流与通道(Stream and Channel in I/O)

1) File and device I/O 文件与设备的I/O
2) Object serialization 对象序列化
3) Buffers for data of primitive types 原生态数据的缓存
4) Character-set encoders and decoders字节集的编码与解码
5) Channels, a new primitive I/O abstraction 通道，一个新的IO抽象
6) A file interface that supports locks and memory mapping 支持锁和内存映射的文件接口
7) A multiplexed, non-blocking I/O facility for writing scalable servers
一个多分复用、非阻塞I/O设备用于编写可伸缩的服务器