com.jn.langx.util.io

类 BufferedInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

com.jn.langx.util.io.BufferedInputStream

所有已实现的接口:

Closeable, AutoCloseable

public class BufferedInputStream
extends FilterInputStream

字段概要

从类继承的字段 java.io.FilterInputStream

in

构造器概要

构造器

构造器和说明
BufferedInputStream(InputStream in)
BufferedInputStream(InputStream in, int size) Creates a BufferedInputStream with the specified buffer size, and saves its argument, the input stream in, for later use.

方法概要

限定符和类型	方法和说明
int	available() 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	close() Closes this input stream and releases any system resources associated with the stream.
void	mark(int readlimit) See the general contract of the mark method of InputStream.
boolean	markSupported() Tests if this input stream supports the mark and reset methods.
int	read() See the general contract of the read method of InputStream.
int	read(byte[] b, int off, int len) Reads bytes from this byte-input stream into the specified byte array, starting at the given offset.
ByteBuffer	readAsByteBuffer()
ByteBuffer	readAsByteBuffer(int maxSize)
void	reset() See the general contract of the reset method of InputStream.
long	skip(long n) See the general contract of the skip method of InputStream.

从类继承的方法 java.io.FilterInputStream

read

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

BufferedInputStream

public BufferedInputStream(InputStream in)

BufferedInputStream

public BufferedInputStream(InputStream in,
                           int size)

Creates a BufferedInputStream with the specified buffer size, and saves its argument, the input stream in, for later use. An internal buffer array of length size is created and stored in buf.

参数:

in - the underlying input stream.

size - the buffer size.

抛出:

IllegalArgumentException - if size <= 0.

方法详细资料

read

public int read()
         throws IOException

See the general contract of the read method of InputStream.

覆盖:

read 在类中 FilterInputStream

返回:

the next byte of data, or -1 if the end of the stream is reached.

抛出:

IOException - if this input stream has been closed by invoking its close() method, or an I/O error occurs.

另请参阅:

FilterInputStream.in

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

Reads bytes from this byte-input stream into the specified byte array, starting at the given offset.

This method implements the general contract of the corresponding read method of the InputStream class. As an additional convenience, it attempts to read as many bytes as possible by repeatedly invoking the read method of the underlying stream. This iterated read continues until one of the following conditions becomes true:

• The specified number of bytes have been read,

• The read method of the underlying stream returns -1, indicating end-of-file, or

• The available method of the underlying stream returns zero, indicating that further input requests would block.

If the first read on the underlying stream returns -1 to indicate end-of-file then this method returns -1. Otherwise this method returns the number of bytes actually read.

Subclasses of this class are encouraged, but not required, to attempt to read as many bytes as possible in the same fashion.

覆盖:

read 在类中 FilterInputStream

参数:

b - destination buffer.

off - offset at which to start storing bytes.

len - maximum number of bytes to read.

返回:

the number of bytes read, or -1 if the end of the stream has been reached.

抛出:

IOException - if this input stream has been closed by invoking its close() method, or an I/O error occurs.

skip

public long skip(long n)
          throws IOException

See the general contract of the skip method of InputStream.

覆盖:

skip 在类中 FilterInputStream

抛出:

IOException - if the stream does not support seek, or if this input stream has been closed by invoking its close() method, or an I/O error occurs.

available

public int available()
              throws IOException

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. The next invocation might be the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes.

This method returns the sum of the number of bytes remaining to be read in the buffer (count - pos) and the result of calling the in.available().

覆盖:

available 在类中 FilterInputStream

返回:

an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking.

抛出:

IOException - if this input stream has been closed by invoking its close() method, or an I/O error occurs.

mark

public void mark(int readlimit)

See the general contract of the mark method of InputStream.

覆盖:

mark 在类中 FilterInputStream

参数:

readlimit - the maximum limit of bytes that can be read before the mark position becomes invalid.

另请参阅:

BufferedInputStream.reset()

reset

public void reset()
           throws IOException

See the general contract of the reset method of InputStream.

If markpos is -1 (no mark has been set or the mark has been invalidated), an IOException is thrown. Otherwise, pos is set equal to markpos.

覆盖:

reset 在类中 FilterInputStream

抛出:

IOException - if this stream has not been marked or, if the mark has been invalidated, or the stream has been closed by invoking its close() method, or an I/O error occurs.

另请参阅:

BufferedInputStream.mark(int)

markSupported

public boolean markSupported()

Tests if this input stream supports the mark and reset methods. The markSupported method of BufferedInputStream returns true.

覆盖:

markSupported 在类中 FilterInputStream

返回:

a boolean indicating if this stream type supports the mark and reset methods.

另请参阅:

InputStream.mark(int), InputStream.reset()

close

public void close()
           throws IOException

Closes this input stream and releases any system resources associated with the stream. Once the stream has been closed, further read(), available(), reset(), or skip() invocations will throw an IOException. Closing a previously closed stream has no effect.

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

覆盖:

close 在类中 FilterInputStream

抛出:

IOException - if an I/O error occurs.

readAsByteBuffer

public ByteBuffer readAsByteBuffer()
                            throws IOException

抛出:

IOException

readAsByteBuffer

public ByteBuffer readAsByteBuffer(int maxSize)
                            throws IOException

抛出:

IOException