二、流的体系结构
抽象基类 节点流(或文件流) 缓冲流(处理流的一种)
InputStream FileInputStream (read(byte[] buffer)) BufferedInputStream (read(byte[] buffer))
OutputStream FileOutputStream (write(byte[] buffer,0,len) BufferedOutputStream (write(byte[] buffer,0,len) / flush()
Reader FileReader (read(char[] cbuf)) BufferedReader (read(char[] cbuf) / readLine())
Writer FileWriter (write(char[] cbuf,0,len) BufferedWriter (write(char[] cbuf,0,len) / flush()