About this question
Hangman game coded in Java (at a beginner's level) where Hangman.java can be run with one or more arguments.
Hangman.java:
package hangman;
import hangman.Game;
import hangman.Prompter;
public class Hangman {
public static String normalizeArgs(String[] array) {
String result = "";
switch (array.length) {
case 0:
System.out.println("Usage: java Hangman"); System.err.println("answer is required");
System.exit(1);
break;
case 1:
result = array[0];
break;
default:
for (int i = 0; i < array> result += array[i];
if (i != array.length-1) {
result += ' ';
}
}
}
return result;
}
public static void main(String[] args) {
Game game = new Game(normalizeArgs(args));
Prompter prompter = new Prompter(game);
while (game.getRemainingTries() > 0 && !game.isWon()) {
prompter.displayProgress();
prompter.promptForGuess();
}
prompter.displayOutcome();
}
}
Prompter.java:
package hangman;
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.printf("Enter a letter: ");
String guessInput = scanner.nextLine().toLowerCase();
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("You have %d tries left to solve: %s%n",
game.getRemainingTries(),
game.getCurrentProgress());
}
public void displayOutcome() {
if (game.isWon()) {
System.out.printf("Congratulations! You won with %d tries left.%n", game.getRemainingTries());
} else {
System.out.printf("Bummer! The word was %s. :(%n", game.getAnswer());
}
}
}
Game.java:
package hangman;
public class Game {
public static final int MAX_TRIES = 7;
private String answer;
private String hits;
private String misses;
public Game(String answer) {
this.answer = answer.toLowerCase();
hits = "";
misses = "";
}
private chat normalizeGuess(char letter) {
if (!Character.isLetter(letter)) {
throw new IllegalArgumentException("Guess is not a letter");
}
if (hits.indexOf(letter) != -1 || misses.indexOf(letter) != -1) {
throw new IllegalArgumentException("Letter already guessed");
}
return letter;
}
public boolean applyGuess(String letters) {
if (letters.length() == 0) {
throw new IllegalArgumentException("No letters found");
}
return applyGuess(letters.charAt(0));
}
public boolean applyGuess(char letter) {
normalizeGuess(letter);
boolean isHit = answer.indexOf(letter) != -1;
if (isHit) {
hits += letter;
} else {
misses += letter;
}
return isHit;
}
public int getRemainingTries() {
return MAX_TRIES - misses.length();
}
public String getCurrentProgress() {
String progress = "";
for (char letter : answer.toCharArray()) {
if (hits.indexOf(letter) != -1) {
progress += letter;
} else if (letter == ' ') {
progress += ' ';
} else {
progress += '-';
}
}
return progress;
}
public boolean isWon() {
return getCurrentProgress().indexOf('-') == -1;
}
public String getAnswer() {
return answer;
}
}
