Java

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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Created by James Gosling
Released May 23, 1995

Repositories 78,851

CyC2018 / CS-Notes

64.2k

📚 技术面试必备基础知识、Leetcode 题解、后端面试、Java 面试、春招、秋招、操作系统、计算机网络、系统设计

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

Java Updated May 30, 2019

iluwatar / java-design-patterns

48k

Design patterns implemented in Java

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

Good first issues

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Wrong UML in observer

good first issue enhancement

#875 opened about 1 month ago by andreazube

SonarQube reports bugs

good first issue technical

#819 opened 7 months ago by iluwatar

Double-checked locking more antipattern than pattern

good first issue Hacktoberfest

#650 opened over 1 year ago by swhittaker

Java Updated May 30, 2019

Snailclimb / JavaGuide

41.9k

【Java学习+面试指南】一份涵盖大部分Java程序员所需要掌握的核心知识。

java jvm interview redis spring mysql zookeeper algorithms system system-design

Java Updated May 30, 2019

elastic / elasticsearch

41.4k

Open Source, Distributed, RESTful Search Engine

elasticsearch java search-engine

Good first issues

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MTermVector Java High Level Client Misses Fields Property

good first issue :Core/Features/Java High Level REST Client

#42232 opened 10 days ago by bisztray

NullPointerException when creating a watch with Jira action

good first issue :Core/Features/Watcher

#41922 opened 23 days ago by cjcenizal

A cluster with no data nodes or indices reports YELLOW health when an index is created.

good first issue :Distributed/Allocation

#41073 opened about 2 months ago by DaveCTurner

Java Updated May 30, 2019

ReactiveX / RxJava

39.2k

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observ…

java rxjava flow reactive-streams

Good first issues

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[2.x] ObservableEmitter/FlowableEmitter Javadoc Improvement

Documentation good first issue 2.x

#6390 opened 4 months ago by hborders

Javadoc: explain Flowable.groupBy should be consumed on all of its outputs

Documentation good first issue 2.x

#6289 opened 7 months ago by akarnokd

Example in readme gives me compilation error

Documentation 2.x

#6479 opened 12 days ago by cvgaviao

Java Updated May 30, 2019

spring-projects / spring-boot

38.5k

Spring Boot

java spring-boot spring framework

Good first issues

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Document the properties used by spring-boot-dependencies to control dependency versions

type: documentation

#16868 opened 16 days ago by wilkinsona

Document Prometheus Pushgateway support

type: documentation

#16853 opened 16 days ago by philwebb

Reinstate HTML single folder

type: documentation

#16854 opened 16 days ago by philwebb

Java Updated May 30, 2019

kdn251 / interviews

34.8k

Everything you need to know to get the job.

Java Updated Apr 30, 2019

square / okhttp

32.6k

An HTTP+HTTP/2 client for Android and Java applications.

java android kotlin

Good first issues

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Building wiki page out of date

documentation bug

#4766 opened 2 months ago by yschimke

Wiki page all about caching

documentation

#4637 opened 3 months ago by swankjesse

Unnecessary call to KeyManagerFactory.init in CustomTrust recipe

documentation

#4370 opened 7 months ago by uce

Java Updated May 30, 2019

square / retrofit

32.5k

Type-safe HTTP client for Android and Java by Square, Inc.

java android

Good first issues

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duplicate class when using recommended protobuf-lite

Documentation

#2954 opened 7 months ago by beigirad

Question: Do I need to close ResponseBody?

Documentation

#2950 opened 7 months ago by Malachiasz

Retrofit 2 Close ErrorResponse Body

Documentation

#2929 opened 7 months ago by paourissi

Java Updated May 30, 2019

google / guava

31.9k

Google core libraries for Java

guava java

Java Updated May 29, 2019

PhilJay / MPAndroidChart

27.3k

A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick chart…

java chart graph android

Java Updated May 28, 2019

apache / dubbo

26.8k

Apache Dubbo is a high-performance, java based, open source RPC framework.

dubbo rpc rpc-framework java high-performance soa service-oriented service-registration distributed-systems service-discovery cluster spring service-consumer service-provider service-registry microservices

Good first issues

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Update readme to remove the incubator prefix

good first issue help wanted

#4159 opened 6 days ago by ralf0131

why don't the attributes of @Reference annotation contains the 'merge' attribute?

