Hangman Help!!

Question

hi everyone, im trying to make a hangman program but i have a few iissues first, whenever i ttry to run it, i get an "Exception in thread "main" java.lang.NoSuchMethodError: main" error and i dont know why. secondly,i dont know how to finish the metho replaceLetter. Please help!!!
--Confused Student
import java.util.*;
import java.io.*;
import java.lang.Math;
public class Hangman
private ArrayList<String> wordList;
private String word;
private String guess;
private boolean done = false;
private int numGuess = 0;
public final int MAX_GUESSES = 6;
public final String fileName = "words.txt";
public static void main(String[] args)
  * Creates the Hangman object.
  * Initializes wordList by getting the words from fileName.
  * Initializes word by choosing a word from wordList.
  * Initializes guess as an empty string.
public Hangman() throws FileNotFoundException
   wordList = getWords(fileName);
   word = chooseWord(wordList);
   guess = setEmptyString(word.length());
  * Determines if the game is done or still playing.
  * Returns true if it is won or lost.
  * Returns false otherwise.
  public boolean done()
           if (numGuess >=6)
               return true;
           return false;
  * Determines if the game has been won by guessing the word.
  * One way of determining this is if guess no longer has any "-" .
public boolean won()
  /** Add code here **/
  return false;
  * Determines if the game has been lost.
  * The game is lost if numGuess is MAX_GUESSES
public boolean lost()
            if (numGuess>=MAX_GUESS)
               return true;
            return false;
  * Determines whether the s contains letter.
public boolean has(String s, String letter)
          if (s.indexOf(letter) != -1)
               return true;
       return false;
  * Replaces the letter at index i in s with letter.
  * Does not change s.
  * Returns the new String.
public String replaceLetter(String s, int i, String letter)
  return "";
  * Replaces letter in word with "-"
  * Replaces the corresponding letter in guess with letter.
  * It must account for every instance of letter.
public void addToGuess(String letter)
     Scanner sc = new Scanner(System.in);
     String s = "";
     for(int i = 0; i < word.length(); i++)
          s += "-";
     for(int i = 0; i < word.length(); i++)
  * Prompts the user for a letter.
  * Determines if the word has the letter.
  * If it does, it must add that letter to the guess.
  * Otherwise, it must update the number of incorrect guesses.
  * It then displays the number of guess taken and the number remaining.
public void getGuess()
  System.out.println(guess + "\n");
  System.out.println("Guess a letter");
  Scanner sc = new Scanner(System.in);
  String letter = sc.next().substring(0,1);
  /** Add code here **/
  System.out.println(numGuess + " guesses.");
  System.out.println(MAX_GUESSES - numGuess + " guesses remaining.\n");
  * Returns a string of length size.
  * The string will contain only "-" characters.
public String setEmptyString(int size)
  String empty = "";
  for(int i = 0; i < size; i++)
   empty += "-";
  return empty;
  * Chooses a word from the ArrayList.
  * Returns the chosen word as a String.
  * The word is chosen at random.
public String chooseWord(ArrayList<String> list)
  int index = (int)
  (Math.random()*list.size());
  return list.get(index);
  * Gets a list of words from the given file.
  * Returns the list as an ArrayList of Strings.
public ArrayList<String> getWords(String fileName) throws
FileNotFoundException
  Scanner file = new Scanner(new File(fileName));
  ArrayList<String> words = new ArrayList<String>();
  while(file.hasNextLine())
   words.add(file.nextLine());
  return words;
  * Repeatedly calls getGuess until the game is done.
  * When the game is done, it displays an appropriate message.
public void playGame()
       while(!done())
       getGuess();
     if (won())
          System.out.println("You won!");
     else
          System.out.println("Sorry, you lose.");
/**Ralph Jones Jr**/

Answer 1

In your main() method, first create an object of your class Hangman and invoke methods on it. Something link this...
try{
       new Hangman().getGuess();
  }catch(FileNotFoundException f){System.out.println(f);}Since Hangman() constructor throws FileNotFoundException, you need try-catch for creating your Hangman object.