Stream、Reader和Writer

InputStream/OutputStream:1)是所有的输入和输入类的基类。 

                             2)面向字节形式的I/O操作(8位字节流)。 

Reader/Writer:面向字符的I/O操作(16位的Unicode字符)

兼容Unicode

InputStreamReader:可以将InputStream转换为Reader

OutputStreamWriter:可以将OutputStream转换为Writer

Java1.0类与java1.1类的对应表1

InputStream对应Reader

OutputStream对应Writer

FileInputStream对应FileReader

FileOutputStream对应FileWriter

StringBufferInputStream对应StringReader

无对应StringWriter

ByteArrayInputStream对应CharArrayReader

ByteArrayOutputStream对应CharArrayWriter

应该尽可能使用Reader和Writer类。

Java1.0类与java1.1类的对应表2

FilterInputStream对应FilterReader

FilterOutputStream对应FilterWriter

BufferedInputStream对应BufferedReader

BufferedOutputStream对应BufferedWriter

DataInputStream

PrintStream对应PrintWriter

DataInputStream和DataOutputStream价值在于无论在于什么样的平台java都可以准配的写入和读取数据。在写字符串并且让DateOutputStream能够恢复唯一可靠的方法是使用Unicode-8编码(DataOutputStream的writeUTF方法)

I/O的重定向方法:setIn(InputStream), setOut(OutputStream), setErr(OutputStream)

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