World of Zuul

     Dalam projek kali ini saya akan membuat sebuah game yang bernama World of Zuul. World of Zuul merupakan game sederhana yang dimana didalam game ini kita disuruh untuk menentukan arah dalam sebuah map dan kita akan berpindah dari satu tempat ke tempat lainnya. Untuk gambaran game ini yaitu kita akan berada di sebuah lingkungan kampus dengan perintah yang sudah dibuat maka user bisa masuk ke dalam suatu tempat yang ada di kampus tersebut. Perintah yang dibuat merupakan perintah arah mata angin. Class yang dipakai di program ini adalah : 

• Game.java : Class utama dari program ini, segala perintah dari user di eksekusi
• Room.java : Class yang berfungsi untuk menyimpan tempat-tempat yang akan dikunjungi oleh
• CommandWords.java : Class yang berfungsi untuk menentukan apa saja perintah yang bisa digunakan dalam program ini
• Command.java : Class yang berfungsi untuk bagaimana perintah dari CommandWords.java akan di eksekusi
• Parser.java : Class yang berfungsi untuk memasukkan input, membaginya, dan menerjemahkan 

Diagram Class : 

Source Code

Game.java

	public class Game
	{
	private Parser parser;
	private Room currentRoom;
	/**
	* Create the game and initialise its internal map.
	*/
	public Game()
	{
	createRooms();
	parser = new Parser();
	}
	/**
	* Create all the rooms and link their exits together.
	*/
	private void createRooms()
	{
	Room outside, theatre, pub, lab, office;
	// Buat room
	outside = new Room("outside the main entrance of the university");
	theatre = new Room("in a lecture theatre");
	pub = new Room("in the campus pub");
	lab = new Room("in a computing lab");
	office = new Room("in the computing admin office");
	// inisialisasi room exits
	outside.setExits(null, theatre, lab, pub);
	theatre.setExits(null, null, null, outside);
	pub.setExits(null, outside, null, null);
	lab.setExits(outside, office, null, null);
	office.setExits(null, null, null, lab);
	currentRoom = outside; // start game outside
	}
	/**
	* Main play routine. Loops until end of play.
	*/
	public void play()
	{
	printWelcome();
	// Masuk ke loop perintah utama. Di sini kami berulang kali membaca perintah dan
	// jalankan sampai permainan selesai.
	boolean finished = false;
	while (! finished) {
	Command command = parser.getCommand();
	finished = processCommand(command);
	}
	System.out.println("Thank you for playing. Good bye.");
	}
	/**
	* Print out the opening message for the player
	*/
	private void printWelcome()
	{
	System.out.println();
	System.out.println("Welcome to Adventure!");
	System.out.println("Adventure is a new, incredibly boring adventure game.");
	System.out.println("Type 'help' if you need help.");
	System.out.println();
	System.out.println("You are " + currentRoom.getDescription());
	System.out.print("Exits: ");
	if(currentRoom.northExit != null)
	System.out.print("north ");
	if(currentRoom.eastExit != null)
	System.out.print("east ");
	if(currentRoom.southExit != null)
	System.out.print("south ");
	if(currentRoom.westExit != null)
	System.out.print("west ");
	System.out.println();
	}
	/**
	* Given a command, process (that is: execute) the command.
	* If this command ends the game, true is returned,
	* otherwise false is returned.
	*/
	private boolean processCommand(Command command)
	{
	boolean wantToQuit = false;
	if(command.isUnknown()) {
	System.out.println("I don't know what you mean...");
	return false;
	}
	String commandWord = command.getCommandWord();
	if (commandWord.equals("help"))
	printHelp();
	else if (commandWord.equals("go"))
	goRoom(command);
	else if (commandWord.equals("quit"))
	wantToQuit = quit(command);
	return wantToQuit;
	}
	// implementations of user commands:
	/**
	* Print out some help information.
	* Here we print some stupid, cryptic
	* message and a list of the command words
	*/
	private void printHelp()
	{
	System.out.println("You are lost. You are alone. You wander");
	System.out.println("around at the university.");
	System.out.println();
	System.out.println("Your command words are:");
	System.out.println(" go quit help");
	}
	/**
	* Try to go to one direction. If there is an exit, enter
	* the new room, otherwise print an error message
	*/
	private void goRoom(Command command)
	{
	if(!command.hasSecondWord()) {
	// if there is no second word, we don't know where to go...
	System.out.println("Go where?");
	return;
	}
	String direction = command.getSecondWord();
	// Try to leave current room.
	Room nextRoom = null;
	if(direction.equals("north"))
	nextRoom = currentRoom.northExit;
	if(direction.equals("east"))
	nextRoom = currentRoom.eastExit;
	if(direction.equals("south"))
	nextRoom = currentRoom.southExit;
	if(direction.equals("west"))
	nextRoom = currentRoom.westExit;
	if (nextRoom == null)
	System.out.println("There is no door!");
	else {
	currentRoom = nextRoom;
	System.out.println("You are " +
	currentRoom.getDescription());
	System.out.print("Exits: ");
	if(currentRoom.northExit != null)
	System.out.print("north ");
	if(currentRoom.eastExit != null)
	System.out.print("east ");
	if(currentRoom.southExit != null)
	System.out.print("south ");
	if(currentRoom.westExit != null)
	System.out.print("west ");
	System.out.println();
	}
	}
	/**
	* "Quit" was entered. Check the rest of the command to see
	* whether we really quir the game. Return true if this command
	* quits the game, false otherwise.
	*/
	private boolean quit(Command command)
	{
	if(command.hasSecondWord()) {
	System.out.println("Quit what?");
	return false;
	}
	else
	return true; // signal that we want to quit
	}
	}

