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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.io.OutputStream java.io.FilterOutputStream java.io.BufferedOutputStream
public class BufferedOutputStream
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.
Field Summary | |
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protected byte[] |
buf
The internal buffer where data is stored. |
protected int |
count
The number of valid bytes in the buffer. |
Fields inherited from class java.io.FilterOutputStream |
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out |
Constructor Summary | |
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BufferedOutputStream(OutputStream out)
Creates a new buffered output stream to write data to the specified underlying output stream. |
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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 | |
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void |
flush()
Flushes this buffered output stream. |
void |
write(byte[] b,
int off,
int len)
Writes len bytes from the specified byte array
starting at offset off to this buffered output stream. |
void |
write(int b)
Writes the specified byte to this buffered output stream. |
Methods inherited from class java.io.FilterOutputStream |
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close, write |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected byte[] buf
protected int count
Constructor Detail |
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public BufferedOutputStream(OutputStream out)
out
- the underlying output stream.public BufferedOutputStream(OutputStream out, int size)
out
- the underlying output stream.size
- the buffer size.
IllegalArgumentException
- if size <= 0.Method Detail |
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public void write(int b) throws IOException
write
in class FilterOutputStream
b
- the byte to be written.
IOException
- if an I/O error occurs.public void write(byte[] b, int off, int len) throws IOException
len
bytes from the specified byte array
starting at offset off
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.
write
in class FilterOutputStream
b
- the data.off
- the start offset in the data.len
- the number of bytes to write.
IOException
- if an I/O error occurs.FilterOutputStream.write(int)
public void flush() throws IOException
flush
in interface Flushable
flush
in class FilterOutputStream
IOException
- if an I/O error occurs.FilterOutputStream.out
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Java™ Platform Standard Ed. 6 |
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