java.util.NoSuchElementException

public class Game {
    private String mAnswer;
    private String mHits;
    private String mMisses;

    public Game(String answer) {
        mAnswer = answer;
        mHits = "";
        mMisses = "";
    }
}

public boolean applyGuess(char letter) {
    boolean isHit = mAnswer.indexOf(letter) >= 0;

    if (isHit) {
        mHits += letter;
    }
    else {
        mMisses += letter;
    }
    return isHit;
}