Guess Game w/ Binary Search

/**
 * Simple guessing game with upper and lower bounds. Computer uses a binary search algorithm to find
 * the chosen given number.
 *
 * Created by Steven on 21/10/2014.
 */
public class GuessingGame {
    private final int UPPER_BOUNDS = 100000;
    private final int LOWER_BOUNDS = 0;
    private final int INPUT;

    public GuessingGame(int INPUT) {
        if(INPUT > UPPER_BOUNDS || INPUT < LOWER_BOUNDS) {
            System.err.println("Input was out of bounds. Set to " + (UPPER_BOUNDS/2));
            INPUT = UPPER_BOUNDS/2;
        }
        this.INPUT = INPUT;
    }

    public void doGuesses() {
        int guess = LOWER_BOUNDS-1;

        int searchLength = UPPER_BOUNDS;
        int startIndex = LOWER_BOUNDS;

        int guesses = 0;
        while(guess != INPUT) {
            guess = startIndex + (searchLength/2);
            System.out.println("Guessing: " + guess);
            if(INPUT < guess) {
                searchLength = (searchLength/2);
            } else {
                startIndex += searchLength/2;
                searchLength -= (searchLength/2);
            }

            guesses++;
        }
        System.out.println("Guessed it in " + guesses + " guesses.");
    }
}