Merge pull request #304 from aldrinm/main

Ported 03 Animal to Java

03 Animal/java/Animal.java

@@ -0,0 +1,160 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.Scanner;
+
+/**
+ * ANIMAL
+ * <p>
+ * Converted from BASIC to Java by Aldrin Misquitta (@aldrinm)
+ */
+public class Animal {
+
+	public static void main(String[] args) {
+		printIntro();
+		Scanner scan = new Scanner(System.in);
+
+		List<Question> questions = new ArrayList<>();
+		questions.add(new Question("DOES IT SWIM", "FISH", "BIRD"));
+
+		boolean stopGame = false;
+		while (!stopGame) {
+			String choice = readMainChoice(scan);
+			switch (choice) {
+				case "LIST":
+					printKnownAnimals(questions);
+					break;
+				case "Q":
+				case "QUIT":
+					stopGame = true;
+					break;
+				default:
+					if (choice.toUpperCase(Locale.ROOT).startsWith("Y")) {
+						int k = 0;
+						boolean correctGuess = false;
+						while (questions.size() > k && !correctGuess) {
+							Question question = questions.get(k);
+							correctGuess = askQuestion(question, scan);
+							if (correctGuess) {
+								System.out.println("WHY NOT TRY ANOTHER ANIMAL?");
+							} else {
+								k++;
+							}
+						}
+
+						if (!correctGuess) {
+							askForInformationAndSave(scan, questions);
+						}
+					}
+			}
+		}
+
+	}
+
+	private static void askForInformationAndSave(Scanner scan, List<Question> questions) {
+		//Failed to get it right and ran out of questions
+		//Let's ask the user for the new information
+		System.out.print("THE ANIMAL YOU WERE THINKING OF WAS A ");
+		String animal = scan.nextLine();
+		System.out.printf("PLEASE TYPE IN A QUESTION THAT WOULD DISTINGUISH A %s FROM A %s ", animal, questions.get(
+				questions.size() - 1).falseAnswer);
+		String newQuestion = scan.nextLine();
+		System.out.printf("FOR A %s THE ANSWER WOULD BE ", animal);
+		boolean newAnswer = readYesOrNo(scan);
+		//Add it to our list
+		addNewAnimal(questions, animal, newQuestion, newAnswer);
+	}
+
+	private static void addNewAnimal(List<Question> questions, String animal, String newQuestion, boolean newAnswer) {
+		Question lastQuestion = questions.get(questions.size() - 1);
+		String lastAnimal = lastQuestion.falseAnswer;
+		lastQuestion.falseAnswer = null; //remove the false option to indicate that there is a next question
+
+		Question newOption;
+		if (newAnswer) {
+			newOption = new Question(newQuestion, animal, lastAnimal);
+		} else {
+			newOption = new Question(newQuestion, lastAnimal, animal);
+		}
+		questions.add(newOption);
+	}
+
+	private static boolean askQuestion(Question question, Scanner scanner) {
+		System.out.printf("%s ? ", question.question);
+
+		boolean chosenAnswer = readYesOrNo(scanner);
+		if (chosenAnswer) {
+			if (question.trueAnswer != null) {
+				System.out.printf("IS IT A %s ? ", question.trueAnswer);
+				return readYesOrNo(scanner);
+			}
+			//else go to the next question
+		} else {
+			if (question.falseAnswer != null) {
+				System.out.printf("IS IT A %s ? ", question.falseAnswer);
+				return readYesOrNo(scanner);
+			}
+			//else go to the next question
+		}
+		return false;
+	}
+
+	private static boolean readYesOrNo(Scanner scanner) {
+		boolean validAnswer = false;
+		Boolean choseAnswer = null;
+		while (!validAnswer) {
+			String answer = scanner.nextLine();
+			if (answer.toUpperCase(Locale.ROOT).startsWith("Y")) {
+				validAnswer = true;
+				choseAnswer = true;
+			} else if (answer.toUpperCase(Locale.ROOT).startsWith("N")) {
+				validAnswer = true;
+				choseAnswer = false;
+			}
+		}
+		return choseAnswer;
+	}
+
+	private static void printKnownAnimals(List<Question> questions) {
+		System.out.println("\nANIMALS I ALREADY KNOW ARE:");
+		List<String> animals = new ArrayList<>();
+		questions.forEach(q -> {
+			if (q.trueAnswer != null) {
+				animals.add(q.trueAnswer);
+			}
+			if (q.falseAnswer != null) {
+				animals.add(q.falseAnswer);
+			}
+		});
+		System.out.println(String.join("\t\t", animals));
+	}
+
+	private static String readMainChoice(Scanner scan) {
+		System.out.print("ARE YOU THINKING OF AN ANIMAL ? ");
+		return scan.nextLine();
+	}
+
+	private static void printIntro() {
+		System.out.println("                                ANIMAL");
+		System.out.println("              CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+		System.out.println("\n\n");
+		System.out.println("PLAY 'GUESS THE ANIMAL'");
+		System.out.println("\n");
+		System.out.println("THINK OF AN ANIMAL AND THE COMPUTER WILL TRY TO GUESS IT.");
+	}
+
+
+	public static class Question {
+		String question;
+		String trueAnswer;
+		String falseAnswer;
+
+		public Question(String question, String trueAnswer, String falseAnswer) {
+			this.question = question;
+			this.trueAnswer = trueAnswer;
+			this.falseAnswer = falseAnswer;
+		}
+	}
+
+}
+