***14.17 (Game: hangman) Rewrite Exercise 9.25. The program reads the words stored in a text file named hangman.txt. Words are delimited by spaces.

Exercise14_17.java

import java.util.*;
import java.io.*;

public class Test {

    public static void main(String[] args) throws Exception {
        
        File file = new File("hangman.txt");
        Scanner input = new Scanner(file);
        List<String> words = new ArrayList<>();
        
        while (input.hasNext()) {
            words.add(input.next());
        }
        
        int randomIndex = (int) (Math.random() * words.size());
        String s = words.get(randomIndex);
        char[] charsToDisplay = new char[s.length()];
        
        for (int i = 0; i < s.length(); i++)
            charsToDisplay[i] = '*';
        
        char[] chars = s.toCharArray();        
        int count = 0;
        
        while (true) {
            Scanner consoleInput = new Scanner(System.in);
            
            System.out.print("(Guess) Enter a letter in word " + 
                    String.valueOf(charsToDisplay) + ": ");
            char letter = consoleInput.next().charAt(0);
            
            switch (isLetterExists(chars, charsToDisplay, letter)) {
                case 1: System.out.println("       " + letter + 
                        " is already in the word");
                break;
                case 2: System.out.println("       " + letter + " is not in the word");
                        count++;
            }
            
            boolean isDone = true;
            
            for (int i = 0; i < charsToDisplay.length; i++) {
                if (charsToDisplay[i] == '*') {
                    isDone = false;
                    break;
                }
            }            
            
            if (isDone) {
                System.out.println(
                                "       The word is " + 
                                String.valueOf(charsToDisplay) + 
                                ". You missed " + 
                                count + (count > 1? " times": " time"));
                
                System.out.print("Do you want to guess another word? Enter y or n> ");
                char ch = consoleInput.next().charAt(0);
                if (ch == 'n')
                    break;
            }
        }
    }
    
    static int isLetterExists(char[] chars, char[] charsToDisplay, char letter) {
        for (int i = 0; i < chars.length; i++) {
            if (letter == chars[i]) {
                chars[i] = ' ';
                charsToDisplay[i] = letter;
                return 0;
            }
        }
        
        for (int i = 0; i < chars.length; i++)
            if (letter == charsToDisplay[i])
                return 1;
        
        return 2;
    }

}