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????Java?????????????????????????????????????????????????????????????????????????????????InputStream?OutputStream???????????????????

InputStream?Java?????????????????????????IOException???InputStream??????????????????????????????????????read()?read(byte[])?read(byte[],int,int)??

OutputStream???????????????????void????????IOException?OutputStream??????????????????????????????write(int)?write(byte[])?write(byte[],int,int)??

FileInputStream?FileOutputStream????????????????????????FileInputStream?????????????????File???FileOutputStream?????????????????????????????????

ByteArrayInputStream?ByteArrayOutputStream???????????????ByteArrayInputStream????????????????????????????ByteArrayOutputStream????????????????????????

??????FilterInputStream?FilterOutputStream???????????????????????????????????BufferedInputStream?BufferedOutputStream??????????????????????

PushbackInputStream????????????????????????????????SequenceInputStream?????????????????????????????

PrintStream?????System.out???????????????????????toString???RandomAccessFile??????????????????????????????????????????????setLength??????????

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