counts[x][y] = neighborCount;
}
}
}
}
public void lostGame() {
for (int x = 0; x < buttons.length; x++) {
for (int y = 0; y < buttons[0].length; y++) {
if (buttons[x][y].isEnabled()) {
if (counts[x][y] != MINE) {
buttons[x][y].setText(counts[x][y] + "");
buttons[x][y].setEnabled(false);
}
else {
buttons[x][y].setText("✪");
buttons[x][y].setEnabled(false);
}
}
}
}
JOptionPane.showMessageDialog(null, "You Lose!\n" + "You clicked on a mine!", "BOOM!", JOptionPane.INFORMATION_MESSAGE);
}
public void checkWin() {
boolean winner = true;
for (int x = 0; x < counts.length; x++) {
for (int y = 0; y < counts[0].length; y++) {
if (counts[x][y] != MINE && buttons[x][y].isEnabled()) {
winner = false;
}
}
}
if (winner == true) {
JOptionPane.showMessageDialog(frame, "You win!");
}
}
public void zeroCleaner(ArrayList<Integer> toClear) {
if (toClear.size() == 0) {
return;
}
else {
int x = toClear.get(0) / 100;
int y = toClear.get(0) % 100;
toClear.remove(0);
if(x > 0 && y > 0 && buttons[x-1][y-1].isEnabled()) { //up and left
buttons[x - 1][y - 1].setText(counts[x-1][y-1] + "");
buttons[x - 1][y - 1].setEnabled(false);
if (counts[x - 1][y - 1] == 0) {
toClear.add((x-1) * 100 + (y-1));
}
}
if (y > 0 && buttons[x][y-1].isEnabled()) { // up
buttons[x][y - 1].setText(counts[x][y-1] + "");
buttons[x][y - 1].setEnabled(false);
if (counts[x][y - 1] == 0) {
toClear.add(x * 100+(y - 1));
}
}
if (x < counts.length - 1 && y > 0 && buttons[x+1][y-1].isEnabled()) { //up right
buttons[x + 1][y - 1].setText(counts[x+1][y-1] + "");
buttons[x + 1][y - 1].setEnabled(false);
if (counts[x + 1][y - 1] == 0) {
toClear.add((x + 1)*100+(y - 1));
}
}
if(x > 0 && y > 0 && buttons[x-1][y].isEnabled()) { //left
buttons[x - 1][y].setText(counts[x-1][y] + "");
buttons[x - 1][y].setEnabled(false);
if (counts[x-1][y] == 0) {
toClear.add((x-1)*100+y);
}
}
if (x < counts.length - 1 && buttons[x+1][y].isEnabled()) { //right
buttons[x + 1][y].setText(counts[x+1][y] + "");
buttons[x + 1][y].setEnabled(false);
if (counts[x + 1][y] == 0) {
toClear.add((x + 1)*100+y);
}
}
if(x > 0 && y < counts[0].length - 1 && buttons[x-1][y+1].isEnabled()) { //down and left
buttons[x - 1][y + 1].setText(counts[x-1][y+1] + "");
buttons[x - 1][y + 1].setEnabled(false);
if (counts[x-1][y+1] == 0) {
toClear.add((x-1)*100+(y+1));
}
}
if (y < counts[0].length - 1 && buttons[x][y+1].isEnabled()) { // down
buttons[x][y + 1].setText(counts[x][y+1] + "");
buttons[x][y + 1].setEnabled(false);
if (counts[x][y + 1] == 0) {
toClear.add(x * 100+(y + 1));
}
}
if (x < counts.length - 1 && y < counts[0].length - 1 && buttons[x+1][y+1].isEnabled()) { //down right
buttons[x + 1][y + 1].setText(counts[x+1][y+1] + "");
buttons[x + 1][y + 1].setEnabled(false);
if (counts[x + 1][y + 1] == 0) {
toClear.add((x + 1)*100+(y + 1));
}
}
zeroCleaner(toClear);
}
}
@Override
public void actionPerformed(ActionEvent event) {
if(event.getSource().equals(reset)) {
//Resets the playing field
for (int x = 0; x < buttons.length; x++) {
for (int y = 0; y < buttons[0].length; y++) {
buttons[x][y].setEnabled(true);
buttons[x][y].setText("▒");
}
}
makeRandomMines();
}
else {
for (int x = 0; x < buttons.length ; x++) {
for (int y = 0; y < buttons[0].length; y++) {
if(event.getSource().equals(buttons[x][y])) {
if (counts[x][y]== MINE) {
lostGame();
}
else if(counts[x][y] == 0) {
buttons[x][y].setText(counts[x][y]+ "");
buttons[x][y].setEnabled(false);
ArrayList<Integer> toClear = new ArrayList<>();
toClear.add(x*100+y);
zeroCleaner(toClear);
checkWin();
}
else {
buttons[x][y].setText(counts[x][y]+ "");
buttons[x][y].setEnabled(false);
checkWin();
}
}
}
}
}
}
}
This should solve your problem:
for (int a = 0; a<buttons.length; a++) {
for (int b = 0; b < buttons[0].length; b++) {
buttons[a][b] = new JButton("▒");
buttons[a][b].addActionListener(this);
final int finalB = b;
final int finalA = a;
buttons[a][b].addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
if (SwingUtilities.isRightMouseButton(e)) {
mineFlagger(true, finalA, finalB);
}
}
});
grid.add(buttons[a][b]);
}
}
public void mineFlagger (boolean flag, int x, int y){
buttons[x][y].setText("F");
}
Edit: for toggling the flag (lazy implementation)
if (SwingUtilities.isRightMouseButton(e)) {
mineFlagger(finalA, finalB);
}
public void mineFlagger(int x, int y) {
if(buttons[x][y].getText().equals("F")) {
buttons[x][y].setText("▒");
} else if (buttons[x][y].getText().equals("▒")){
buttons[x][y].setText("F");
}
}