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‎README.md

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### <em>Issue's:</em>
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_Please feel free to open new Issues._
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- To request a specific Exercise that you need answered.
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- Be sure to include the Chapter and Exercise number.
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- To request a change to an existing solution.
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- You find an error in an existing solution.
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- _Please feel free to open new Issues._
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- To request a specific Exercise that you need answered.
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- Be sure to include the Chapter and Exercise number.
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- To request a change to an existing solution.
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- You find an error in an existing solution.
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____
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<h1>Exercise Solutions:</h1>

‎ch_14/exercise14_17/Exercise14_17.java ‎ch_14/Exercise14_17.java

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package ch_14.exercise14_17;
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import javafx.application.Application;
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import javafx.fxml.FXMLLoader;
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import javafx.scene.Parent;
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import javafx.collections.ObservableList;
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import javafx.scene.Node;
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import javafx.scene.Scene;
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import javafx.scene.layout.Pane;
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import javafx.scene.paint.Color;
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import javafx.scene.shape.Arc;
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import javafx.scene.shape.Circle;
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import javafx.scene.shape.Line;
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import javafx.stage.Stage;
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import java.io.FileInputStream;
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import java.io.IOException;
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/**
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* 14.17 (Game: hangman) Write a program that displays a drawing for the popular hangman game, as shown in Figure 14.48a.
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*/

‎ch_15/Exercise15_11.java

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import javafx.application.Application;
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import javafx.scene.Scene;
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import javafx.scene.canvas.Canvas;
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import javafx.scene.canvas.GraphicsContext;
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import javafx.scene.input.KeyCode;
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import javafx.scene.layout.Pane;
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import javafx.scene.paint.Color;

