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Random numbers play a critical role in numerous areas, particularly in simulations, mathematical modeling, and even games. The capacity to generate them in programming is hence essential. Often, we’re not just discussing positive random numbers, but also negative ones. In Java programming, there’re accepted methods you can follow to implement this functionality. Let’s jump into it.

## Add Negative Random Numbers in Java

The inclusion of negative random numbers can be accomplished using the Java’s **java.util.Random** class or **java.lang.Math** class. However, for the specific case of negative random numbers, a little tweak with those classes ensures the achievement of desired results.

import java.util.Random; public class Main { public static void main(String[] args) { Random random = new Random(); int randomInteger = -1 * random.nextInt(Integer.MAX_VALUE); System.out.println("Random Negative Integer: " + randomInteger); } }

In the preceding code, the **nextInt(Integer.MAX_VALUE)** function generates a random positive integer and the multiplication by “-1” turns it into a negative number.

## Step-by-step Explanation of the Code

Every line of code in Java plays a vital role in the outcome of the program. For the provided code, there’s a meticulous process that results in the generation of negative random numbers.

1. Import the **java.util.Random** library: This library is essential to give the Random functions for generating random numbers.

import java.util.Random;

2. Create an object of **Random** class: The object `random` is created from the Random class for generating random numbers.

Random random = new Random();

3. Generate a positive random integer: The `nextInt(Integer.MAX_VALUE)` method is utilized to create a positive random integer.

int randomInteger = random.nextInt(Integer.MAX_VALUE);

4. Convert the positive integer to a negative: The positive random number is multiplied by “-1” to make the number negative.

randomInteger = -1 * randomInteger;

5. Display the result: The number is then printed out to the console.

System.out.println("Random Negative Integer: " + randomInteger);

## Key Libraries or Functions Involved

The Java libraries or functions involved in solving this problem are primarily the `java.util.Random` library and its `nextInt` function.

The **java.util.Random** library provides an API for generating pseudo-random values of various data types such as boolean, float, integer, etc. For negative random numbers, the integral method `nextInt(int bound)` is critical. This function returns a pseudo-random, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive).

Always remember, Java gives a broad selection of tools to aid in your programming, and the capacity to create random numbers, whether positive or negative, is undoubtedly one of the most useful ones. Please don’t hesitate to use it where applicable.