Java Number Guessing Game Project: Two Solutions with Limited Guesses

Java Project - Number Guessing Game:

Number Guessing Game :

User guesses a randomly generated number within a range.

This game generates a random number, and the player attempts to guess it within a set range (e.g., 1–100). After each guess, the program tells the player if their guess is too high, too low, or correct.

Input: User's guess of a number within a range (e.g., 1–100).
Output: Indication of whether the guess is too high, too low, or correct.

Example:

• Input: 50 (Guess)
• Output: "Too low"
• Input: 75
• Output: "Correct!"

Here are two different solutions for the Number Guessing Game project in Java:

Solution 1: Using a Simple While Loop

Code:

import java.util.Scanner;
import java.util.Random;

public class NumberGuessingGameWhileLoop {
    public static void main(String[] args) {
        // Create a Scanner object to get user input
        Scanner scanner = new Scanner(System.in);

        // Create a Random object to generate a random number
        Random random = new Random();

        // Generate a random number between 1 and 100
        int randomNumber = random.nextInt(100) + 1;
        
        // Initialize variable for the user's guess
        int guess = 0;

        // Inform the user about the game
        System.out.println("Welcome to the Number Guessing Game!");
        System.out.println("Guess a number between 1 and 100.");

        // Loop until the user guesses the correct number
        while (guess != randomNumber) {
            // Get the user's guess
            System.out.print("Enter your guess: ");
            guess = scanner.nextInt();

            // Check if the guess is too high, too low, or correct
            if (guess < randomNumber) {
                System.out.println("Too low!");
            } else if (guess > randomNumber) {
                System.out.println("Too high!");
            } else {
                System.out.println("Correct! You've guessed the number.");
            }
        }

        // Close the scanner to prevent resource leaks
        scanner.close();
    }
}

Output:

Welcome to the Number Guessing Game!
Guess a number between 1 and 100.
Enter your guess:  45
Too high!
Enter your guess:  30
Too high!
Enter your guess:  20
Too high!
Enter your guess:  15
Too high!
Enter your guess:  10
Too low!
Enter your guess:  13
Correct! You've guessed the number.

Explanation :

• Random Number Generation: The Random object generates a random number between 1 and 100.
• Input: The user inputs their guesses using the Scanner object.
• Loop: The while loop continues until the user correctly guesses the number.
• Feedback: After each guess, the program checks whether the guess is too high, too low, or correct.
• End: The game ends when the correct number is guessed, and the loop terminates.

Solution 2: Using a For Loop with Guess Limits

Code:

import java.util.Scanner;
import java.util.Random;

public class NumberGuessingGameForLoop {
    public static void main(String[] args) {
        // Create a Scanner object to get user input
        Scanner scanner = new Scanner(System.in);

        // Create a Random object to generate a random number
        Random random = new Random();

        // Generate a random number between 1 and 100
        int randomNumber = random.nextInt(100) + 1;
        
        // Set a limit on the number of guesses
        int maxAttempts = 10;

        // Inform the user about the game and the number of attempts
        System.out.println("Welcome to the Number Guessing Game!");
        System.out.println("Guess a number between 1 and 100.");
        System.out.println("You have " + maxAttempts + " attempts to guess the correct number.");

        // Start the guessing process with a for loop that limits attempts
        for (int attempts = 1; attempts <= maxAttempts; attempts++) {
            // Get the user's guess
            System.out.print("Attempt " + attempts + ": Enter your guess: ");
            int guess = scanner.nextInt();

            // Check if the guess is too high, too low, or correct
            if (guess < randomNumber) {
                System.out.println("Too low!");
            } else if (guess > randomNumber) {
                System.out.println("Too high!");
            } else {
                System.out.println("Correct! You've guessed the number in " + attempts + " attempts.");
                return; // End the program after a correct guess
            }

            // Inform the user if they have exhausted their attempts
            if (attempts == maxAttempts) {
                System.out.println("Sorry, you've run out of attempts. The number was: " + randomNumber);
            }
        }

        // Close the scanner to prevent resource leaks
        scanner.close();
    }
}  

Output:

Welcome to the Number Guessing Game!
Guess a number between 1 and 100.
You have 10 attempts to guess the correct number.
Attempt 1: Enter your guess:  50
Too high!
Attempt 2: Enter your guess:  30
Too low!
Attempt 3: Enter your guess:  40
Too low!
Attempt 4: Enter your guess:  45
Too high!
Attempt 5: Enter your guess:  42
Too low!
Attempt 6: Enter your guess:  43
Too low!
Attempt 7: Enter your guess:  44
Correct! You've guessed the number in 7 attempts.

Explanation:

• Random Number Generation: Similar to Solution 1, the Random object generates a random number between 1 and 100.
• Guess Limit: The game introduces a maximum number of guesses (10) using a for loop.
• Input: The user inputs their guesses through the Scanner object.
• Feedback: After each guess, the program informs the player if their guess is too high, too low, or correct.
• End: The game ends either when the correct number is guessed or when the maximum number of attempts is reached.

Java Code Editor: