本文实例讲述了Java GUI编程之贪吃蛇游戏简单实现方法。分享给大家供大家参考，具体如下：
例子简单，界面简陋 请见谅
项目结构如下
Constant.jvava 代码如下：
package snake;
public class Constant {
public static final int LEFT = 0;
public static final int RIGHT = 1;
public static final int UP = 3;
public static final int DOWN = 4;
public static final int COLS = 30;
public static final int ROWS = 30;
public static final int BODER_SIZE = 15;
}
Node.java代码如下：
package snake;
public class Node {
private int row;
private int col;
public Node() {
};
public Node(int row, int col) {
this.row = row;
this.col = col;
};
public Node(int dir, Node node) {
if (dir == Constant.LEFT) {
this.col = node.getCol() - 1;
this.row = node.getRow();
} else if (dir == Constant.RIGHT) {
this.col = node.getCol() + 1;
this.row = node.getRow();
} else if (dir == Constant.UP) {
this.row = node.getRow() - 1;
this.col = node.getCol();
} else {
this.row = node.getRow() + 1;
this.col = node.getCol();
}
}
public boolean equals(Object obj) {
if (obj instanceof Node) {
Node node = (Node) obj;
if (this.col == node.col && this.row == node.row) {
return true;
} else {
return false;
}
} else {
return false;
}
}
public int getRow() {
return row;
}
public void setRow(int row) {
this.row = row;
}
public int getCol() {
return col;
}
public void setCol(int col) {
this.col = col;
}
public String toString() {
return "col:" + this.col + " row:" + this.row;
}
}
Egg.java代码如下：
package snake;
import java.awt.Color;
import java.awt.Graphics;
import java.util.Random;
public class Egg extends Node {
Color color;
public static Random random = new Random();
public Egg(int row, int col) {
super(row, col);
this.color = Color.green;
}
public Egg() {
super();
int col = random.nextInt(Constant.COLS - 4) + 2;
int row = random.nextInt(Constant.ROWS - 4) + 2;
this.setCol(col);
this.setRow(row);
}
void draw(Graphics g) {
if (this.color == Color.green) {
this.color = Color.red;
} else {
this.color = Color.green;
}
g.setColor(this.color);
int boderSize = Constant.BODER_SIZE;
g.fillOval(this.getCol() * boderSize, this.getRow() * boderSize,
boderSize, boderSize);
}
public Color getColor() {
return color;
}
public void setColor(Color color) {
this.color = color;
}
}
Snake.java代码如下：
package snake;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;
public class Snake {
int dir;
List nodeList = new ArrayList();
boolean isOverstep = false;
public Snake() {
this.dir = Constant.LEFT;
for (int i = 0; i < 3; i++) {
Node node = new Node(20, 15 + i);
this.nodeList.add(node);
}
}
void forward() {
addNode();
nodeList.remove(nodeList.size() - 1);
}
private void addNode() {
Node node = nodeList.get(0);
node = new Node(dir, node);
nodeList.add(0, node);
}
boolean eatEgg(Egg egg) {
if (nodeList.contains(egg)) {
addNode();
return true;
} else {
return false;
}
}
void draw(Graphics g) {
g.setColor(Color.black);
for (int i = 0; i < this.nodeList.size(); i++) {
Node node = this.nodeList.get(i);
if (node.getCol() > (Constant.COLS - 2) || node.getCol() < 2
|| node.getRow() > (Constant.ROWS - 2) || node.getRow() < 2) {
this.isOverstep = true;
}
g.fillRect(node.getCol() * Constant.BODER_SIZE, node.getRow()
* Constant.BODER_SIZE, Constant.BODER_SIZE,
Constant.BODER_SIZE);
}
forward();
}
void keyPress(KeyEvent e) {
int key = e.getKeyCode();
switch (key) {
case KeyEvent.VK_LEFT:
if (this.dir != Constant.LEFT)
this.dir = Constant.LEFT;
break;
case KeyEvent.VK_RIGHT:
if (this.dir != Constant.RIGHT)
this.dir = Constant.RIGHT;
break;
case KeyEvent.VK_UP:
if (this.dir != Constant.UP)
this.dir = Constant.UP;
break;
case KeyEvent.VK_DOWN:
if (this.dir != Constant.DOWN)
this.dir = Constant.DOWN;
break;
default:
break;
}
}
public int getDir() {
return dir;
}
public void setDir(int dir) {
this.dir = dir;
}
public List getNodeList() {
return nodeList;
}
public void setNodeList(List nodeList) {
this.nodeList = nodeList;
}
public boolean isOverstep() {
return isOverstep;
}
public void setOverstep(boolean isOverstep) {
this.isOverstep = isOverstep;
}
}
主界面Mainframe.java代码如下：
package snake;
import java.awt.Color;
import java.awt.Font;
import java.awt.frame;
import java.awt.Graphics;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class Mainframe extends frame {
private static final long serialVersionUID = -5227266702753583633L;
Color color = Color.gray;
static Egg egg = new Egg();
Snake snake = new Snake();
boolean gameOver = false;
PaintThread paintThread = new PaintThread();
public Mainframe() {
init();
}
void init() {
this.setBounds(200, 200, Constant.COLS * Constant.BODER_SIZE,
Constant.ROWS * Constant.BODER_SIZE);
this.setResizable(true);
this.repaint();
this.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
this.addKeyListener(new KeyMomiter());
new Thread(paintThread).start();
}
public void paint(Graphics g) {
Color c = g.getColor();
g.setColor(Color.GRAY);
g.fillRect(0, 0, Constant.COLS * Constant.BODER_SIZE, Constant.ROWS
* Constant.BODER_SIZE);
g.setColor(Color.DARK_GRAY);
for (int i = 0; i < Constant.ROWS; i++) {
g.drawLine(0, i * Constant.BODER_SIZE, Constant.COLS
* Constant.BODER_SIZE, i * Constant.BODER_SIZE);
}
for (int i = 0; i < Constant.COLS; i++) {
g.drawLine(i * Constant.BODER_SIZE, 0, i * Constant.BODER_SIZE,
Constant.ROWS * Constant.BODER_SIZE);
}
g.setColor(Color.yellow);
g.setFont(new Font("宋体", Font.BOLD, 20));
g.drawString("score:" + getScore(), 10, 60);
if (gameOver) {
g.setColor(Color.red);
g.drawString("GAME OVER", 100, 60);
this.paintThread.pause = true;
}
g.setColor(c);
if (snake.eatEgg(egg)) {
egg = new Egg();
}
snake.draw(g);
egg.draw(g);
}
int getScore() {
return snake.getNodeList().size();
}
class PaintThread implements Runnable {
private boolean isRun = true;
private boolean pause = false;
@Override
public void run() {
while (isRun) {
if (pause) {
continue;
} else {
if (snake.isOverstep == true) {
gameOver = true;
}
repaint();
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void pause() {
this.pause = true;
}
public void restart() {
this.pause = true;
snake = new Snake();
}
public void gameOver() {
isRun = false;
}
}
void stop() {
gameOver = true;
}
class KeyMomiter extends KeyAdapter {
@Override
public void keyPressed(KeyEvent e) {
super.keyPressed(e);
int key = e.getKeyCode();
if (key == KeyEvent.VK_F2) {
paintThread.restart();
} else {
snake.keyPress(e);
}
}
}
@SuppressWarnings("deprecation")
public static void main(String[] args) {
Mainframe mainframe = new Mainframe();
mainframe.show();
}
}
运行效果：
附：完整实例代码点击此处本站下载。
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