java中使用双向链表实现贪吃蛇程序源码分享
2015-03-20 11:25
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使用双向链表实现贪吃蛇程序
1.链表节点定义：
package snake;
public class SnakeNode {
private int x;
private int y;
private SnakeNode next;
private SnakeNode ahead;
public SnakeNode() {
}
public SnakeNode(int x, int y) {
super();
this.x = x;
this.y = y;
}
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
public SnakeNode getNext() {
return next;
}
public void setNext(SnakeNode next) {
this.next = next;
}
public SnakeNode getAhead() {
return ahead;
}
public void setAhead(SnakeNode ahead) {
this.ahead = ahead;
}
}
主程序：
package snake;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.KeyEventPostProcessor;
import java.awt.KeyboardFocusManager;
import java.awt.event.KeyEvent;
import java.util.Random;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
/**
* Created by hackcoder on 15-3-11.
*/
public class Snake extends JFrame {
private static final int rows = 60;
private static final int columns = 80;
// 方向
private static final int UP = 1;
private static final int RIGHT = 2;
private static final int DOWN = 3;
private static final int LEFT = 4;
private static int DRIECTION_NOW = RIGHT;
private static boolean isEat = false;
private static int TAILX;
private static int TAILY;
private static SnakeNode snakeHeader = new SnakeNode();
private static SnakeNode snakeTailer = snakeHeader;
private static SnakeNode food = new SnakeNode();
private static JLabel[] images = new JLabel[rows * columns];
public static void main(String args[]) {
snakeHeader.setX(new Random().nextInt(rows - 1));
snakeHeader.setY(new Random().nextInt(columns - 1));
Snake snake = new Snake();
food = getFood();
while (true) {
try {
next();
// 吃到了食物
if (food.getX() == snakeHeader.getX()
&& food.getY() == snakeHeader.getY()) {
addTail();
isEat = true;
}
//吃到食物，重新生成一个食物
if (isEat) {
food = getFood();
}
// 判断是否结束游戏
if (judgeEND()) {
JOptionPane.showMessageDialog(null, "游戏结束！", "游戏结束！",
JOptionPane.ERROR_MESSAGE);
break;
}
SnakeNode pNow = snakeHeader;
while (pNow != null) {
images[columns * pNow.getX() + pNow.getY()]
.setIcon(new ImageIcon("image/black.jpg", ""));
pNow = pNow.getNext();
}
images[columns * food.getX() + food.getY()]
.setIcon(new ImageIcon("image/black.jpg", ""));
Thread.sleep(100);
// 清理
pNow = snakeHeader;
while (pNow != null) {
images[columns * pNow.getX() + pNow.getY()]
.setIcon(new ImageIcon("image/white.jpg", ""));
pNow = pNow.getNext();
}
images[columns * food.getX() + food.getY()]
.setIcon(new ImageIcon("image/white.jpg", ""));
isEat = false;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public Snake() {
init();
this.setBounds(80, 80, 400, 400);
this.setVisible(true);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
// 添加全局键盘监听
KeyboardFocusManager manager = KeyboardFocusManager
.getCurrentKeyboardFocusManager();
manager.addKeyEventPostProcessor((KeyEventPostProcessor) this
.getMyKeyEventHandler());
}
/**
* 初始化地图
*/
public void init() {
JPanel p = new JPanel(new GridLayout(rows, columns, 1, 1));
setLayout(new BorderLayout());
for (int x = 0; x < rows; x++) {
for (int y = 0; y < columns; y++) {
ImageIcon imageIcon;
if (x == 0 || x == rows - 1 || y == 0 || y == columns - 1) {
imageIcon = new ImageIcon("image/red.jpg", "");
} else {
imageIcon = new ImageIcon("image/white.jpg", "");
}
