Modified Code Game.javaimport java.util.;public class Game.pdf

Modified Code: Game.java:
-import java.util.*;
public class Game
{
private Parser parser;
private Room currentRoom;
private Stack route;
/**
* Create the game and initialize its internal map.
*/
public Game()
{
createRooms();
parser = new Parser();
route=new Stack();
}
/**
* Create all the rooms and link their exits together.
*/
private void createRooms()
{
Room outside, theatre, pub, lab, office, basement;
// create the rooms
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");
basement = new Room("in the basement");
// initialise room exits
outside.setExit("east", theatre);
outside.setExit("south", lab);
outside.setExit("west", pub);

theatre.setExit("west", outside);
pub.setExit("east", outside);
lab.setExit("north", outside);
lab.setExit("east", office);
lab.setExit("down", basement);
basement.setExit("up", lab);
office.setExit("west", lab);
currentRoom = outside; // start game outside
}
/**
* Main play routine. Loops until end of play.
*/
public void play()
{
printWelcome();
// Enter the main command loop. Here we repeatedly read commands and
// execute them until the game is over.
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 the World of Zuul!");
System.out.println("World of Zuul is a new, incredibly boring adventure game.");

System.out.println("Type 'help' if you need help.");
System.out.println(currentRoom.getLongDescription());
}
/**
* 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("back")) {
goBack();
}
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("Your command words are:");
parser.showCommands();
}
/**
* 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 = currentRoom.getExit(direction);
if (nextRoom == null)
System.out.println("There is no door!");
else
{
route.push(currentRoom);
currentRoom = nextRoom;
}
}
//Try to go to the previous room

private void goBack()
{
//Check if route exist
if(route.isEmpty())
{
/*If route doesnot exist. Stay to the current room itself */
System.out.println("No direction");
return;
}
//If route exist
else
{
//Store the currentRoom
Room tt=currentRoom;
//Go to the previous room
currentRoom=route.pop();
//Store the previous current room
route.push(tt);
//Get currentRoom description System.out.println(currentRoom.getLongDescription());
}
}
/**
* "Quit" was entered. Check the rest of the command to see
* whether we really quit 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
}

}
Solution
Modified Code: Game.java:
-import java.util.*;
public class Game
{
private Parser parser;
private Room currentRoom;
private Stack route;
/**
* Create the game and initialize its internal map.
*/
public Game()
{
createRooms();
parser = new Parser();
route=new Stack();
}
/**
* Create all the rooms and link their exits together.
*/
private void createRooms()
{
Room outside, theatre, pub, lab, office, basement;
// create the rooms
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");
basement = new Room("in the basement");
// initialise room exits

outside.setExit("east", theatre);
outside.setExit("south", lab);
outside.setExit("west", pub);
theatre.setExit("west", outside);
pub.setExit("east", outside);
lab.setExit("north", outside);
lab.setExit("east", office);
lab.setExit("down", basement);
basement.setExit("up", lab);
office.setExit("west", lab);
currentRoom = outside; // start game outside
}
/**
* Main play routine. Loops until end of play.
*/
public void play()
{
printWelcome();
// Enter the main command loop. Here we repeatedly read commands and
// execute them until the game is over.
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("Welcome to the World of Zuul!");
System.out.println("World of Zuul is a new, incredibly boring adventure game.");
System.out.println("Type 'help' if you need help.");
}
/**
* 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("back")) {
goBack();
}
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("Your command words are:");
parser.showCommands();
}
/**
* 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 = currentRoom.getExit(direction);
if (nextRoom == null)
System.out.println("There is no door!");
else
{
route.push(currentRoom);
currentRoom = nextRoom;

}
}
//Try to go to the previous room
private void goBack()
{
//Check if route exist
if(route.isEmpty())
{
/*If route doesnot exist. Stay to the current room itself */
System.out.println("No direction");
return;
}
//If route exist
else
{
//Store the currentRoom
Room tt=currentRoom;
//Go to the previous room
currentRoom=route.pop();
//Store the previous current room
route.push(tt);
//Get currentRoom description System.out.println(currentRoom.getLongDescription());
}
}
/**
* "Quit" was entered. Check the rest of the command to see
* whether we really quit 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
}
}

Modified Code Game.javaimport java.util.;public class Game.pdf

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