1. Introduction

In this blog post, we will go through a simple Java program designed to generate random numbers. Random numbers are used in various applications such as games, simulations, testing, and security.

2. Program Steps

1. Import the Random class from the java.util package.

2. Define the main class named RandomNumberGenerator.

3. Inside the main class, define the main method.

4. Inside the main method, create an object of the Random class.

5. Use the nextInt method of the Random class object to generate a random number within a specified range.

6. Print the generated random number.

3. Code Program

import java.util.Random; // 1. Importing Random class

public class RandomNumberGenerator { // 2. Defining the main class

    public static void main(String[] args) { // 3. Defining the main method

        Random random = new Random(); // 4. Creating Random object

        int upperBound = 100; // Specifying the upper bound for the random number
        int randomNumber = random.nextInt(upperBound); // 5. Generating random number

        System.out.println("Generated Random Number: " + randomNumber); // 6. Printing random number
    }
}

Output:

Generated Random Number: 47
(Note: The output will vary every time the program runs, as it generates a random number.)

4. Step By Step Explanation

– Step 1: The Random class from the java.util package is imported to generate random numbers.

– Step 2: The main class named RandomNumberGenerator is defined.

– Step 3: The main method, which serves as the entry point of the program, is defined inside the main class.

– Step 4: An object of the Random class is created.

– Step 5: The nextInt method of the Random class object is used to generate a random number. The method takes an upperBound as a parameter, which specifies the range of the random number generated. In this example, the upperBound is set to 100, so the random number will be between 0 (inclusive) and 100 (exclusive).

– Step 6: The program prints the generated random number to the console. The output will vary each time the program is run because a new random number is generated on each execution.