codehub27: Java simple projects – Number guessing game:

Games are always interesting. let a user guess a number randomly and check the computer generated number is equal or not. The program is given below.

Class : GameNumberGuessing

Member functions: startIt(),getUserGuessedNo(), getNoByComputer()

Where startIt()- It is the beginning function to start the process.

getUserGuessedNo() – The user interaction to get the number to be guessed

getNoByComputer() - It makes the computer to generate a random number.

Logic:

· A number is given by user as a guess.
· Let the computer generate a random number.
· Check the user no is equal to computer no. if both are matched, just display the number found message.
· Otherwise, repeat the process until the user guesses the correct number.

Program:

import java.util.Scanner;

import java.util.concurrent.ThreadLocalRandom;

public class GameNumberGuessing {

private static final int MIN_No = 1;

private static final int MAX_No = 1000;

public static void main(String[] args) {

GameNumberGuessing game1 = new GameNumberGuessing();

game1.startIt();

}

public void startIt() {

boolean isUserGuessOption = false;

int noOfGuess = 0;

// Get the computer generated number

int computerNo = getNoByComputer();

// Program ends with user guesses the number correctly

while (!isUserGuessOption) {

int userNo = getUserGuessedNo();

if (userNo > computerNo) {

System.out.println("Sorry, the number you guessed is too high");

} else if (userNo < computerNo) {

System.out.println("Sorry, the number you guessed is too low");

} else if (userNo == computerNo) {

System.out.println("Congratulations! Your guess is correct!");

isUserGuessOption = true;

}

noOfGuess++;

}

System.out.println("You found the number in " + noOfGuess + " guesses");

}

public int getNoByComputer() {

return ThreadLocalRandom.current().nextInt(MIN_No, MAX_No + 1);

}

public int getUserGuessedNo() {

Scanner sn = new Scanner(System.in);

System.out.println("Please guess the number: ");

return sn.nextInt();

}

Output:

C:\raji\blog>javac GameNumberGuessing.java

C:\raji\blog>java GameNumberGuessing

Please guess the number:

234