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HiLo.java
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132 lines (103 loc) · 3.22 KB
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package com.howtodoinjava.puzzles;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Random;
public class HiLo {
private final Random generator;
private int generatedNumber;
private int numberOfAttempts;
BufferedReader reader = null;
public HiLo() {
generator = new Random();
reader = new BufferedReader(new InputStreamReader(System.in));
}
public void start() throws IOException {
boolean wantToPlay = false;
boolean firstTime = true;
do {
System.out.println("\n\nWant to play the game of Hi and Lo??");
if (wantToPlay = prompt()) {
generatedNumber = generateSecretNumber();
numberOfAttempts = 0;
if (firstTime) {
describeRules();
firstTime = false;
}
playGame();
}
} while (wantToPlay);
System.out.println("\nThanks for playing the game. Hope you loved it !!");
reader.close();
}
private void describeRules() {
System.out.println("\nOnly 2 Rules:");
System.out.println("1) Guess the secret number in maximum 6 tries.");
System.out.println("2) The secret number is an integer between 1 and 100, inclusive :-)\n\n");
}
private int generateSecretNumber() {
return (generator.nextInt(100) + 1);
}
private void playGame() throws IOException {
while (numberOfAttempts < 6) {
int guess = getNextGuess();
if (guess > generatedNumber) {
System.out.println("HI");
} else if (guess < generatedNumber) {
System.out.println("LO");
} else {
System.out.println("Brave Soul, You guessed the right number!! Congratulations !!");
return;
}
numberOfAttempts++;
}
System.out.println("Sorry, you didn't guess the right number in six attempts !!");
System.out.println("The secret number was " + generatedNumber);
}
private boolean prompt() {
boolean answer = false;
try {
boolean inputOk = false;
while (!inputOk) {
System.out.print("Y / N : ");
String input = reader.readLine();
if (input.equalsIgnoreCase("y")) {
inputOk = true;
answer = true;
} else if (input.equalsIgnoreCase("n")) {
inputOk = true;
answer = false;
} else {
System.out.println(
"Ohh come on. Even Mr. Bean knows where are 'y' and 'n' in the keyboard?? Please try again:");
}
}
} catch (IOException e) {
e.printStackTrace();
System.exit(-1);
}
return answer;
}
private int getNextGuess() throws IOException {
boolean inputOk = false;
int number = 0;
String input = null;
while (!inputOk) {
try {
System.out.print("Please guess the secret number: ");
input = reader.readLine();
number = Integer.parseInt(input);
if (number >= 1 && number <= 100) {
inputOk = true;
} else {
System.out.println(
"Really? You didn't read the rules boy. Your number is not between 1 and 100 ("
+ number + ").");
}
} catch (NumberFormatException e) {
System.out.println("Invalid input (" + input + ")");
}
}
return number;
}
}