‎ch_20/Exercise20_07.java

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package ch_20;
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import javafx.application.Application;
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import javafx.beans.property.SimpleStringProperty;
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import javafx.beans.property.StringProperty;
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import javafx.collections.ObservableList;
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import javafx.scene.Node;
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import javafx.scene.Scene;
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import javafx.scene.control.Label;
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import javafx.scene.input.KeyCode;
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import javafx.scene.layout.Pane;
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import javafx.scene.paint.Color;
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import javafx.scene.shape.Arc;
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import javafx.scene.shape.Circle;
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import javafx.scene.shape.Line;
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import javafx.scene.shape.Shape;
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import javafx.scene.text.Text;
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import javafx.scene.text.TextAlignment;
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import javafx.stage.Stage;
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import java.util.*;
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/**
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* ***20.7 (Game: hangman) Programming Exercise 7.35 presents a console version of the
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* popular hangman game. Write a GUI program that lets a user play the game. The
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* user guesses a word by entering one letter at a time, as shown in Figure 20.18.
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* If the user misses seven times, a hanging man swings. Once a word is finished,
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* the user can press the Enter key to continue to guess another word.
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*/
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public class Exercise20_07 extends Application {
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private final static double HEIGHT = 400;
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private final static double WIDTH = 400;
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int wrongAnswers = 0;
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Text currentWordPrompt = new Text("Guess a word: ");
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Text currentWordLbl = new Text();
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Text missedLetterPrompt = new Text("Missed letters: ");
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Text missedLettersLbl = new Text();
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boolean wordComplete;
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ObservableList<Node> observableNodes;
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StringProperty DISPLAY_WORD = new SimpleStringProperty();
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static String currentWord;
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StringProperty MISSED_LETTERS = new SimpleStringProperty();
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static String missedLetters = "";
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StringProperty USER_MESSAGE = new SimpleStringProperty();
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String[] words = {"abstract", "assert", "boolean",
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"break", "byte", "case", "catch", "class", "const",
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"continue", "default", "double", "enum",
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"protected", "public", "return", "short", "static",
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"super", "switch", "synchronized", "this",
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"throw", "throws", "transient", "void", "volatile",
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"while"};
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@Override
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public void start(Stage primaryStage) {
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Pane pane = new Pane();
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observableNodes = pane.getChildren();
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currentWordLbl.textProperty().bind(DISPLAY_WORD);
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missedLettersLbl.textProperty().bind(MISSED_LETTERS);
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Queue<Shape> parts = new LinkedList<>();
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ArrayList<Character> playedLetters = new ArrayList<>();
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Arc arc = new Arc(WIDTH / 4, HEIGHT - HEIGHT / 12, WIDTH / 5, HEIGHT / 12, 0, 180);
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arc.setFill(Color.TRANSPARENT);
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arc.setStroke(Color.BLACK);
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observableNodes.add(arc);
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Queue<String> wordsList = new LinkedList<>(Arrays.asList(words));
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Scene scene = new Scene(pane, WIDTH, HEIGHT);
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Line pole = new Line(arc.getCenterX(), arc.getCenterY() - arc.getRadiusY(), arc.getCenterX(),
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pane.getHeight() / 12);
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observableNodes.add(pole);
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Line holder = new Line(pole.getEndX(), pole.getEndY(), pane.getWidth() / 1.7, pole.getEndY());
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observableNodes.add(holder);
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double promptX = arc.getCenterX() + 50;
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double promptY = arc.getCenterY() - 55;
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currentWordPrompt.setTextAlignment(TextAlignment.RIGHT);
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currentWordPrompt.setX(promptX);
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currentWordPrompt.setY(promptY);
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observableNodes.add(currentWordPrompt);
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currentWordLbl.setTextAlignment(TextAlignment.RIGHT);
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currentWordLbl.setX(currentWordPrompt.getX() + 100);
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currentWordLbl.setY(currentWordPrompt.getY());
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observableNodes.add(currentWordLbl);
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missedLetterPrompt.setTextAlignment(TextAlignment.RIGHT);
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missedLetterPrompt.setX(promptX);
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missedLetterPrompt.setY(promptY + 20);
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observableNodes.add(missedLetterPrompt);
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missedLettersLbl.setTextAlignment(TextAlignment.RIGHT);
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missedLettersLbl.setX(missedLetterPrompt.getX() + 100);
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missedLettersLbl.setY(missedLetterPrompt.getY());
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observableNodes.add(missedLettersLbl);
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Line hang = new Line(holder.getEndX(), holder.getEndY(), holder.getEndX(), pane.getHeight() / 6);
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parts.add(hang);
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double radius = WIDTH / 10;
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Circle c = new Circle(holder.getEndX(), pane.getHeight() / 6 + radius, radius);
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c.setFill(Color.TRANSPARENT);
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c.setStroke(Color.BLACK);
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parts.add(c);
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Line leftArm = new Line(pane.getWidth() / 2, pane.getHeight() / 2,
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c.getCenterX() + c.getRadius() * Math.cos(Math.toRadians(220)),
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c.getCenterY() - c.getRadius() * Math.sin(Math.toRadians(220)));
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parts.add(leftArm);
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Line rightArm = new Line(pane.getWidth() / 1.2, pane.getHeight() / 2,
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c.getCenterX() + c.getRadius() * Math.cos(Math.toRadians(315)),
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c.getCenterY() - c.getRadius() * Math.sin(Math.toRadians(315)));
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parts.add(rightArm);
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Line body = new Line(c.getCenterX() + c.getRadius() * Math.cos(Math.toRadians(270)),
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c.getCenterY() - c.getRadius() * Math.sin(Math.toRadians(270)),
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c.getCenterX() + c.getRadius() * Math.cos(Math.toRadians(270)), pane.getHeight() / 1.6);
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parts.add(body);
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Line leftLeg = new Line(body.getEndX(), body.getEndY(),
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pane.getWidth() / 2, pane.getHeight() / 1.3);
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parts.add(leftLeg);
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Line rightLeg = new Line(body.getEndX(), body.getEndY(),
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pane.getWidth() / 1.2, pane.getHeight() / 1.3);
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parts.add(rightLeg);
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scene.setOnKeyPressed(e -> {
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KeyCode keyCode = e.getCode();
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if (keyCode.isLetterKey()) {
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String letter = keyCode.getName();
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System.out.println(letter);
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handleGuess(letter, currentWord, playedLetters, parts, observableNodes);
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} else if (keyCode == KeyCode.ENTER && wordComplete) {
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// Next Word
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currentWord = wordsList.poll();
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wrongAnswers = 0;
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missedLetters = "";
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playedLetters.clear();
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MISSED_LETTERS.set(missedLetters);
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DISPLAY_WORD.set(getDisplayWord(currentWord, playedLetters));
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wordComplete = false;
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}
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});
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primaryStage.setScene(scene);
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primaryStage.setResizable(false);
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primaryStage.setTitle(getClass().getName());
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primaryStage.show();
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if (wordsList.peek() != null) {
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currentWord = wordsList.poll();
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DISPLAY_WORD.set(getDisplayWord(currentWord, playedLetters));
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}
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}
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void handleGuess(String letter, String currentWord, ArrayList<Character> playedLetters, Queue<Shape> parts,
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ObservableList<Node> nodes) {
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char letterCh = Character.toLowerCase(letter.charAt(0));
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if (currentWord.contains(letterCh + "") && !wordComplete) {
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if (!playedLetters.contains(letterCh)) {
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playedLetters.add(letterCh);
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DISPLAY_WORD.set(getDisplayWord(currentWord, playedLetters));
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if (!DISPLAY_WORD.get().contains("*")) {
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wordComplete = true;
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MISSED_LETTERS.set("");
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}
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}
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} else if (!wordComplete) {
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wrongAnswers += 1;
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if (wrongAnswers == 7) {
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observableNodes.clear();
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observableNodes.add(new Label("Game Over"));
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}
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drawHangMan(parts, nodes);
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missedLetters += letter;
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MISSED_LETTERS.set(missedLetters.toLowerCase());
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}
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}
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void drawHangMan(Queue<Shape> parts, ObservableList<Node> nodes) {
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if (parts.peek() != null) {
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nodes.add(parts.poll());
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}
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}
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String getDisplayWord(String word, ArrayList<Character> playedLetters) {
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StringBuilder result = new StringBuilder();
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System.out.println(word);
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for (char ch : word.toCharArray()) {
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if (!playedLetters.contains(ch)) {
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result.append("*");
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} else {
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result.append(ch);
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}
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}
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return result.toString();
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}
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}

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