Question

For this assignment, you will create a command-line version of the game Hangman.

For this assignment you will research on StringBuilder Class (Use this link) and use it in your code.

Please finish the program in Java Language

Your game should have a list of at least ten phrases of your choosing (appropriate to all audiences please!) The game chooses a random phrase from the list. This is the phrase the player tries to guess. (10)

● The phrase is hidden-- all letters are replaced with asterisks. Spaces and punctuation are left unhidden. So if the phrase is "Joe Programmer", the initial partially hidden phrase is: *** ********** (15)

● The user guesses a letter. All occurrences of the letter in the phrase are replaced in the partially hidden phrase. For our example, if the user guessed "o", the new partially hidden phrase would change to: * o * ** o******* 15

● Allow the phrases and guesses to include lowercase and uppercase letters and digits. If a guess is not a letter or digit (e.g., ‘%’) the user should be notified but not penalized a miss. 10

● If the guessed letter does not occur in the phrase, the user is notified of the miss and how many misses/chances are left. 10

● The user should NOT be penalized for guessing a previously correct or incorrect guess, but should be notified. 10

● If the user misses 8 times, they lose and the game is over. If all letters in the phrase are guessed, the user wins! 10

● Provide a reasonable user interface such that the players is given instructions on how to play and it is clear how to proceed at each step. Test this out by performing a usability test with at least two people! 10

Coding Specifications

● Define the ten phrases as an array of Strings. ○ String phraseList[] = {"cats and dogs", "stephen curry"};

○ then phraseList[0] will give "cats and dogs" and phraseList[1] will give "stephen curry".

● Define the randomly chosen phrase as a String

● Define the hidden phrase as a StringBuilder, because you will be changing it as the game is played. ● You need not define other methods other than main

Answer 1

// Hangman.java : Java program to simulate the game of Hangman

import java.util.ArrayList;

import java.util.Random;

import java.util.Scanner;

public class Hangman {

       public static void main(String[] args) {

            

             // array of 10 phrases

             String phraseList[] = {"cats and dogs", "stephen curry", "twinkling eyes", "roses are red", "sharing is caring", "happy go lucky"

                           , "win some lose some", "all that shine is not gold", "life is good", "good morning"};

             // maximum allowed attempts

             int max_attempts = 8;

             int attempts = 0; // number of wrong attempts

             // list of guessed characters

             ArrayList<Character> guessed_letters = new ArrayList<Character>();

             char guess;

             Scanner scan = new Scanner(System.in);

            

             Random ran = new Random();

             // randomly select a phrase

             int index = ran.nextInt(phraseList.length);

            

             // create the hidden phrase for display purpose

             StringBuilder hidden = new StringBuilder();

             for(int i=0;i<phraseList[index].length();i++)

             {

                    if((phraseList[index].charAt(i) >='A' && phraseList[index].charAt(i) <='Z') ||

                                 (phraseList[index].charAt(i) >='a' && phraseList[index].charAt(i) <='z') || (phraseList[index].charAt(i) >='0' && phraseList[index].charAt(i) <='9'))

                           hidden.append('*');

                    else

                           hidden.append(phraseList[index].charAt(i));

             }

            

             System.out.println("Welcome to Hangman game!!!");

             System.out.println("The goal of the user is to guess the phrase selected by the computer.\n"

                          + "At each step, the user guesses a letter( lowercase and uppercase letters and digits allowed) , the computer checks if the letter is present in the phrase or not.\n"

                          + "If the letter is present, all occurrences of the letter is revealed else user is penalized for the guess.\nUser has a maximum of 8 attempts to guess the phrase ");

            

             // loop that continues till all the attempts are exhausted or user has guessed the phrase

             while(attempts < max_attempts)

             {

                    System.out.println("\nHidden Phrase : "+hidden.toString());

                    System.out.println("Attempts Left : "+(max_attempts - attempts));

                    System.out.print("Enter a guess : ");

                    // input of guess

                    guess = scan.nextLine().charAt(0);

                    // check if guess is valid

                    if((guess >='A' && guess <='Z') ||

                                 (guess >='a' && guess <='z') || ( guess >='0' && guess <='9'))

                    {

                           // check if this letter has already been guessed

                           if(guessed_letters.contains(guess))

                           {

                                 System.out.println("You have already guessed this letter");

                           }else

                           {

                                 guessed_letters.add(guess); // add to the guessed_letters list, if not guesses earlier

                                 // check if phrase contains this letter, then update the hidden phrase

                                 if(phraseList[index].contains(guess+""))

                                 {

                                        for(int i=0;i<phraseList[index].length();i++)

                                        {

                                               if(phraseList[index].charAt(i) == guess)

                                                     hidden.setCharAt(i, guess);

                                        }

                                 }else

                                 {

                                        attempts++; //else increase the number of attempts

                                        System.out.println(guess+" not present in the phrase");

                                 }

                           }

                    }else

                    {

                           System.out.println("Invalid guess. Valid letters are uppercase and lowercase letters and digits");

                    }

                   

                    // check if user has guessed the phrase

                    if(hidden.toString().equals(phraseList[index]))

                           break;

             }

            

             // check if user had guessed the phrase or not at the end

             if(hidden.toString().equals(phraseList[index]))

                    System.out.println("Congratulations!!! You won");

             else

                    System.out.println("Sorry you lose!");

             System.out.println("The phrase was : "+phraseList[index]);

             scan.close();                 

       }

}

//end of program

Output: