hangman/Hangman.java

import javafx.application.*;
import javafx.scene.*;
import javafx.scene.shape.*;
import javafx.scene.paint.*;
import javafx.scene.layout.*;
import javafx.scene.text.*;
import javafx.stage.*;
import javafx.scene.control.*;
import javafx.scene.input.*;

public class Hangman extends Application {
   private Dictionary dict = new Dictionary();
   private String secretWord;
   
   private Text[] letterGuesses;
   private Text[] lettersRevealedSoFar;
   private Shape[] hangman;
   
   private int currentHangmanPart;
   private boolean activeGame;
   
   public void start(Stage primaryStage) {        
      primaryStage.setTitle("Hangman");
      Font gameFont = Font.font("Consolas", 22.0);
      
      Text statusBox = new Text(200, 100, "");
      statusBox.setFont(gameFont);
      Pane main = this.setUpLayout(statusBox);
      Scene scene = new Scene(main, 400, 500);
      
      Button resetButton = new Button("New Game");
      resetButton.setDefaultButton(true);
      resetButton.relocate(25,350);
      main.getChildren().add(resetButton);        
      
      resetButton.setOnAction( 
         e -> {
            Pane newPane = setUpLayout(statusBox);
            newPane.getChildren().add(resetButton);
            scene.setRoot(newPane);
         });
      
      scene.setOnKeyPressed( 
         e -> {
            if (activeGame) {
               String guess = e.getText();
               guess = guess.toLowerCase();//use a string method to convert guess to lowercase
               checkGuess(guess, statusBox);
            }
         });
      
      primaryStage.setScene(scene);
      primaryStage.show();
   }
   
   private Pane setUpLayout(Text statusBox) {        
      Pane main = new Pane();
      Font gameFont = Font.font("Consolas", 22.0);
      
      //set new word to guess
      this.secretWord = dict.getRandomWord();
   	
      GridPane word = new GridPane();
      word.setHgap(5);
      
      this.currentHangmanPart = 0;
      
      GridPane lettersPane = new GridPane();
      lettersPane.relocate(25, 430);
      lettersPane.setHgap(5);
      lettersPane.setVgap(5);
      
      //create letterGuesses
      this.letterGuesses = new Text[26];// finish this line
      for (int i = 0; i < 26; i++) {
         String temp = "l";//finish this line
         this.letterGuesses[i] = new Text(temp);
         letterGuesses[i].setFont(gameFont);
         lettersPane.add(letterGuesses[i], i % 13,  i / 13);
      }
      
      //set up lettersRevealedSoFar
      this.lettersRevealedSoFar = new Text[this.secretWord.length()];
      for (int i = 0; i < lettersRevealedSoFar.length; i++) {
         this.lettersRevealedSoFar[i] = new Text("_");
         this.lettersRevealedSoFar[i].setFont(gameFont);
         word.add(this.lettersRevealedSoFar[i], i, 0);
      }
      
      //set up the gallows
      Pane figure = new Pane();
      Shape[] gallows = { new Line(120, 40, 120, 10),
                        new Line(120, 10, 40, 10),
                        new Line(40, 10, 40, 250),
                        new Rectangle(150, 7) };
      gallows[3].relocate(20, 250);
      for (int i = 0; i < gallows.length; i++) {
         gallows[i].setStroke(Color.BLACK);
         gallows[i].setStrokeWidth(2.0);
         figure.getChildren().add(gallows[i]);
      }
      
      //set up the hangman outline
      this.hangman = new Shape[6];
      this.hangman[0] = new Circle(120, 60, 20, Color.WHITE); // head
      this.hangman[1] = new Line(120, 80, 120, 150); // body
      this.hangman[2] = new Line(120, 110, 80, 90); // left arm
      this.hangman[3] = new Line(120, 110, 160, 90); // right arm
      this.hangman[4] = new Line(120, 150, 100, 200); // left leg
      this.hangman[5] = new Line(120, 150, 140, 200); // right leg
      
      for (int i = 0; i < this.hangman.length; i++) {
         this.hangman[i].setStroke(Color.WHITE);
         this.hangman[i].setStrokeWidth(3.0);
         figure.getChildren().add(this.hangman[i]);
      }
      
