How to use ThreadLocalRandom function to generate random numbers in Java
Commonly used random number generation methods in Java include the Random class and Math.random() method, but for multi-threaded programs, thread safety is very important. Therefore, in a multi-threaded environment, using the ThreadLocalRandom class for random number generation is a more appropriate choice.
ThreadLocalRandom is a new feature introduced in Java 7 that provides a thread-localized random number generator. In a multi-threaded environment, each thread will create its own ThreadLocalRandom instance, avoiding thread competition issues and thus improving the concurrency performance of the program.
It is very simple to use ThreadLocalRandom to generate random numbers. You only need to call the nextInt method it provides. This method has two overloaded versions:
- nextInt()
This method will return a random integer of type int. The range of this integer is negative and positive int values. - nextInt(int bound)
This method will return a random int type integer, the range of this integer is 0 to bound-1.
In addition, ThreadLocalRandom provides other types of random number generation methods: nextLong, nextFloat and nextBoolean, etc. The use of these methods is similar to nextInt.
The following is a sample code that uses ThreadLocalRandom to generate random numbers:
import java.util.concurrent.ThreadLocalRandom; public class RandomDemo { public static void main(String[] args) { // 生成一个范围在0-99的随机整数 int randomNum = ThreadLocalRandom.current().nextInt(100); System.out.println("随机数是:" + randomNum); } }
We can see in the output that the random numbers are different each time the program is run. This also confirms the thread safety and reliability of ThreadLocalRandom's random number generator.
In short, in a Java multi-threaded environment, using ThreadLocalRandom is safer, more efficient, and more convenient than using the Random class. Therefore, when writing multi-threaded programs, you should give priority to using ThreadLocalRandom to generate random numbers.
The above is the detailed content of How to use ThreadLocalRandom function to generate random numbers in Java. For more information, please follow other related articles on the PHP Chinese website!

The article discusses using Maven and Gradle for Java project management, build automation, and dependency resolution, comparing their approaches and optimization strategies.

The article discusses creating and using custom Java libraries (JAR files) with proper versioning and dependency management, using tools like Maven and Gradle.

The article discusses implementing multi-level caching in Java using Caffeine and Guava Cache to enhance application performance. It covers setup, integration, and performance benefits, along with configuration and eviction policy management best pra

The article discusses using JPA for object-relational mapping with advanced features like caching and lazy loading. It covers setup, entity mapping, and best practices for optimizing performance while highlighting potential pitfalls.[159 characters]

Java's classloading involves loading, linking, and initializing classes using a hierarchical system with Bootstrap, Extension, and Application classloaders. The parent delegation model ensures core classes are loaded first, affecting custom class loa


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SublimeText3 Linux new version
SublimeText3 Linux latest version

Atom editor mac version download
The most popular open source editor

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 Mac version
God-level code editing software (SublimeText3)