OutputStream类型:

Subclasses:

, , , , , 

void	() Closes this output stream and releases any system resources associated with this stream.
void	() Flushes this output stream and forces any buffered output bytes to be written out.
void	(byte[] b) Writes  b.length bytes from the specified byte array to this output stream.
void	(byte[] b, int off, int len) Writes  len bytes from the specified byte array starting at offset  off to this output stream.
abstract void	(int b) Writes the specified byte to this output stream.

 构造器：

( file)

Creates a file output stream to write to the file represented by the specified 

File object.

( file, boolean append)

Creates a file output stream to write to the file represented by the specified 

File object.

( fdObj)

Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system.

( name)

Creates a file output stream to write to the file with the specified name.

( name, boolean append)

Creates a file output stream to write to the file with the specified name.

InputStream类型:

 

int	() Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.
void	() Closes this input stream and releases any system resources associated with the stream.
void	(int readlimit) Marks the current position in this input stream.
boolean	() Tests if this input stream supports the  mark and  reset methods.
abstract int	() Reads the next byte of data from the input stream.
int	(byte[] b) Reads some number of bytes from the input stream and stores them into the buffer array  b.
int	(byte[] b, int off, int len) Reads up to  len bytes of data from the input stream into an array of bytes.
void	() Repositions this stream to the position at the time the  mark method was last called on this input stream.
long	(long n) Skips over and discards  n bytes of data from this input stream.

构造器：

( file)

Creates a 

FileInputStream by opening a connection to an actual file, the file named by the 

File object 

file in the file system.

( fdObj)

Creates a 

FileInputStream by using the file descriptor 

fdObj, which represents an existing connection to an actual file in the file system.

( name)

Writer 类：

public abstract class Writer extends implements , ,

	(char c) Appends the specified character to this writer.
	( csq) Appends the specified character sequence to this writer.
	( csq, int start, int end) Appends a subsequence of the specified character sequence to this writer.
abstract void	() Closes the stream, flushing it first.
abstract void	() Flushes the stream.
void	(char[] cbuf) Writes an array of characters.
abstract void	(char[] cbuf, int off, int len) Writes a portion of an array of characters.
void	(int c) Writes a single character.
void	( str) Writes a string.
void	( str, int off, int len) Writes a portion of a string.