java io类别

io流分为字节流InputStream、OutputStream  和字符流Reader、Writer

下面分别有：

1、字符输出FileOutputStream,ByteArrayOutputStream,PipedOutPutStream,PrintStream,DataOutPutStream,ZipOutputStream,ObjectOutputStream

2、字符输入

FileInputStream,ByteArrayInputStream,StringBufferedInputStream,PipedInputStream,DataInputStream,SequenceInputStream,ZipInputStream,ObjectInputStream

3、字符输出

FileWriter,OuputStreamWriter,BufferedWriter,StringReader 

4、字符输入

FileReader,InputStreamReader,BufferedReader,StringWriter

可能不全