從左往右是父類到子類
操作字符流的類:
Writer --> OutputStreamWriter (字節(jié)流轉(zhuǎn)字符流,InputStream作參數(shù)) --> FileWriter
Reader --> InputStreamReader (字節(jié)流轉(zhuǎn)字符流,OutputStream作參數(shù)) --> FileReader
操作字節(jié)流的類:
InputStream --> FileInputStream
-------------> ByteArrayInputStream
OutputStream --> FileOutputStream
--------------> ByteArrayOutputStream
--------------> PrintStream