images[columns * x + y] = new JLabel(imageIcon);
p.add(images[columns * x + y]);
}
}
getContentPane().add(p, BorderLayout.CENTER);
}
/**
* 键盘监听
*
* @return
*/
public KeyEventPostProcessor getMyKeyEventHandler() {
return new KeyEventPostProcessor() {
public boolean postProcessKeyEvent(KeyEvent e) {
if (e.getID() != KeyEvent.KEY_PRESSED) {
return false;
}
int keycode = e.getKeyCode();
if (keycode == KeyEvent.VK_UP) {
if (snakeHeader.getNext() != null) {
// 判断方向是否可转
int x1 = snakeHeader.getX();
int y1 = snakeHeader.getY();
int x2 = snakeHeader.getNext().getX();
int y2 = snakeHeader.getNext().getY();
if (y1 == y2 && x1 - x2 == 1) {
return true;
}
}
DRIECTION_NOW = UP;
} else if (keycode == KeyEvent.VK_RIGHT) {
if (snakeHeader.getNext() != null) {
int x1 = snakeHeader.getX();
int y1 = snakeHeader.getY();
int x2 = snakeHeader.getNext().getX();
int y2 = snakeHeader.getNext().getY();
if (x1 == x2 && y2 - y1 == 1) {
return true;
}
}
DRIECTION_NOW = RIGHT;
} else if (keycode == KeyEvent.VK_DOWN) {
if (snakeHeader.getNext() != null) {
int x1 = snakeHeader.getX();
int y1 = snakeHeader.getY();
int x2 = snakeHeader.getNext().getX();
int y2 = snakeHeader.getNext().getY();
if (y1 == y2 && x2 - x1 == 1) {
return true;
}
}
DRIECTION_NOW = DOWN;
} else if (keycode == KeyEvent.VK_LEFT) {
if (snakeHeader.getNext() != null) {
int x1 = snakeHeader.getX();
int y1 = snakeHeader.getY();
int x2 = snakeHeader.getNext().getX();
int y2 = snakeHeader.getNext().getY();
if (x1 == x2 && y1 - y2 == 1) {
return true;
}
}
DRIECTION_NOW = LEFT;
}
return true;
}
};
}
/**
* 计算贪吃蛇的方向及位移
*
* @param header
*/
public static void next() {
if (snakeHeader == null)
return;
TAILX = snakeTailer.getX();
TAILY = snakeTailer.getY();
SnakeNode pNow = snakeTailer;
while (pNow != null) {
if (pNow == snakeHeader) {
break;
}
pNow.setX(pNow.getAhead().getX());
pNow.setY(pNow.getAhead().getY());
pNow = pNow.getAhead();
}
if (DRIECTION_NOW == RIGHT) {
snakeHeader.setY(snakeHeader.getY() + 1);
} else if (DRIECTION_NOW == LEFT) {
snakeHeader.setY(snakeHeader.getY() - 1);
} else if (DRIECTION_NOW == UP) {
snakeHeader.setX(snakeHeader.getX() - 1);
} else if (DRIECTION_NOW == DOWN) {
snakeHeader.setX(snakeHeader.getX() + 1);
}
}
public static void addTail() {
SnakeNode tail = new SnakeNode(TAILX, TAILY);
snakeTailer.setNext(tail);
tail.setAhead(snakeTailer);
snakeTailer = snakeTailer.getNext();
}
public static SnakeNode getFood() {
SnakeNode food = new SnakeNode();
boolean flag = true;
while (true) {
int x = new Random().nextInt(rows);
int y = new Random().nextInt(columns);
if (x == 0 || x == rows - 1 || y == 0 || y == columns - 1) {
continue;
}
SnakeNode pNow = snakeHeader;
while (pNow != null) {
if (x == pNow.getX() && y == pNow.getY()) {
flag = false;
}
pNow = pNow.getNext();
}
if (flag) {
food = new SnakeNode(x, y);
break;
}
}
return food;
}
public static boolean judgeEND() {
//碰墙判断
if (snakeHeader.getX() == 0 || snakeHeader.getX() == rows - 1
|| snakeHeader.getY() == 0 || snakeHeader.getY() == columns - 1) {
return true;
}
//碰身体判断
SnakeNode pNow = snakeHeader.getNext();
while (pNow != null) {
if (snakeHeader.getX() == pNow.getX()
&& snakeHeader.getY() == pNow.getY()) {
System.out.println("=========碰到身体===========");
return true;
}
pNow = pNow.getNext();
}
return false;
}
}
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