Error: Incompatible types - String cannot be converted to char char display = "-";

Hangman.java

public class Hangman {

public static void main(String[] args) { // Your incredible code goes here... Game game = new Game("treehouse"); Prompter prompter = new Prompter(game); prompter.displayProgress(); boolean isHit = prompter.promptForGuess(); if (isHit){ System.out.println("We got a hit!"); } else { System.out.println("Oops missed"); } prompter.displayProgress(); } }

Prompter.java

import java.util.Scanner;

class Prompter { private Game game;

public Prompter(Game game) { this.game = game; }

public boolean promptForGuess () { Scanner scanner = new Scanner(System.in); System.out.print("Enter a letter: "); String guessInput = scanner.nextLine(); char guess = guessInput.charAt(0); return game.applyGuess(guess); }

public void displayProgress() { System.out.printf("Try to solve: %s%n",game.getCurrentProgress()); } }

Game.java

class Game { private String answer; private String hits; private String misses;

public Game(String answer) { this.answer = answer; hits = " "; misses = " "; } public boolean applyGuess (char letter){ boolean isHit = answer.indexOf(letter) != -1; if(isHit) { hits+=letter; } else { misses += letter; } return isHit;
} public String getCurrentProgress(){ String progress = ""; for( char letter : answer.toCharArray()){ char display = "-"; if (hits.indexOf(letter) != -1){ display = letter; } progress += display;

} return progress; } }

Console shows the error - Incompatible types: String cannot be converted to char. I don't understand this, please help.