Java Bean
IO
Regular Expression
Concurrency
java.util.concurrent API Class Diagram
线程管理
线程同步
ReadWriteLock & ReentrantReadWriteLock
线程同步工具
Phaser, Controlling phase change in concurrent phased tasks
Executor 框架
ScheduledThreadPoolExecutor, 定时调度线程
XML
SAX
Others
JSON
Jackson
Features for configuring Java-to-JSON mapping
Features for configuring JSON-to-Java mapping