I need finished Hangman game

public class Hangman {
    public static void main(String[] args) {
        if(args.length == 0) {
            System.out.println("Please enter a word");
            System.exit(0);
        }
        Game game = new Game(args[0]);
        Prompter prompter = new Prompter(game);
        prompter.play();
    }
}

public class Game {
    public static final int MAX_MISSES = 7;
    private String mAnswer;
    private String mHits;
    private String mMisses;

    public Game(String answer) {
        mAnswer = answer;
        mHits = "";
        mMisses = "";
    }
    private char validateGuess(char letter) {
        if(! Character.isLetter(letter)) {
            throw new IllegalArgumentException("A letter is required");
        }
        letter = Character.toLowerCase(letter);
        if(mMisses.indexOf(letter) >= 0 || mHits.indexOf(letter) >= 0) {
            throw new IllegalArgumentException(letter + " has already been guessed");
        }
        return letter;
    }
    public boolean applyGuess(String letters) {
        if(letters.length() == 0) {
            throw new IllegalArgumentException("No letter found");
        }
        return applyGuess(letters.charAt(0));
    }
    public boolean applyGuess(char letter) {
        letter = validateGuess(letter);
        boolean isHit = mAnswer.indexOf(letter) >= 0;
        if(isHit) {
            mHits += letter;
        } else {
            mMisses += letter;
        }
        return isHit;
    }
    public String getCurrentProgress() {
        String progress = "";
        for(char letter : mAnswer.toCharArray()) {
            char display = '-';
            if(mHits.indexOf(letter) >= 0) {
                display = letter;
            }
            progress += display;
        }
        return progress;
    }
    public int getRemainingTries() {
        return MAX_MISSES - mMisses.length();
    }
    public String getAnswer() {
        return mAnswer;
    }
    public boolean isSolved() {
        return getCurrentProgress().indexOf('-') == -1;
    }
}

import java.io.Console;

public class Prompter {
    private Game mGame;
    public Prompter(Game game) {
        mGame = game;
    }
    public void play() {
        while(mGame.getRemainingTries() > 0 && !mGame.isSolved()) {
            displayProgress();
            promptForGuess();
        }
        if(mGame.isSolved()) {
            System.out.printf("Congratulations, you won with %d tries remaining.\n", 
                mGame.getRemainingTries());
        } else {
            System.out.printf("Bummer the word was %s.  :(\n",
                mGame.getAnswer());
        }
    }
    public boolean promptForGuess() {
        Console console = System.console();
        boolean isHit = false;
        boolean isValidGuess = false;
        while(! isValidGuess) {
            String guessAsString = console.readLine("Enter a letter:  ");
            try {
                isHit = mGame.applyGuess(guessAsString);
                isValidGuess = true;
            } catch (IllegalArgumentException iae) {
                console.printf("%s. Please try again.\n", iae.getMessage());
            }
        }
        return isHit;
    }
    public void displayProgress() {
        System.out.printf("You have %d tries left to solve: %s\n",
                                    mGame.getRemainingTries(), 
                                    mGame.getCurrentProgress());
    }
}