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board.java
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board.java
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package com.company;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
public class board extends JPanel {
public final int defW = 12, defH = 12, defM = 40;
private int width = defW, height = defH, numMines = defM, numVisited = 0, clicks = 0;
public ArrayList<ArrayList<cell>> x;
private boolean mineClicked = false;
public void setWidth(int w) {
width = w;
}
public void setHeight(int h) {
height = h;
}
public void setNumMines(int n) {
numMines = n;
}
public void setNumVisited(int n) { numVisited = n; }
public void setClicks(int n) { clicks = n; }
public int getNumMines() { return numMines;}
public void resetBoard() {
mineClicked = false;
removeAll();
x.clear();
}
public void fillBoard(){
setLayout(new GridLayout(height, width));
int cellNum = 0; // to count number of cells to make it easy to add the right number of mines
// create 2d array list of cells
for (int i = 0; i < width; i++){
ArrayList<cell> c = new ArrayList<>();
for (int j = 0; j < height; j++){
c.add(new cell());
}
x.add(c);
}
// transpose matrix of cells
ArrayList<ArrayList<cell>> temp = x;
for(int i = 0; i < width; i++){
ArrayList<cell> r = new ArrayList<>();
for(int j = 0; j < height; j++){
r.add(x.get(j).get(i));
// set the first n cells to mines
if (cellNum < numMines){
r.get(j).setMine();
}
cellNum++;
}
temp.add(r);
}
x = temp;
// shuffle the matrix for random distribution of mines
for (int i = 0; i < width; i++){
Collections.shuffle(x.get(i));
for (int j = 0; j < height; j++){
add(x.get(i).get(j));
x.get(i).get(j).addActionListener(AL);
x.get(i).get(j).setX(i);
x.get(i).get(j).setY(j);
}
}
setVisible(true);
repaint();
revalidate();
}
public void findMines(cell n){
int num = 0;
// calculates number of mines in immediate vicinity
if (n.Y + 1 < height) {
if (x.get(n.X).get(n.Y + 1).isMine) { num++; }
}
if (n.X + 1 < width && n.Y + 1 < height) {
if (x.get(n.X + 1).get(n.Y + 1).isMine) { num++; }
}
if (n.X + 1 < width) {
if (x.get(n.X + 1).get(n.Y).isMine) { num++; }
}
if (n.X + 1 < width && n.Y - 1 > -1) {
if (x.get(n.X + 1).get(n.Y - 1).isMine) { num++; }
}
if (n.Y - 1 > -1) {
if (x.get(n.X).get(n.Y - 1).isMine) { num++; }
}
if (n.X - 1 > -1 && n.Y - 1 > -1) {
if (x.get(n.X - 1).get(n.Y - 1).isMine) { num++; }
}
if (n.X - 1 > -1){
if (x.get(n.X - 1).get(n.Y).isMine) { num++; }
}
if (n.X - 1 > -1 && n.Y + 1 < height) {
if (x.get(n.X - 1).get(n.Y + 1).isMine) { num++; }
}
// if no mines around sets color to light gray and does a dfs
if (num == 0) {
if (!n.isMine) {
n.setBackground(Color.LIGHT_GRAY);
if (!n.visited) {
n.setVisited();
numVisited++;
if (n.Y + 1 < height) {
findMines(x.get(n.X).get(n.Y + 1));
}
if (n.X + 1 < width && n.Y + 1 < height) {
findMines(x.get(n.X + 1).get(n.Y + 1));
}
if (n.X + 1 < width) {
findMines(x.get(n.X + 1).get(n.Y));
}
if (n.X + 1 < width && n.Y - 1 > -1) {
findMines(x.get(n.X + 1).get(n.Y - 1));
}
if (n.Y - 1 > -1) {
findMines(x.get(n.X).get(n.Y - 1));
}
if (n.X - 1 > -1 && n.Y - 1 > -1) {
findMines(x.get(n.X - 1).get(n.Y - 1));
}
if (n.X - 1 > -1) {
findMines(x.get(n.X - 1).get(n.Y));
}
if (n.X - 1 > -1 && n.Y + 1 < height) {
findMines(x.get(n.X - 1).get(n.Y + 1));
}
}
}
}
// if there are mines around, sets text of the cell to number of mines around
else {
n.setText(String.valueOf(num));
n.setVisited();
if (n.timesCalled == 1) { numVisited++; }
}
// if no mine has been clicked check for win
if (!mineClicked) {
checkWin();
}
}
public void checkWin() {
// creates the jdialog for win message
JDialog win = new JDialog();
win.setSize(250, 200);
win.setLayout(new BorderLayout());
JLabel youWin = new JLabel("YOU WIN!");
youWin.setHorizontalAlignment(SwingConstants.CENTER);
youWin.setFont(new Font("Arial", Font.PLAIN, 40));
win.add(youWin, BorderLayout.CENTER);
JButton OK = new JButton("OK");
OK.addActionListener(actionEvent -> win.setVisible(false));
win.add(OK, BorderLayout.SOUTH);
// set jdialog to visible and stops game if all non-mine cells have been visited
if (numVisited == ((height * width) - numMines)) {
win.setVisible(true);
Minesweeper.setRunning(false);
}
}
// if a mine is clicked, stop game, reveal all cells, and display lose message box
public void explode(){
Minesweeper.setRunning(false);
mineClicked = true;
for (int i = 0; i < width; i++){
for (int j = 0; j < height; j++){
findMines(x.get(i).get(j));
x.get(i).get(j).showMine();
}
}
JDialog lose = new JDialog();
lose.setSize(250, 200);
lose.setLayout(new BorderLayout());
JLabel youLose = new JLabel("YOU LOSE");
youLose.setHorizontalAlignment(SwingConstants.CENTER);
youLose.setFont(new Font("Arial", Font.PLAIN, 40));
lose.add(youLose, BorderLayout.CENTER);
JButton oK = new JButton("OK");
oK.addActionListener(e -> lose.setVisible(false));
lose.add(oK, BorderLayout.SOUTH);
lose.setVisible(true);
}
// action listener for when a cell is clicked. ensures first cell clicked is not a mine by moving the mine if it was
// originally assigned as a mine
public ActionListener AL = actionEvent -> {
clicks++;
int numChanged = 0;
cell currCell = (cell) actionEvent.getSource();
if (clicks == 1){
if (currCell.isMine){
for (int i = 0; i < width; i++){
for (int j = 0; j < height; j++){
if (!x.get(i).get(j).isMine && numChanged == 0 && x.get(i).get(j) != currCell){
x.get(i).get(j).setMine();
numChanged++;
}
}
}
currCell.isMine = false;
}
}
// if mine is clicked, call explode
if (currCell.isMine){
explode();
}
// else call the dfs
else {
findMines(currCell);
}
};
public board(){
x = new ArrayList<>();
setSize(500, 500);
}
}