java 实现迷宫堆栈 java 编写迷宫游戏

package maze;
 
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.Random;
import java.util.Stack;
import javax.swing.*;

* */
 
// 格子
class Lattice {
 static final int INTREE = 1;
 static final int NOTINTREE = 0;
 private int x = -1; // 格子的位置，在第几行
 private int y = -1; // 第几列
 private int flag = NOTINTREE; // flag，标识格子是否已加入树中
 private Lattice father = null; // 格子的父亲节点
 
 public Lattice(int xx, int yy) {
 x = xx;
 y = yy;
 }
 
 public int getX() {
 return x;
 }
 
 public int getY() {
 return y;
 }
 
 public int getFlag() {
 return flag;
 }
 
 public Lattice getFather() {
 return father;
 }
 
 public void setFather(Lattice f) {
 father = f;
 }
 
 public void setFlag(int f) {
 flag = f;
 }
}
 
 class Maze extends JPanel {
 private static final long serialVersionUID = -8300339045454852626L;
 private int NUM, width, padding; // NUM：迷宫大小；width：每个格子的宽度和高度
 private Lattice[][] maze;
 private int ballX, ballY; // 球的位置，在第几行第几列格子上
 private boolean drawPath = false; // flag，标识是否画出路径
 
 Maze(int m, int wi, int p) {
 NUM = m;
 width = wi;
 padding = p;
 maze = new Lattice[NUM][NUM];
 for (int i = 0; i < NUM; i++) {
 for (int j = 0; j < NUM ; j++) {
 maze[i][j] = new Lattice(i, j);
 }
 }
 createMaze();
 setKeyListener();
 this.setFocusable(true);
 }
 
 // 初始化游戏，重开一局时使用
 private void init() {
 for (int i = 0; i <= NUM - 1; i++) {
 for (int j = 0; j <= NUM - 1; j++) {
 maze[i][j].setFather(null);
 maze[i][j].setFlag(Lattice.NOTINTREE);
 }
 }
 ballX = 0;
 ballY = 0;
 drawPath = false;
 createMaze();
 this.setFocusable(true);
 repaint();
 }
 
 // 由格子的行数，得到格子中心点的像素X座标
 public int getCenterX(int x) {
 return padding + x * width + width / 2;
 }
 
 // 由格子的列数，得到格子中心点的像素Y座标
 public int getCenterY(int y) {
 return padding + y * width + width / 2;
 }
 
 public int getCenterX(Lattice p) {
 return padding + p.getY() * width + width / 2;
 }
 
 public int getCenterY(Lattice p) {
 return padding + p.getX() * width + width / 2;
 }
 
 // 检查是否到达最后一个格子，若是则走出了迷宫，重开一局游戏
 private void checkIsWin() {
 if (ballX == NUM - 1 && ballY == NUM - 1) {
 JOptionPane.showMessageDialog(null, "你走出了迷宫。", "YOU WIN !", JOptionPane.PLAIN_MESSAGE);
 init();
 }
 }
 
 // 移动小球，c为按键码
 synchronized private void move(int c) {
 int tx = ballX, ty = ballY;
 switch (c) {
 case KeyEvent.VK_LEFT:
 ty--;
 break;
 case KeyEvent.VK_RIGHT:
 ty++;
 break;
 case KeyEvent.VK_UP:
 tx--;
 break;
 case KeyEvent.VK_DOWN:
 tx++;
 break;
 case KeyEvent.VK_R:
 init();
 break;
 case KeyEvent.VK_SPACE:
 if (drawPath == true) {
 drawPath = false;
 } else {
 drawPath = true;
 }
 break;
 }
 // 若移动后未出界且格子之间有路径，则进行移动，更新小球位置，否则移动非法
 if (!isOutOfBorder(tx, ty) && (maze[tx][ty].getFather() == maze[ballX][ballY] || maze[ballX][ballY].getFather() == maze[tx][ty])) {
 ballX = tx;
 ballY = ty;
 }
 }
 
 private void setKeyListener() {
 this.addKeyListener(new KeyAdapter() {
 public void keyPressed(KeyEvent e) {
 int c = e.getKeyCode();
 move(c);
 repaint();
 checkIsWin();
 }
 });
 }
 
 // 是否出界
 private boolean isOutOfBorder(Lattice p) {
 return isOutOfBorder(p.getX(), p.getY());
 }
 
 private boolean isOutOfBorder(int x, int y) {
 return (x > NUM - 1 || y > NUM - 1 || x < 0 || y < 0) ? true : false;
 }
 
