cmd版贪吃蛇

import java.awt.*;
import java.util.LinkedList;
import java.util.Scanner;
/**
 * @author aachen0
 * @date 2018/3/27 13:56
 * IDE:IntelliJ IDEA
 */
public class SnakeGame {
   static final int WIDTH = 40, HEIGHT = 10;
   static char[][] map = new char[HEIGHT][WIDTH];
   public static void main(String[] args) {
      SnakeGame snakeGame = new SnakeGame();
      snakeGame.initBackground();//初始化背景，放只虫子
      SnakeLine snakeLine = new SnakeLine();
      snakeLine.initSnake();//初始化一条蛇
      snakeGame.putSnakeInMap(snakeLine);
      snakeGame.show();//显示一下
      //键盘移动蛇进行游戏
      Scanner scanner = new Scanner(System.in);
      int move;
      while (true) {
         System.out.println("输入AWSD控制蛇的移动，Q退出游戏");
         String choice = scanner.next();
         switch (choice) {
            case "a":
            case "A":
               move = 2;
               break;
            case "s":
            case "S":
               move = 1;
               break;
            case "w":
            case "W":
               move = 3;
               break;
            case "d":
            case "D":
               move = 0;
               break;
            case "q":
            case "Q":
               int points=snakeLine.snakePoints.size();
               snakeGame.putGameOverInMap(points);
            default:
               System.out.println("输入有误，请重试");
               continue;
         }
         if (snakeLine.move(move) == -1) {
            snakeGame.putGameOverInMap(snakeLine.snakePoints.size());
            snakeGame.show();
            break;
         }
         snakeGame.putSnakeInMap(snakeLine);
         snakeGame.show();
      }
   }
   //用字符画背景
   private void initBackground() {
      for (int i = 0; i < HEIGHT; i++) {//外围控制行
         for (int j = 0; j < WIDTH; j++) {//内循环控制各行的第几个
            this.map[i][j] = (j == 0 || (j == WIDTH - 1) || i == 0 || (i == HEIGHT - 1)) ? '*' : ' ';
         }
      }
   }
   //显示背景
   public void show() {
      int height = map.length;
      int width = map[0].length;
      for (int i = 0; i < height; i++) {
         for (int j = 0; j < width; j++) {
            System.out.print(map[i][j]);
         }
         System.out.println();
      }
   }
   //把加到地图
   void putSnakeInMap(SnakeLine snakeLine) {
      Point p;
      this.initBackground();
      map[SnakeLine.food.y][SnakeLine.food.x] = SnakeLine.worm;
      for (int i = 0; i < snakeLine.snakePoints.size(); i++) {
         p = snakeLine.snakePoints.get(i);
         if (p.y > 0 && p.y < HEIGHT - 1 && p.x > 0 && p.x < WIDTH - 1) {
            map[p.y][p.x] = (i == 0) ? snakeLine.head : snakeLine.body;
         } else {
            putGameOverInMap(snakeLine.snakePoints.size());
         }
      }
   }
   void putGameOverInMap(int points) {
      char[] gameOver = ("GameOver Score:"+(points-3)).toCharArray();
      for (int i = 0; i < gameOver.length; i++) {
         map[HEIGHT / 2 - 1][i + (WIDTH - gameOver.length) / 2] = gameOver[i];
      }
      show();
      System.exit(1);
   }
}
class SnakeLine {
   static final int RIGHT = 0, DOWN = 1, LEFT = 2, UP = 3;
   static final char head = 'O', body = 'o', worm = '~';//头和身体表示
   static Point food = new Point((int) (Math.random() * (SnakeGame.WIDTH - 2)) + 1, (int) (Math.random() * (SnakeGame.HEIGHT - 2)) + 1);
   private void newFood() {
      food = new Point((int) (Math.random() * (SnakeGame.WIDTH - 2)) + 1, (int) (Math.random() * (SnakeGame
            .HEIGHT - 2)) + 1);
   }
   LinkedList<Point> snakePoints = new LinkedList<>();//蛇的身体内容
   void initSnake() {
      Point head = new Point(SnakeGame.WIDTH / 2, SnakeGame.HEIGHT / 2);
      snakePoints.addFirst(head);//头
      snakePoints.addLast(new Point(head.x - 1, head.y));
      snakePoints.addLast(new Point(head.x - 2, head.y));
   }
   int move(int orient) {
      Point p = snakePoints.getFirst();
      Point np = null;
      switch (orient) {
         case SnakeLine.RIGHT:
            np = new Point(p.x + 1, p.y);
            break;
         case SnakeLine.LEFT:
            np = new Point(p.x - 1, p.y);
            break;
         case SnakeLine.DOWN:
            np = new Point(p.x, p.y + 1);
            break;
         case SnakeLine.UP:
            np = new Point(p.x, p.y - 1);
            break;
      }
      if (snakePoints.contains(np)) {
         return -1;//咬到自己了
      }
      snakePoints.addFirst(np);
      if (np.equals(food)) {//吃到食物了
         newFood();
         return 2;
      }
      snakePoints.removeLast();
      return 1;
   }
}