java 贪吃蛇程序

公司的一个同事，关系不错，一起搞了一个java的贪吃蛇程序，公司之余的闲弄。
java 代码

/*
窗体显示

*/
class MyFrame extends JFrame
{
public MyFrame()
{
setSize(width,height);
setTitle("snake");
MyPanel p = new MyPanel();
add(p);
setLocation(200,180);
//System.out.println(getBackground());
}
private int width = 500;
private int height = 430;
}

/*
测试程序
*/

public class Snake
{
public static void main(String[] args)
{
MyFrame frame = new MyFrame();
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}








/*主要功能程序*/

import javax.swing.*;
import java.awt.*;
import javax.swing.Timer;
import java.awt.event.*;
import java.util.*;
import java.awt.geom.*;
class MyPanel extends JPanel
{
public MyPanel()
{
clock.start();
snake.add(new Rectangle2D.Double(x,y,8,8));
snake.add(new Rectangle2D.Double(x + 10,y,8,8));
snake.add(new Rectangle2D.Double(x + 20,y,8,8));
snake.add(new Rectangle2D.Double(x + 30,y,8,8));
addKeyListener(new Listener());
setFocusable(true);

}
public void paintComponent(Graphics g0)
{

Graphics2D g = (Graphics2D) g0;
g0.setColor(backcolor);
for(Rectangle2D r : snake)
g.draw(r);
Move();
g.fillRect(108,35,50,10);
g.fillRect(380,35,50,10);
g0.setColor(frontcolor);
for(Rectangle2D r : snake)
g.draw(r);
//if(flag)
while(flag)
{

foodx = (int)Math.round(Math.random()*390)/10*10 + 50;
foody = (int)Math.round(Math.random()*290)/10*10 + 50;
for(Rectangle2D r : snake)
if(r.getX() == foodx && r.getY() == foody) continue;
g.draw(new Rectangle2D.Double(foodx,foody,8,8));
flag = false;
}
g.drawRect(48,48,404,304);
g.drawString("Score "+String.valueOf(score),70,45);
g.drawString(String.valueOf(time),380,45);
if(delay == 0) delay = 1;
else delay = 0;
if(time > 0 && delay == 1) time--;

}
public void Move()
{
if(direction == 0) x += 10; //right
else if(direction == 1) y += 10; //down
else if(direction == 2) x -= 10; //left
else if(direction == 3) y -= 10; //up
if(GameOver()) clock.stop();
if(x == foodx && y == foody)
{
snake.add(new Rectangle2D.Double(foodx,foody,8,8));
flag = true;
num++;
score += time;
time = 20;
}
for(int i=num;i>0;i--)
snake.set(i,snake.get(i - 1));
snake.set(0,new Rectangle2D.Double(x,y,8,8));

}
public boolean GameOver()
{
if(x<50 || x>440 || y<50 || y>340) return true;
else return false;
}

class MyListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
repaint();
}
}
class Listener implements KeyListener
{
public void keyTyped(KeyEvent e)
{
}

public void keyPressed(KeyEvent e)
{
int key = e.getKeyCode(); // getKeyCode()
if(key == e.VK_RIGHT && direction != 2) direction = 0; //right
else if(key == e.VK_DOWN && direction != 3) direction = 1; //down
else if(key == e.VK_LEFT && direction != 0) direction = 2; //left
else if(key == e.VK_UP && direction != 1) direction = 3; //up
}

public void keyReleased(KeyEvent e)
{
}
}

private int foodx;
private int foody;
private int x = 70;
private int y = 100;
private int num = 3;
private int delay =0;
private int score = 0;
private int time = 20;
private int direction = 0;
private boolean flag = true;
private Color frontcolor = new Color(51,51,51);
private Color backcolor = new Color(238,238,238);
private Timer clock = new Timer(300,new MyListener());
private ArrayList<Rectangle2D> snake = new ArrayList<Rectangle2D>();


}