 // 获取格子的邻居格子
 private Lattice[] getNeis(Lattice p) {
 final int[] adds = {-1, 0, 1, 0, -1};
 if (isOutOfBorder(p)) {
 return null;
 }
 Lattice[] ps = new Lattice[4]; // 四个邻居格子，顺序为上右下左，出界的邻居为null
 int xt;
 int yt;
 for (int i = 0; i <= 3; i++) {
 xt = p.getX() + adds[i];
 yt = p.getY() + adds[i + 1];
 if (isOutOfBorder(xt, yt)) {
 continue;
 }
 ps[i] = maze[xt][yt];
 }
 return ps;
 }
 
 // 构建随机树，创建迷宫
 private void createMaze() {
 // 随机选一个格子作为树的根
 Random random = new Random();
 // 深度优先遍历
 Stack<Lattice> s = new Stack<Lattice>();
 Lattice p = maze[0][0];
 Lattice neis[] = null;
 s.push(p);
 while (!s.isEmpty()) {
 p = s.pop();
 p.setFlag(Lattice.INTREE);
 neis = getNeis(p);
 int ran = Math.abs(random.nextInt()) % 4;
 for (int a = 0; a <= 3; a++) {
 ran++;
 ran %= 4;
 if (neis[ran] == null || neis[ran].getFlag() == Lattice.INTREE)
 continue;
 s.push(neis[ran]);
 neis[ran].setFather(p);
 }
 }
 }
 
 // 抹掉两个格子之间的边
 private void clearFence(int i, int j, int fx, int fy, Graphics g) {
 int sx = padding + ((j > fy ? j : fy) * width),
 sy = padding + ((i > fx ? i : fx) * width),
 dx = (i == fx ? sx : sx + width),
 dy = (i == fx ? sy + width : sy);
 if (sx != dx) {
 sx++;
 dx--;
 } else {
 sy++;
 dy--;
 }
 g.drawLine(sx, sy, dx, dy);
 }
 
 // 画迷宫
 protected void paintComponent(Graphics g) {
 super.paintComponent(g);
 // 画NUM*NUM条黑线
 for (int i = 0; i <= NUM; i++) {
 g.drawLine(padding + i * width, padding, padding + i * width,
 padding + NUM * width);
 }
 for (int j = 0; j <= NUM; j++) {
 g.drawLine(padding, padding + j * width, padding + NUM * width,
 padding + j * width);
 }
 // 使用背景色，在有路径的格子之间画边，把墙抹掉
 g.setColor(this.getBackground());
 for (int i = NUM - 1; i >= 0; i--) {
 for (int j = NUM - 1; j >= 0; j--) {
 Lattice f = maze[i][j].getFather();
 if (f != null) {
 int fx = f.getX(), fy = f.getY();
 clearFence(i, j, fx, fy, g);
 }
 }
 }
 // 画左上角的入口
 g.drawLine(padding, padding + 1, padding, padding + width - 1);
 int last = padding + NUM * width;
 // 画右下角出口
 g.drawLine(last, last - 1, last, last - width + 1);
 // 画小球
 g.setColor(Color.RED);
 g.fillOval(getCenterX(ballY) - width / 3, getCenterY(ballX) - width / 3, width / 2, width / 2);
 if (drawPath == true) {
 drawPath(g);
 }
 }
 private void drawPath(Graphics g) {
 Color PATH_COLOR = Color.red;
 if (drawPath == true) {
 g.setColor(PATH_COLOR);
 } else {
 g.setColor(this.getBackground());
 }
 Lattice p = maze[NUM - 1][NUM - 1];
 while (p.getFather() != null) {
 p.setFlag(2);
 p = p.getFather();
 }
 g.fillOval(getCenterX(p) - width / 3, getCenterY(p) - width / 3, width / 2, width / 2);
 p = maze[0][0];
 while (p.getFather() != null) {
 if (p.getFlag() == 2) {
 p.setFlag(3);
 }
 g.drawLine(getCenterX(p), getCenterY(p), getCenterX(p.getFather()), getCenterY(p.getFather()));
 p = p.getFather();
 }
 g.setColor(PATH_COLOR);
 p = maze[NUM - 1][NUM - 1];
 while (p.getFather() != null) {
 if (p.getFlag() == 3) {
 break;
 }
 g.drawLine(getCenterX(p), getCenterY(p), getCenterX(p.getFather()), getCenterY(p.getFather()));
 p = p.getFather();
 }
 }
 
 
 public static void main(String[] args) {
 final int n = 30, width = 600, padding = 20, LX = 450, LY = 100;
 JPanel p = new Maze(n, (width - padding - padding) / n, padding);
 JFrame frame = new JFrame("MAZE(按空格键显示或隐藏路径,按R重新开始。)");
 frame.getContentPane().add(p);
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setSize(width + padding, width + padding + padding);
 frame.setLocation(LX, LY);
 frame.setVisible(true);
 }
}