How do we set the "Answer" in an IDE? I have Intellij and if I run my code it just says answer is required.

Thankyou!

What's the "err" in you and its function? I'm getting the same error message compiling in IntelliJ Even after I read that article and got my code to run in, same message appears without allowing me to input a value.

public class Hangman{

public static void main(String[] args){ if(args.length == 0){ System.out.println("Usage: java Hangman <answer>"); System.out.println("answer is required"); System.exit(1); } Game game = new Game(args[0]); Prompter prompter = new Prompter(game); while(game.getRemainingTries() > 0 && !game.isWon()){ prompter.displayProgress(); prompter.promptForGuess(); } prompter.displayOutcome(); } }

import java.util.Scanner;

public class Prompter { private Game game;

public Prompter(Game game){ this.game = game; } public boolean promptForGuess(){ Scanner scanner = new Scanner(System.in); boolean isHit = false; boolean isAcceptable = false; do { System.out.print("Enter a letter: "); String guessInput = scanner.nextLine(); try { isHit = game.applyGuess(guessInput); isAcceptable = true; } catch (IllegalArgumentException iae) { System.out.printf("%s. Please try again.%n", iae.getMessage()); } } while(!isAcceptable); return isHit; } public void displayProgress(){ System.out.printf("Try to %d to solve: %s%n", game.getRemainingTries(), game.getCurrentProgress()); } public void displayOutcome(){ if (game.isWon()) { System.out.printf("Congratulation! you won with %d tries remaining.%n", game.getRemainingTries()); } else { System.out.printf("Sorry, the answer was %s.%n", game.getAnswer()); }

} } public class Game { public static final int MAX_MISSES = 7; private String answer; private String hits; private String misses;

private char normalizeGuess(char letter){
    if(! Character.isLetter(letter)){
        throw new IllegalArgumentException("a letter is required");
    }
    letter = Character.toLowerCase(letter);
    if (misses.indexOf(letter) != -1 || hits.indexOf(letter) != -1 ){
        throw new IllegalArgumentException(
                letter + " has already been guessed! Pick another letter.");
    }
    return letter;
}

public Game(String answer){
   this.answer = answer.toLowerCase();
   hits = "";
   misses = "";
}

public String getAnswer(){
    return answer;
}

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 = normalizeGuess(letter);
    boolean isHit = answer.indexOf(letter) != -1;
    if(isHit){
        hits += letter;
    }else{
        misses += letter;
    }
    return isHit;
}
public int getRemainingTries(){
    return MAX_MISSES - misses.length();
}
public String getCurrentProgress(){
    String progress = "";
    for(char letter: answer.toCharArray()){
        char display = '-';
        if(hits.indexOf(letter) != -1){
            display = letter;
        }
        progress += display;
    }
        return progress;
}
public boolean isWon(){
    return getCurrentProgress().indexOf('-') == -1;
}

}