Java

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Java was originally developed as an alternative to the C/C++ programming languages. It is now mainly used for building web, desktop, mobile, and embedded applications. Java is owned and licensed through Oracle, with free and open source implementations available from Oracle and other vendors.

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CyC2018 / CS-Notes

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Ji Zhu Mian Shi Bi Bei Ji Chu Zhi Shi , Leetcode, Ji Suan Ji Cao Zuo Xi Tong , Ji Suan Ji Wang Luo , Xi Tong She Ji

python java computer-science algorithm leetcode cpp interview system-design

Updated Aug 21, 2024

Snailclimb / JavaGuide

Star 154k

Java Mian Shi & Hou Duan Tong Yong Mian Shi Zhi Nan ,Fu Gai Ji Suan Ji Ji Chu , Shu Ju Ku , Fen Bu Shi , Gao Bing Fa Yu Xi Tong She Ji . Zhun Bei Hou Duan Ji Zhu Mian Shi ,Shou Xuan JavaGuide!

mysql java redis distributed-systems spring system algorithms jvm interview zookeeper redisson system-design

Updated Mar 10, 2026
Java

iluwatar / java-design-patterns

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Star 93.8k

Design patterns implemented in Java

java snippets design-patterns principles awesome-list hacktoberfest snippets-library snippets-collection

Updated Mar 1, 2026
Java

macrozheng / mall

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mallXiang Mu Shi Yi Tao Dian Shang Xi Tong ,Bao Gua Qian Tai Shang Cheng Xi Tong Ji Hou Tai Guan Li Xi Tong ,Ji Yu Spring Boot+MyBatisShi Xian ,Cai Yong DockerRong Qi Hua Bu Shu . Qian Tai Shang Cheng Xi Tong Bao Han Shou Ye Men Hu , Shang Pin Tui Jian , Shang Pin Sou Suo , Shang Pin Zhan Shi , Gou Wu Che , Ding Dan Liu Cheng , Hui Yuan Zhong Xin , Ke Hu Fu Wu , Bang Zhu Zhong Xin Deng Mo Kuai . Hou Tai Guan Li Xi Tong Bao Han Shang Pin Guan Li , Ding Dan Guan Li , Hui Yuan Guan Li , Cu Xiao Guan Li , Yun Ying Guan Li , Nei Rong Guan Li , Tong Ji Bao Biao , Cai Wu Guan Li , Quan Xian Guan Li , She Zhi Deng Mo Kuai .

mysql java docker redis elasticsearch spring spring-boot mongodb rabbitmq spring-cloud elk spring-security swagger-ui springboot mybatis springcloud

Updated Mar 6, 2026
Java

spring-projects / spring-boot

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Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

java framework spring spring-boot

Updated Mar 10, 2026
Java

doocs / advanced-java

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Core Interview Questions & Answers For Experienced Java(Backend) Developers | Hu Lian Wang Java Gong Cheng Shi Jin Jie Zhi Shi Wan Quan Sao Mang :Han Gai Gao Bing Fa , Fen Bu Shi , Gao Ke Yong , Wei Fu Wu , Hai Liang Shu Ju Chu Li Deng Ling Yu Zhi Shi

java redis elasticsearch distributed-systems spring-cloud zookeeper rpc message-queue high-availability hystrix ribbon eureka microservices-architecture feign high-concurrency dubbo advanced-java distributed-search-engine springcloud-config doocs

Updated Jan 21, 2026
Java

elastic / elasticsearch

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Free and Open Source, Distributed, RESTful Search Engine

java search-engine elasticsearch

Updated Mar 10, 2026
Java

Stirling-Tools / Stirling-PDF

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#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

java docker pdf pdf-converter hacktoberfest pdf-manipulation pdfmerger pdf-merger pdf-tools pdf-editor pdf-web-apps pdf-ocr

Updated Mar 10, 2026
TypeScript

TheAlgorithms / Java

Star 65.2k

All Algorithms implemented in Java

search java algorithm algorithms sort data-structures sorting-algorithms algorithm-challenges hacktoberfest algorithms-datastructures

Updated Mar 8, 2026
Java

kdn251 / interviews

Star 65k

Everything you need to know to get the job.

java algorithm algorithms leetcode interview interviews interview-practice algorithm-competitions leetcode-solutions interview-questions technical-coding-interview algorithm-challenges coding-interviews coding-challenge leetcode-questions coding-challenges leetcode-java interview-prep interview-preparation coding-interview

Updated May 12, 2025
Java

youngyangyang04 / leetcode-master

Star 60.7k

<> LeetCode Shua Ti Gong Lue :200Dao Jing Dian Ti Mu Shua Ti Shun Xu ,Gong 60wZi De Xiang Xi Tu Jie ,Shi Pin Nan Dian Pou Xi ,50Yu Zhang Si Wei Dao Tu ,Zhi Chi C++,Java,Python,Go,JavaScriptDeng Duo Yu Yan Ban Ben ,Cong Ci Suan Fa Xue Xi Bu Zai Mi Mang ! Lai Kan Kan ,Ni Hui Fa Xian Xiang Jian Hen Wan !

javascript python java go algorithm leetcode cpp interview programmer offer

Updated Jan 27, 2026
Shell

azl397985856 / leetcode

Star 55.8k

LeetCode Solutions: A Record of My Problem Solving Journey.( leetcodeTi Jie ,Ji Lu Zi Ji De leetcodeJie Ti Zhi Lu . )

javascript python java computer-science tree algorithm algorithms leetcode cpp interview algo data-structures leetcode-solutions algorithms-datastructures

Updated Jul 16, 2025
JavaScript

google / guava

Star 51.5k

Google core libraries for Java

java guava

Updated Mar 10, 2026
Java

dbeaver / dbeaver

Star 49k

Free universal database tool and SQL client

mysql java gui sql database ai nosql jdbc sqlite postgresql oracle openai dbeaver erd redshift db2 sqlserver copilot

Updated Mar 10, 2026
Java

ReactiveX / RxJava

Star 48.5k

RxJava - Reactive Extensions for the JVM - a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

java flow rxjava reactive-streams

Updated Mar 6, 2026
Java

skylot / jadx

Star 47.6k

Dex to Java decompiler

android java decompiler dex

Updated Mar 7, 2026
Java

square / okhttp

Star 46.9k

Square's meticulous HTTP client for the JVM, Android, and GraalVM.

android kotlin java graalvm

Updated Mar 10, 2026
Kotlin

GitHubDaily / GitHubDaily

Star 45.6k

Jian Chi Fen Xiang GitHub Shang Gao Zhi Liang , You Qu Shi Yong De Kai Yuan Ji Zhu Jiao Cheng , Kai Fa Zhe Gong Ju , Bian Cheng Wang Zhan , Ji Zhu Zi Xun . A list cool, interesting projects of GitHub.