good first issue

#3370 opened 4 months ago by LX1993728

The Document about dubbo consumer setting not updated

good first issue

#3025 opened 5 months ago by 9526xu

Java Updated May 30, 2019

square / leakcanary

22.8k

A memory leak detection library for Android

android memory-leak java kotlin kotlin-android outofmemory outofmemoryerror

Good first issues

Write a Java only sample

type: documentation status: help wanted

#54 opened about 4 years ago by pyricau

Kotlin Updated May 30, 2019

zxing / zxing

22.7k

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

java android barcode barcode-scanner zxing qr-code datamatrix upc

Java Updated May 22, 2019

crossoverJie / JCSprout

20.8k

👨‍🎓 Java Core Sprout : basic, concurrent, algorithm

java concurrent-programming algorithm basic-java netty jvm

Java Updated May 26, 2019

doocs / advanced-java

20.7k

😮 互联网 Java 工程师进阶知识完全扫盲：涵盖高并发、分布式、高可用、微服务等领域知识

Good first issues

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Doocs 微信交流群 | Wechat group for Doocs

good first issue help wanted

#70 opened 4 days ago by yanglbme

【开源项目维护】一起吗？

good first issue help wanted

#61 opened about 2 months ago by yanglbme

欢迎加入 Doocs 开源组织 | Welcome to join Doocs Open Source organization

good first issue notice

#44 opened 3 months ago by yanglbme

Java Updated May 29, 2019

skylot / jadx

18.8k

Dex to Java decompiler

android dex java decompiler

Java Updated May 30, 2019

alibaba / fastjson

17.9k

🚄 A fast JSON parser/generator for Java. (Aliyun Data Lake Analytics https://www.aliyun.com/product/datalakeanalytics …

fastjson java android json json-parser json-serialization json-serializer serialization deserialization best-performance

Java Updated May 29, 2019

microsoft / CNTK

16.2k

Microsoft Cognitive Toolkit (CNTK), an open source deep-learning toolkit

cognitive-toolkit cntk deep-learning machine-learning deep-neural-networks neural-network distributed python c-plus-plus c-sharp java

C++ Updated May 30, 2019

ityouknow / spring-boot-examples

15.6k

about learning Spring Boot via examples. Spring Boot 教程、技术栈示例代码，快速简单上手教程。

Java Updated May 18, 2019

libgdx / libgdx

15.4k

Desktop/Android/HTML5/iOS Java game development framework

libgdx java game cross-platform android ios html5 windows linux macosx 2d 3d framework

Good first issues

[HTML/GWT] Input.isKeyPressed Always TRUE If Release Occurs Outside of LibGDX Context

good first issue bug

#5134 opened about 1 year ago by villain-bryan

Tooltips broken on Android

good first issue help wanted

#4924 opened over 1 year ago by Dakror

Java Updated May 30, 2019

Wechat-Group / WxJava

14.7k

WxJava （微信开发 Java SDK），支持包括微信支付、开放平台、小程序、企业微信/企业号和公众号等的后端开发

weixin wechat weixin-sdk wechat-sdk java sdk cp mp wxpay wxjava miniapp miniprogram open weapp

Forked from chanjarster/weixin-java-tools Java Updated May 28, 2019

SeleniumHQ / selenium

14.5k

A browser automation framework and ecosystem.

selenium webdriver java ruby python

Good first issues

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Documentation on how to produce Geckodriver trace level logs using the Node bindings missing

C-docs C-nodejs

#6219 opened 10 months ago by motin

How do you write short-hand syntax of By.js?

C-docs C-nodejs

#5352 opened over 1 year ago by NakajimaTakuya

Documentation snippet for Javascript doesn't work

C-docs C-nodejs

#5339 opened over 1 year ago by mercmobily

Java Updated May 30, 2019

TheAlgorithms / Java

14.3k

All Algorithms implemented in Java

java algorithms implementation algorithms-implemented algorithms-datastructures algorithm-challenges wiki reference

Java Updated May 30, 2019

jhipster / generator-jhipster

13.8k

Open Source application generator for creating Spring Boot + Angular/React projects in seconds!

angular spring-boot webpack java docker yeoman-generator generator react kubernetes cloud

JavaScript Updated May 30, 2019

alibaba / arthas

13.5k

Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas

java agent trace jvm arthas trouble-shooting diagnosis classloader alibaba

Java Updated May 30, 2019

android10 / Android-CleanArchitecture

13.4k

This is a sample app that is part of a series of blog posts I have written about how to architect an android applicat…

android-cleanarchitecture architectural java android-application android android-development android-architecture

Java Updated Aug 30, 2018

google / ExoPlayer

13.1k

An extensible media player for Android

android mediaplayer java exoplayer

Java Updated May 30, 2019

jenkinsci / jenkins

13k

Jenkins automation server

continuous-integration continuous-delivery continuous-deployment java groovy jenkins pipelines-as-code devops hacktoberfest cicd

Java Updated May 30, 2019

google / flatbuffers

12.2k

Memory Efficient Serialization Library

C++ Updated May 30, 2019

Learn about java

Website: www.oracle.com/technetwork/java/javase/overview/index.html
Wikipedia: Wikipedia

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Java

Repositories 78,851

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