Hangman.java

/*
 * File: Hangman.java
 * ------------------
 * This program will eventually play the Hangman game from
 * Assignment #4.
 */

import acm.graphics.*;
import acm.program.*;
import acm.util.*;

import java.awt.*;

public class Hangman extends ConsoleProgram {

	private HangmanLexicon hangmanWords;
	
	private HangmanCanvas canvas;
	
	private RandomGenerator rgen = RandomGenerator.getInstance();
	
	/** Tracks the number of guesses the player has */
	private int guessCounter = 8;
	
	
    public void run() {
    	setUpGame();
    	playGame();
	}
    
  //This is the word being guessed
	private String hiddenWord;
    
  //This is the secret word
	private String word = pickWord();
	
	//This is the latest character entered by the user
	private char ch;
	
	//This string keeps track of all the incorrect guessed letters
	private String incorrectLetters = "";
    
    /*Set up the game by displaying the welcome message, 
     *how many letters there are in the word, 
     *and how many guesses the user has
     */
    private void setUpGame() {
    	canvas.reset();
    	hiddenWord = showNumberOfLetters();
    	canvas.displayWord(hiddenWord);
    	println("Welcome to Hangman!");
    	println("The word now looks like this: " + hiddenWord);
    	println("You have " + guessCounter + " guesses left.");
    }
	
    //Generates a random word selected from the HangmanLexicon
    private String pickWord() {
    	hangmanWords = new HangmanLexicon();
    	int randomWord = rgen.nextInt(0, (hangmanWords.getWordCount() - 1)); 
    	String pickedWord = hangmanWords.getWord(randomWord);
    	return pickedWord;
    }
	
    //Shows how many letters there are in the word as part of game setup
	private String showNumberOfLetters() {
		String result = "";
		for(int i = 0; i< word.length(); i++) {
			result = result + "-";
		}
		return result;
		}
	
	private void playGame() {
		while(guessCounter > 0) {
			String getChar = readLine("Your guess: ");
			while (true) {
				if(getChar.length() > 1) {
					getChar = readLine("You can only guess one letter at a time. Try again: ");
				}
				if(getChar.length() == 1) break;
			}
			ch = getChar.charAt(0);
			if(Character.isLowerCase(ch)) {
				ch = Character.toUpperCase(ch);
			}
			letterCheck();
			if (hiddenWord.equals(word)) {
				println("You guessed the word: " + word);
				println("You win");
				break;
			}
			println("The word now looks like this: " + hiddenWord);
			println("You have " + guessCounter + " guesses left.");
			
		}
		if (guessCounter == 0) {
			println("You're completely hung.");
			println("The word was:" + word);
			println("You lose.");
		}		
	}
	
	//updates the hiddenWord if the character entered is correct 
	private void letterCheck() {
		//checks to see if the guessed letter is in the word
		if(word.indexOf(ch) == -1) {
			println("There are no " + ch + "'s in the word");
			guessCounter--;
			incorrectLetters = incorrectLetters + ch;
			canvas.noteIncorrectGuess(incorrectLetters);
		}
		if(word.indexOf(ch) != -1) {
			println("The guess is correct.");
		}
		//goes through each of the letters in the word and checks if it matches the guessed letter, 
		//if it's a match, updates the hidden word to reveal the position of the guessed letter
		for(int i = 0; i < word.length(); i++) {
			if (ch == word.charAt(i)) {
				if (i > 0) {
					hiddenWord = hiddenWord.substring(0, i) + ch + hiddenWord.substring(i + 1);
				}
				if(i == 0) {
					hiddenWord = ch + hiddenWord.substring(1);
				}
				canvas.displayWord(hiddenWord);
			}
		}
	}
  
	
	public void init() {
		canvas = new HangmanCanvas();
		add(canvas);
		}
}