PBO-C 6 : CommandWords()

public class CommandWords
{
    private static final String[] validCommands = {"go", "quit", "help", "look"};

    public boolean isCommand(String aString)
    {
        for(int i = 0; i < validCommands.length; i++)
        {
            if(validCommands[i].equals(aString))
                return true;
        }
        return false;
    }
}