io

• 理解 C10K 问题
• select poll epoll

Stream

The java.io package provides several output stream and input stream classes that are descendants of its abstract OutputStream and InputStream classes.

Writer Reader

• draw.io(writer-reader)

JDK 1.0’s I/O capabilities are suitable for streaming bytes, but cannot properly stream characters because they don’t account for character encodings. JDK 1.1 overcame this problem by introducing writer/reader classes that take character encodings into account. For example, the java.io package includes FileWriter and FileReader classes for writing and reading character streams. Chapter 5 explores various writer

Writer

Reader

总结

java 中的OutputStream and InputStream 是面向字节流,但是他们不支持character encodings(编码/解码) 因此引入了Writer and Reader来支持编码.

• 常用的 stream 类：FileInputStream,FileOutputStream,BufferedInputStream,BufferedOutputStream,ByteArrayInputStream
• 常用的 reader 类：FileReader,BufferedReader
• 常用的 writer 类：FilterWriter,BufferedWriter