GuessingGame.java

import java.util.Random;
/**
 * Guess a secret number between 1 and an upper	bound.
 *
 *
 */
public class GuessingGame {
	/**	upper bound	for	secret number */
	private	int	secret;
	/**	the	secret number */
	private	int	upperBound;
	/**	hint for most recent guess */
	private	String message;

	/**	Initialize a new game with a default upperbound. */
	public GuessingGame()
	{
		this.upperBound = 100;
		secret = getRandomNumber(this.upperBound);
		String hint = "I'm	thinking of	a number between 1 and "+upperBound;
		setMessage( hint );
	}


	/**
	 * Get a random	number between 1 and limit.
	 * @param limit	is the upper limit for the random number.
	 * @return a random	integer
	 */
	private	int	getRandomNumber(int	limit) {
		// use a seed so the random	numbers	are	not	repeatable
		long seed =	System.nanoTime( );
		Random rand	= new Random(seed);
		return 1 + rand.nextInt(limit);
	}

	/**
	 * Evaluate	a guess.
	 * @param number is	a guess	of the secret number.
	 * @return true	if the guess is	correct, false otherwise.
	 */
	public boolean guess(int number) {
		message = makeHint(number, secret);
		return (number == secret);
	}

	/**
	 * Get a message (hint) based on most recent guess.
	 * If nothing has been guessed yet then	the	hint
	 * describes the game.
	 * @return a message about game or most recent guess
	 */
	public String getMessage()	{
		return this.message;
	}

	/**	Get	the	game upper bound for the secret	number.	
     */
	public int getUpperBound() {
		return this.upperBound;
	}

	public void setMessage(String msg) {
		this.message = msg;
	}

	/**
	 * Create a	hint based on the last guess.
	 * @param number is	the	most recent	guess
	 * @param secret is	the	secret number
	 */
	protected String makeHint(int number, int secret) {
		if (number == secret) {
			return "Correct!";
		}
		else if	(number-secret < -upperBound/4	)
			return "WAY	too	small, dude.";
		else if	(number	< secret)
			return "Too	small.";
		else if	(number-secret > upperBound/4 )
			return "WAY	too	large, man.";
		else return	"Too large.";
	}
}