控制台版Snake - 黑马程序员技术交流社区

package cn.itcast.snake;
import java.awt.Point;
import java.util.LinkedList;
import java.util.Random;
/*
食物其实就是一个坐标，
*/
import javax.swing.plaf.basic.BasicInternalFrameTitlePane.MoveAction;
public class SnakeGame {
//宽
public static final int WIDTH = 40;
//高
public static final int HEIGHT = 10;
//地图
char[][] background = new char[HEIGHT][WIDTH];
//蛇
private LinkedList<Point> snakes = new LinkedList<Point>();
//食物
private Point food;
//四个常量代表了四个方向
public static final int DIRECTION_UP = 1; //上
public static final int DIRECTION_DOWN = -1; //下
public static final int DIRECTION_LEFT = 2; //左
public static final int DIRECTION_RIGHT = -2; // 右
//当前的方向
private int currentDirecion = 2;
//蛇移动应该是根据当前的方向进行移动的。
public void move(){
//获取原始头的位置
Point head = snakes.getFirst();
switch (currentDirecion) {
case DIRECTION_UP:
snakes.addFirst(new Point(head.x,head.y-1));
break;
case DIRECTION_DOWN:
snakes.addFirst(new Point(head.x,head.y+1));
break;
case DIRECTION_LEFT:
snakes.addFirst(new Point(head.x-1,head.y));
break;
case DIRECTION_RIGHT:
snakes.addFirst(new Point(head.x+1,head.y));
break;
}
//删除蛇尾
snakes.removeLast();
}
//改变蛇方向的方法
public void changeDirection(int newDirection){
if(newDirection+currentDirecion!=0){
//不是反方向
this.currentDirecion = newDirection;
}
}
//生成食物
public void createFood(){
Random random = new Random();
while(true){
int x = random.nextInt(WIDTH); //
int y = random.nextInt(HEIGHT);
if(background[y][x]!='*'){
food = new Point(x, y);
break;
}
}
}
//显示食物--- 把食物的坐标反馈到地图上，在地图上画上相应的字符
public void showFood(){
background[food.y][food.x] = '@';
}
//初始化蛇节点
public void initSnake(){
int x = WIDTH/2;
int y = HEIGHT/2;
snakes.addFirst(new Point(x-1, y));
snakes.addFirst(new Point(x, y));
snakes.addFirst(new Point(x+1, y));
}
//显示蛇（把蛇的坐标反馈到地图上，在地图上对应的位置画上对应的符号而已）
public void showSnake(){
//画蛇头
Point head = snakes.getFirst();
background[head.y][head.x] = ';
//画蛇身
for(int i =1 ; i< snakes.size() ; i++){
Point body = snakes.get(i);
background[body.y][body.x] = '#';
}
}
//初始化地图
public void initBackground(){
for(int rows = 0 ; rows<HEIGHT ; rows++){
for(int cols = 0 ; cols<WIDTH ; cols++){
//第一行、最后一行、第一列、最后一列
if(rows==0||rows==(HEIGHT-1)||cols==0||cols==(WIDTH-1)){
background[rows][cols] = '*';
}else{
background[rows][cols] = ' ';
}
}
}
}
//显示地图的方法
public void showBackground(){
for(int rows = 0 ; rows<HEIGHT ; rows++){
for(int cols = 0 ; cols<WIDTH ; cols++){
System.out.print(background[rows][cols]);
}
System.out.println();
}
}
//刷新游戏的最新状态
public void refresh(){
//把游戏之前的状态先清空
initBackground();
//把蛇最新的状态显示
showSnake();
//显示食物
showFood();
//显示地图
showBackground();
}
public static void main(String[] args) throws Exception {
SnakeGame game = new SnakeGame();
game.initBackground();
//初始化蛇
game.initSnake();
//把蛇的节点反馈到地图上，在对应的位置上画上对应的符号
game.showSnake();
;
//初始化食物
game.createFood();
//显示食物
game.showFood();
//把地图打印出来
game.showBackground();
//让蛇向上移动三步
for(int i= 0 ;i< 3; i++){
game.changeDirection(DIRECTION_UP);
game.move();
game.refresh();
Thread.sleep(1000);
}
//让蛇向下移动三步
for(int i= 0 ;i< 3; i++){
game.changeDirection(DIRECTION_DOWN);
game.move();
game.refresh();
Thread.sleep(1000);
}
}
}

复制代码