😮 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

🔥LeetCode solutions in any programming language | 多种编程语言实现 LeetCode、《剑指 Offer（第 2 版）》、《程序员面试金典（第 6 版）》题解

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

APM, (Application Performance Management) tool for large-scale distributed systems.

Use SQL to query Elasticsearch

A high performance scripting language hosted on the JVM.

微信公众号、企业号Java SDK

itchat4j -- 用Java扩展个人微信号的能力

🐘 Elasticsearch real-time search and analytics natively integrated with Hadoop

Plugin to integrate Learning to Rank (aka machine learning for better relevance) with Elasticsearch

leetcode Solutions.java 250 / 269 (Algorithms)

使用java+httpclient+httpcleaner，多线程、分布式爬去电商网站商品信息，数据存储在hbase上，并使用solr对商品建立索引，使用redis队列存储一个共享的url仓库；使用zookeeper对爬虫节点生命周期进行监视等。

Preparation for interview

JavaPlot is a pure Java programming interface library for GNUPlot

Java stack overflow style Identicon