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「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。准备 Java 面试，首选 JavaGuide！
😮 Core Interview Questions & Answers For Experienced Java(Backend) Developers | 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、海量数据处理等领域知识
Free and Open Source, Distributed, RESTful Search Engine
Everything you need to know to get the job.
Ghidra is a software reverse engineering (SRE) framework
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
Free universal database tool and SQL client
ZXing ("Zebra Crossing") barcode scanning library for Java, Android
A browser automation framework and ecosystem.
Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.
Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.
👨🎓 Java Core Sprout : basic, concurrent, algorithm
Open Source Identity and Access Management For Modern Applications and Services
APM, Application Performance Monitoring System
A powerful flow control component enabling reliability, resilience and monitoring for microservices. (面向云原生微服务的高可用流控防护组件)
GraalVM compiles Java applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀
Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.
CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。
Open-source IoT Platform - Device management, data collection, processing and visualization.
High Performance Inter-Thread Messaging Library
ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
🚌 The IK Analysis plugin integrates Lucene IK analyzer into Elasticsearch and OpenSearch, support customized dictionary.
A high performance caching library for Java
Logstash - transport and process your logs, events, or other data