snake 包括几个属性
1.move 移动
2.draw 画出自己
3.changeDirection 改变方向
4.isEatBody 吃到了自己
5.isEatFood 迟到了食物
6.isEatRock 吃到了石头
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Food 包括几个属性
1.draw 画出自己
2.isSnakeEatFood 蛇迟到了自己
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Ground 包括几个属性
1.draw 画出自己
2.isSnakeEatRock 蛇迟到了自己
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GamePanel 包括几个属性
1.redisplay 重新画出蛇，食物，石头
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自己定义的监听器部分 分为4部分，
1 建立侦听接口，例如下边的snakelistener
2 控制继承接口，后实现接口类中定义的方法 ，例如下边的controller
3 在第三个类中添加监听器，并且定义添加监听器的方法addactivelistener123(snakelistener l)，例如下边的snake
4 为其他的类中addactivelistener123(controller)
1.监听接口SnakeListener
public interface SnakeListener {
void snakeMoveddisplay(); //接口只定义方法，没有方法体
}
2.控制类 controller SnakeListener
@Override
public void snakeMoveddisplay() { //实现方法体
// TODO Auto-generated method stub
gamepanel.display(snake,food,ground);
}
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3.Snake
public void addSnakeListener(SnakeListener l){ //定义向监听器集合中添加监听器的方法
if(l!=null)
this.listeners.add(l);
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for(SnakeListener l :listeners){ //遍历监听器集合，如果有就触发，执行如下方法
l.snakeMoveddisplay();
}
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4.GameFrame 主窗体
sanke.addSnakeListener(controller)
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snake
-------------------------------
package com;
import java.awt.Graphics;
import java.awt.Point;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Set;
public class Snake {
private Set<SnakeListener> listeners = new HashSet<SnakeListener>();
public void changeDirection(){
System.out.println("snake 's changedirection");
}
public void isEatBody(){
System.out.println("snake's isEatBody");
}
public void eatFood(){
System.out.println("snake's eatfood");
}
public void move(){
System.out.println("snake move");
}
//定义一个线程，让蛇不停的移动
private class SnakeDriver implements Runnable{
public void run(){
while(true){
move();
//触发监听事件
for(SnakeListener l :listeners){
l.snakeMoveddisplay();
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
public void addSnakeListener(SnakeListener l){
if(l!=null)
this.listeners.add(l);
}
public void draw(){
System.out.println("my name is a snake");
}
//启动线程的方法,让蛇开始走
public void start(){
new Thread(new SnakeDriver()).start();
}
}
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food
-------------------------------
package com;
public class Food {
public boolean isSnakeEatFood(Snake snake){
System.out.println("food's issnakeeatfood");
return false;
}
public void draw(){
System.out.println("food draw");
}
}
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ground
-------------------------------
package com;
public class Ground {
public boolean isSnakeEatRock(Snake snake){
System.out.println("Ground's issankeeatrock");
return false;
}
public void draw(){
System.out.println("rock 's drawME");
}
}
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gamepanel
-------------------------------
package com;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import javax.swing.JPanel;
import javax.swing.border.EtchedBorder;
import cn.snake;
/**
* 游戏的显示界面<BR>
* 可以用 setBackgroundColor() 设置游戏的背景色
*
* @version 1.0, 15/04/18
*
* @author 刘洋
*
*/
public class GamePanel extends JPanel {
//先定义，然后通过display传参对sanke等赋值，使整个程序的snake food等统一。
private Snake snake;
private Food food;
private Ground ground;
//display 后边更的是参数，目的是为了给上边的private snake等赋值,
//由于display是在controller中用到，所以通过赢引用参数赋值后的，本类中的snake，food，
//就是controller中定义的snake，food
public void display(Snake snake,Food food,Ground ground){
System.out.println("gamepanel's display");
this.snake = snake;
this.food = food;
this.ground = ground;
this.repaint();
}
@Override
protected void paintComponent(Graphics g) {
// TODO Auto-generated method stub
this.snake.draw();
this.food.draw();
System.out.println("repaint");
this.ground.draw();
}
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SnakeListener
-------------------------------
package com;
public interface SnakeListener {
void snakeMoveddisplay();
}
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controller
-------------------------------
package com;
import com.Food;
import com.GamePanel;
import com.Ground;
import com.Snake;
import com.SnakeListener;
public class controller implements SnakeListener{
//controller这里我们也定义了snake，food等，但是在本类里没有被new,或赋值，我们还需要将已经复制或new的snake，food传进来。
private Snake snake ;
private Food food ;
private Ground ground ;
GamePanel gamepanel;
@Override
public void snakeMoveddisplay() {
// TODO Auto-generated method stub
gamepanel.display(snake,food,ground);
}
//测试的时候主窗口中new sanke 、new food，而且在主窗口中调用controller（snake，。。）这里就是通过controller进行传参。
public controller(Snake snake, Food food, Ground ground, GamePanel gamepanel) {
super();
this.snake = snake;
this.food = food;
this.ground = ground;
this.gamepanel = gamepanel;
}
public void newgame(){
//定义什么时候为开始游戏呢？蛇开始走的时候。
snake.start();
}
}
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gameframe 测试的窗体，如果不用frame和add（gamepanel，B）,那么gamepanel的repain()重绘图就不好使。记住
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package com;
import java.awt.BorderLayout;
import javax.swing.JFrame;
public class
gameframe {
public static void main(String[] args){
Snake snake = new Snake();
Food food = new Food();
Ground ground = new Ground();
GamePanel gamepanel= new GamePanel();
controller cont = new controller(snake,food,ground,gamepanel);
snake.addSnakeListener(cont);
javax.swing.JFrame frame= new JFrame();
frame.setSize(300,300);
frame.add(gamepanel,BorderLayout.CENTER);
frame.setVisible(true);
cont.newgame();
}
}
以上仅是一个简单的思路还需要进一步的扩展，实现效果为
执行gameframe后会打出如下内容
snake move
gamepanel's display
my name is a snake
food draw
repaint
rock 's drawME
my name is a snake
food draw
repaint
rock 's drawME
snake move
gamepanel's display
my name is a snake
food draw
repaint
实现蛇每移动一次，gamepanel就重新显示一遍snake food ground
