74 lines
2.0 KiB
Java
Executable File
74 lines
2.0 KiB
Java
Executable File
/**
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* This class is part of the "World of Zuul" application.
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* "World of Zuul" is a very simple, text based adventure game.
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*
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* This class holds information about a command that was issued by the user.
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* A command currently consists of two strings: a command word and a second
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* word (for example, if the command was "take map", then the two strings
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* obviously are "take" and "map").
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*
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* The way this is used is: Commands are already checked for being valid
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* command words. If the user entered an invalid command (a word that is not
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* known) then the command word is <null>.
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*
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* If the command had only one word, then the second word is <null>.
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*
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* @author Michael Kölling and David J. Barnes
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* @version 2016.02.29
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*/
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public class Command
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{
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private String commandWord;
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private String secondWord;
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/**
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* Create a command object. First and second word must be supplied, but
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* either one (or both) can be null.
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* @param firstWord The first word of the command. Null if the command
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* was not recognised.
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* @param secondWord The second word of the command.
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*/
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public Command(String firstWord, String secondWord)
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{
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commandWord = firstWord;
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this.secondWord = secondWord;
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}
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/**
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* Return the command word (the first word) of this command. If the
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* command was not understood, the result is null.
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* @return The command word.
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*/
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public String getCommandWord()
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{
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return commandWord;
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}
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/**
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* @return The second word of this command. Returns null if there was no
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* second word.
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*/
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public String getSecondWord()
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{
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return secondWord;
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}
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/**
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* @return true if this command was not understood.
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*/
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public boolean isUnknown()
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{
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return (commandWord == null);
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}
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/**
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* @return true if the command has a second word.
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*/
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public boolean hasSecondWord()
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{
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return (secondWord != null);
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}
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}
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