Class Command

java.lang.Object
  Command

public class Command
extends Object

This class is part of the "World of Zuul" application. "World of Zuul" is a very simple, text based adventure game. This class holds information about a command that was issued by the user. A command currently consists of two parts: a CommandWord and a string (for example, if the command was "take map", then the two parts are TAKE and "map"). The way this is used is: Commands are already checked for being valid command words. If the user entered an invalid command (a word that is not known) then the CommandWord is UNKNOWN. If the command had only one word, then the second word is .

Version:

2006.03.30

Author:

Michael Kolling and David J. Barnes

Constructor Summary

Command(CommandWord commandWord, String secondWord)
Create a command object.

Method Summary

CommandWord	getCommandWord() Return the command word (the first word) of this command.
String	getSecondWord()
boolean	hasSecondWord()
boolean	isUnknown()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Command

public Command(CommandWord commandWord,
               String secondWord)

Create a command object. First and second words must be supplied, but the second may be null.

Parameters:

commandWord - The CommandWord. UNKNOWN if the command word was not recognised.

secondWord - The second word of the command. May be null.

Method Detail

getCommandWord

public CommandWord getCommandWord()

Return the command word (the first word) of this command.

Returns:

The command word.

getSecondWord

public String getSecondWord()

Returns:

The second word of this command. Returns null if there was no second word.

hasSecondWord

public boolean hasSecondWord()

Returns:

true if the command has a second word.

isUnknown

public boolean isUnknown()

Returns:

true if this command was not understood.