java学习之贪吃蛇(1)

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   implements 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

             private Set<SnakeListener> listeners = new HashSet<SnakeListener>();      //定义一个监听器集合，add

            ------------------------------------------------------------------------------------------------------

             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);
            }

             --------------------------------------------------------------------------------------------------------------------------------
             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