import java.awt.*;
import java.awt.event.KeyEvent;
public class Snake {
int x，y，oldX，oldY;
int id;
private static int WIDTH=20，HEIGHT=20，dx=20，dy=20;
static Direction dir=Direction.STOP;
boolean head;//判断是否是是蛇头
SnakeClient sc=null;
private boolean live;
public Snake(int x， int y， boolean head，int id，SnakeClient sc) {
this.x = x;
this.y = y;
this.head = head;
this.id=id;
this.sc=sc;
}
void draw(Graphics g){
move();
Color c=g.getColor();
if(head){
g.setColor(Color.red);
}else{
g.setColor(Color.green);
}
g.fillRect(x， y， WIDTH， HEIGHT);
g.setColor(Color.black);
g.drawRect(x， y， WIDTH， HEIGHT);
g.setColor(c);
}
public void keyPressed(KeyEvent e) {
if(!head) return;
int key=e.getKeyCode();
switch(key){
case KeyEvent.VK_UP:
if(Direction.D==dir) break;
dir=Direction.U;
break;
case KeyEvent.VK_DOWN:
if(Direction.U==dir) break;
dir=Direction.D;
break;
case KeyEvent.VK_LEFT:
if(Direction.R==dir) break;
dir=Direction.L;
break;
case KeyEvent.VK_RIGHT:
if(Direction.L==dir) break;
dir=Direction.R;
break;
case KeyEvent.VK_F2:
if(!live){
sc.snakes.add(sc.s);
}
}
}
//  从蛇头到蛇尾编号id从0递增，根据id来移动蛇身，具体如下，记录下当前位置oldX，oldY
//  当move()时，根据id-1的蛇身改变自己的位置；
void move(){
oldX=x;
oldY=y;
if(!head){
if(dir==Direction.STOP) return;
for(int i=0;i<sc.snakes.size();i++){
if(sc.snakes.get(i).id==id-1){
x=sc.snakes.get(i).oldX;
y=sc.snakes.get(i).oldY;
}
}
return;
}
switch(dir){
case U:
y-=dy;
break;
case R:
x+=dx;
break;
case D:
y+=dy;
break;
case L:
x-=dx;
break;
case STOP:
break;
}
//新版贪吃蛇，当到达边界时从另外一边出来
if(x<3) x=383;
if(x>383) x=3;
if(y<25) y=405;
if(y>405) y=25;
}
public Rectangle getRect(){
return new Rectangle(x，y，WIDTH-1，HEIGHT-1);
}
boolean eatEgg(Egg e){
if(!head) {
return false;
}
else{
return e.getRect().intersects(this.getRect());
}
}
boolean hitSnake(Snake s){
if(!head) return false;
if(s.getRect().intersects(this.getRect())){
live = false;
return true;
}else{
return false;
}
}
}
[java] view plaincopy
import java.awt.*;
import java.util.*;
public class Egg {
private static int WIDTH=20，HEIGHT=20;
private static Random r=new Random();
int x=3+20*r.nextInt(20);
int y=25+20*r.nextInt(20);
void draw(Graphics g){
Color c=g.getColor();
g.setColor(Color.pink);
g.fillOval(x， y， WIDTH， HEIGHT);
g.setColor(c);
}
public Rectangle getRect(){
return new Rectangle(x，y，WIDTH，HEIGHT);
}
}
public enum Direction {
U，R，D，L，STOP;
}