Java城堡游戏

在城堡中，走不同的门进入不同的房间（emm也没有太多功能玩法）

Game.java

package castle;

import java.util.HashMap;
import java.util.Scanner;

public class Game {
	public Room currentRoom;
	private HashMap<String, Handler> handlers = new HashMap<String, Handler>();
	
	public Game()
	{
		createRooms();
		handlers.put("go", new HandlerGo(this));
		handlers.put("bye", new HandlerBye(this));
		handlers.put("help", new HandlerHelp(this));
	}
	
	private void createRooms()
	{
		Room outside, lobby, pub, study, bedroom;
		
		//制造房间
		outside = new Room("城堡外");
		lobby = new Room("大堂");
		pub = new Room("小酒吧");
		study = new Room("书房");
		bedroom = new Room("卧室");
		
		//初始化房间的出口
		outside.setExit("east", lobby);
		outside.setExit("south", study);
		outside.setExit("west", pub);
		lobby.setExit("west", outside);
		pub.setExit("east", outside);
		study.setExit("north", outside);
		study.setExit("east", bedroom);
		bedroom.setExit("west", study);
		lobby.setExit("up", pub);
		pub.setExit("down", lobby);
		
		currentRoom = outside;//从城堡门外开始
	}
	
	private void printWelcome() {
		System.out.println();
		System.out.println("欢迎来到城堡！");
		System.out.println("这是一个超级无聊的游戏。");
		System.out.println("如果需要帮助，请输入‘help’。");
		System.out.println();
		showPrompt();		
	}
	
	//以下为用户命令
	public void goRoom(String direction) {
		Room nextRoom = null;		
		nextRoom = currentRoom.getExit(direction);
		
		if(nextRoom == null)
			System.out.println("那里没有门！");
		else
		{
			currentRoom = nextRoom;
			showPrompt();
		}	
	}
	
	public void showPrompt() {
		System.out.println("现在你在" + currentRoom);
		System.out.print("出口有：");
		System.out.print(currentRoom.getExitDesc());
		System.out.println();
	}
	
	public void play() {
		Scanner in = new Scanner(System.in);
		
		while(true) {
			String line = in.nextLine();
			String[] words = line.split(" ");
			Handler handler = handlers.get(words[0]);
		    String value = "";
		    if(words.length > 1)
		    	value = words[1];
			if(handler != null) {
				handler.doCmd(value);
				if(handler.isBye())
					break;
			}
		}
		in.close();
	}
	

	public static void main(String[] args) {		
		Game game = new Game();
		game.printWelcome();
		game.play();
		
		System.out.println("感谢您的光临。再见！");
	}
}

Handler.java

package castle;

public class Handler {
	protected Game game;
	
	public Handler(Game game) {
		this.game = game;
	}
	public void doCmd(String word) {}
	public boolean isBye() {return false;}
}

HandlerBye.java

package castle;

public class HandlerBye extends Handler{
	public HandlerBye(Game game) {
		super(game);
	}

	@Override
	public boolean isBye() {
		return true;
	}
}

HandlerGo.java

package castle;

public class HandlerGo extends Handler{
	public HandlerGo(Game game) {
		super(game);
	}

	@Override
	public void doCmd(String word) {
		game.goRoom(word);
	}
}

HandlerHelp.java

package castle;

public class HandlerHelp extends Handler{
	public HandlerHelp(Game game) {
		super(game);
	}

	@Override
	public void doCmd(String word) {
		System.out.println("迷路了吗？你可以做的命令有：go bye help     ");
		System.out.println("如：go east");
	}
}

Room.java

package castle;

import java.util.HashMap;

public class Room {
	private String description;
	private HashMap<String, Room> exits = new HashMap<String, Room>(); 
	
	public Room(String description)
	{
		this.description = description;
	}
	
	public void setExit(String dir, Room room) {
		exits.put(dir, room);
	}
	
	public String getExitDesc() {
		StringBuffer sb = new StringBuffer();
		for(String dir : exits.keySet())
		{
			sb.append(dir);
			sb.append(' ');
		}
		return sb.toString();	
	}
	
	public Room getExit(String direction) {
		return exits.get(direction);
	}

	@Override
	public String toString() 
	{
		return description;
	}
}