      //set up the alphabet
      Text title = new Text(25, 420, "Guesses so far:");
                              
      //ready to play
      this.activeGame = true;
      statusBox.setText("Ready to play");
      statusBox.setFill(Color.BLUE);
      
      //place everything in window
      word.relocate(20, 300);
      main.getChildren().add(word);
      main.getChildren().add(figure);
      main.getChildren().add(title);
      main.getChildren().add(lettersPane);
      main.getChildren().add(statusBox);
      
      return main;
   }
  
   private void checkGuess(String s, Text statusBox) {
      int index = this.findLetter(s);
      
      if (!alreadyGuessed(index)) {
         boolean found = foundInSecretWord(s);
         
         if (found) /* correct guess */ {
            this.letterGuesses[index].setFill(Color.GREEN);
            checkIfWon(s, statusBox);
         }
         else /* incorrect guess */ {
            this.letterGuesses[index].setFill(Color.RED);
            checkIfLost(s, statusBox);
         }
      }
   }
   private int findLetter(String s) {
      int index = Dictionary.ALPHABET.indexOf(s);
      boolean isLetter = (index != -1) && (s.length() == 1);
   	//Determine if s contains a single letter of the alphabet, using String methods
   	//Return the index of this letter in the array letterGuesses
   		//e.g. "a" is stored in index 0, "b" in index 1, etc.
   	//If the string is not a letter, return -1
      int ret = -1;
      if (isLetter) {
         for (int i = 0; i < this.letterGuesses.length; i ++) {
            if (this.letterGuesses[i].getText() == s) {
               ret = i;
               break;
            }
         }
      }
      return ret;
      //write your code for this method
   }
   private boolean alreadyGuessed(int index) {
      if (index >= 0) {
         Color currColor = (Color)this.letterGuesses[index].getFill();
         if (currColor.equals(Color.BLACK)) {
            return false;
         }
         else {
            return true;
         }
      }
      return true;
   }
   private boolean foundInSecretWord(String s) {
      //Determine if s is a correct or incorrect guess
   	//Return true if s corresponds to a letter in the secret word, and return false otherwise
   	
   	//write your code for this method
      boolean inSecretWord = this.secretWord.indexOf(s) != -1;
      boolean guessed = false;
      int i = 0;
      while (!guessed && i < this.lettersRevealedSoFar.length) {
         guessed = this.lettersRevealedSoFar[i].getText() == s;
         i += 1;
      }
      return inSecretWord && !guessed;
   }
   private void checkIfWon(String s, Text statusBox) {
      //write your code here
      boolean won = true;
      int i = 0;
      while (won && i < this.lettersRevealedSoFar.length) {
         won = lettersRevealedSoFar[i].getText() != "_";
         i += 1;
      }
      if (won) {
         statusBox.setText("YOU WIN!!!");
         statusBox.setFill(Color.GREEN);
         this.activeGame = false;
      }
      else {
         statusBox.setText("Letter " + s + " is \ncorrect!");
         statusBox.setFill(Color.FORESTGREEN);
      }
   }
   private void checkIfLost(String s, Text statusBox) {
      if (this.currentHangmanPart < 6) {
         this.hangman[this.currentHangmanPart].setStroke(Color.BLACK);
         this.currentHangmanPart++;
         
         statusBox.setText("Letter " + s + " is \nnot correct.");
         statusBox.setFill(Color.FIREBRICK);
      }
      else {
         for (int i = 0; i < this.lettersRevealedSoFar.length; i++) {
            this.lettersRevealedSoFar[i].setText(this.secretWord.charAt(i)+"");
            this.lettersRevealedSoFar[i].setFill(Color.FIREBRICK);
         }
         statusBox.setText("You lost. :(");
         statusBox.setFill(Color.RED);
         this.activeGame = false;
      }
   }

   public static void main(String[] args) {
      launch(args);
   }
}