Generating Random Integers Within a Specific Range

In Java, you can easily generate random integers within a specific range using the java.util.Random class.

Creating a Random Object

To generate random integers, you need to create an instance of the Random class.

Example:

import java.util.Random;

public class Main {
    public static void main(String[] args) {
        Random random = new Random();

        // Your code to generate random integers within a specific range goes here
    }
}

In this example, we create a Random object named random, which we will use to generate random integers.

Generating Random Integers within a Range

To generate random integers within a specific range, you can use the nextInt(int bound) method of the Random class. The nextInt(int bound) method returns a random integer between 0 (inclusive) and the specified bound (exclusive).

Example:

import java.util.Random;

public class Main {
    public static void main(String[] args) {
        Random random = new Random();

        // Generate a random integer between 1 and 100 (inclusive)
        int randomNumber = random.nextInt(100) + 1;

        System.out.println("Random Number: " + randomNumber);
    }
}

In this example, random.nextInt(100) generates a random integer between 0 and 99. To obtain a random number between 1 and 100 (inclusive), we add 1 to the result.

Generating Random Integers within a Custom Range

To generate random integers within a custom range, you can use the formula random.nextInt((max - min) + 1) + min.

Example:

import java.util.Random;

public class Main {
    public static void main(String[] args) {
        Random random = new Random();

        int min = 10;
        int max = 20;

        // Generate a random integer between min and max (inclusive)
        int randomNumber = random.nextInt((max - min) + 1) + min;

        System.out.println("Random Number: " + randomNumber);
    }
}

In this example, random.nextInt((max - min) + 1) + min generates a random integer between min and max (inclusive).