列举常用的类方便查看，温故知新！
| byte input | byte output | character input | character output | |
|---|---|---|---|---|
| Basic | InputStream | OutputStream | InputStreamReader | OutputStreamWriter |
| Array | ByteArrayInputStream | ByteArrayOutputStream | CharArrayReader | CharArrayWriter |
| File | FileInputStream | FileOutputStream | FileReader | FileWriter |
| Piped | PipedInputStream | PipedOutputStream | PipedReader | PipedWriter |
| Buffered | BufferedInputStream | BufferedOutputStream | BufferedReader | BufferedWriter |
| Filter | FilterInputStream | FilterOutputStream | FilterReader | FilterWriter |
| String | StringReader | StringWriter | ||
| Data | DataInputStream | DataOutputStream | ||
| Object | ObjectInputStream | ObjectOutputStream |