Class BufferedOutputStream
java.lang.Object
java.io.OutputStream
java.io.FilterOutputStream
java.io.BufferedOutputStream
- All Implemented Interfaces:
Closeable
,Flushable
,AutoCloseable
The class implements a buffered output stream. By setting up such
an output stream, an application can write bytes to the underlying
output stream without necessarily causing a call to the underlying
system for each byte written.
- Since:
- 1.0
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Field Summary
Modifier and TypeFieldDescriptionprotected byte[]
The internal buffer where data is stored.protected int
The number of valid bytes in the buffer.Fields declared in class java.io.FilterOutputStream
out
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Constructor Summary
ConstructorDescriptionCreates a new buffered output stream to write data to the specified underlying output stream.BufferedOutputStream
(OutputStream out, int size) Creates a new buffered output stream to write data to the specified underlying output stream with the specified buffer size. -
Method Summary
Modifier and TypeMethodDescriptionvoid
flush()
Flushes this buffered output stream.void
write
(byte[] b, int off, int len) Writeslen
bytes from the specified byte array starting at offsetoff
to this buffered output stream.void
write
(int b) Writes the specified byte to this buffered output stream.Methods declared in class java.io.FilterOutputStream
close, write
Methods declared in class java.io.OutputStream
nullOutputStream
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Field Details
-
buf
protected byte[] bufThe internal buffer where data is stored. -
count
protected int countThe number of valid bytes in the buffer. This value is always in the range0
throughbuf.length
; elementsbuf[0]
throughbuf[count-1]
contain valid byte data.
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Constructor Details
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BufferedOutputStream
Creates a new buffered output stream to write data to the specified underlying output stream.- Parameters:
out
- the underlying output stream.
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BufferedOutputStream
Creates a new buffered output stream to write data to the specified underlying output stream with the specified buffer size.- Parameters:
out
- the underlying output stream.size
- the buffer size.- Throws:
IllegalArgumentException
- if size <= 0.
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Method Details
-
write
Writes the specified byte to this buffered output stream.- Overrides:
write
in classFilterOutputStream
- Parameters:
b
- the byte to be written.- Throws:
IOException
- if an I/O error occurs.
-
write
Writeslen
bytes from the specified byte array starting at offsetoff
to this buffered output stream.Ordinarily this method stores bytes from the given array into this stream's buffer, flushing the buffer to the underlying output stream as needed. If the requested length is at least as large as this stream's buffer, however, then this method will flush the buffer and write the bytes directly to the underlying output stream. Thus redundant
BufferedOutputStream
s will not copy data unnecessarily.- Overrides:
write
in classFilterOutputStream
- Parameters:
b
- the data.off
- the start offset in the data.len
- the number of bytes to write.- Throws:
IOException
- if an I/O error occurs.IndexOutOfBoundsException
- Ifoff
is negative,len
is negative, orlen
is greater thanb.length - off
- See Also:
-
flush
Flushes this buffered output stream. This forces any buffered output bytes to be written out to the underlying output stream.- Specified by:
flush
in interfaceFlushable
- Overrides:
flush
in classFilterOutputStream
- Throws:
IOException
- if an I/O error occurs.- See Also:
-