Java Random Number Generation Methods

There are various methods to generate random numbers in Java, with the most commonly used ones including:

1. By using the java.util.Random class: You can instantiate a Random class object to call its nextInt() method to generate random integers, or call its nextDouble() method to generate random floating-point numbers.

import java.util.Random;

Random random = new Random();
int randomInt = random.nextInt();
double randomDouble = random.nextDouble();

1. By using the Math.random() method: the random() method in the Math class will return a random floating point number between 0.0 (inclusive) and 1.0 (exclusive).

double random = Math.random();

1. Starting from Java 7, the ThreadLocalRandom class can be used to generate random numbers, offering a more efficient method for generating random numbers in multi-threaded environments.

import java.util.concurrent.ThreadLocalRandom;

int randomInt = ThreadLocalRandom.current().nextInt();
double randomDouble = ThreadLocalRandom.current().nextDouble();

In summary, the methods mentioned above are common ways to generate random numbers in Java, so choose the most suitable method based on your specific needs and scenario.