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Room.java

	public class Room
	{
	public String description;
	public Room northExit;
	public Room southExit;
	public Room eastExit;
	public Room westExit;
	public Room(String description)
	{
	this.description = description;
	}
	public void setExits(Room north, Room east, Room south, Room west)
	{
	if(north != null)
	northExit = north;
	if(east != null)
	eastExit = east;
	if(south != null)
	southExit = south;
	if(west != null)
	westExit = west;
	}
	public String getDescription()
	{
	return description;
	}
	}

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CommandWords.java

	public class CommandWords
	{
	private static final String validCommands[] =
	{
	"go", "quit", "help", "look"
	};
	public CommandWords()
	{
	}
	public boolean isCommand(String aString)
	{
	for(int i = 0;i<validCommands.length;i++)
	{
	if(validCommands[i].equals(aString))
	return true;
	}
	return false;
	}
	}

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Command.java

	public class Command
	{
	private String commandWord;
	private String secondWord;
	public Command(String firstWord, String secondWord)
	{
	commandWord = firstWord;
	this.secondWord = secondWord;
	}
	public String getCommandWord()
	{
	return commandWord;
	}
	public String getSecondWord()
	{
	return secondWord;
	}
	public boolean isUnknown()
	{
	return (commandWord == null);
	}
	public boolean hasSecondWord()
	{
	return (secondWord != null);
	}
	}

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Parser

	import java.io.BufferedReader;
	import java.io.InputStreamReader;
	import java.util.StringTokenizer;
	public class Parser
	{
	private CommandWords commands;
	public Parser()
	{
	commands = new CommandWords();
	}
	public Command getCommand()
	{
	String inputLine = "";
	String word1;
	String word2;
	System.out.print("> ");
	BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
	try
	{
	inputLine = reader.readLine();
	}
	catch(java.io.IOException exc)
	{
	System.out.println("There was an error during reading: " + exc.getMessage());
	}
	StringTokenizer tokenizer = new StringTokenizer(inputLine);
	if(tokenizer.hasMoreTokens())
	word1 = tokenizer.nextToken();
	else
	word1 = null;
	if(tokenizer.hasMoreTokens())
	word2 = tokenizer.nextToken();
	else
	word2 = null;
	if(commands.isCommand(word1))
	return new Command(word1,word2);
	else
	return new Command(null,word2);
	}
	}

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Output