- java.lang.Object
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- java.io.OutputStream
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- java.io.FilterOutputStream
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- java.io.BufferedOutputStream
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- All Implemented Interfaces:
Closeable,Flushable,AutoCloseable
public class BufferedOutputStream extends FilterOutputStream
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
Fields Modifier and Type Field Description protected byte[]bufThe internal buffer where data is stored.protected intcountThe number of valid bytes in the buffer.-
Fields declared in class java.io.FilterOutputStream
out
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Constructor Summary
Constructors Constructor Description BufferedOutputStream(OutputStream out)Creates 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.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidflush()Flushes this buffered output stream.voidwrite(byte[] b, int off, int len)Writeslenbytes from the specified byte array starting at offsetoffto this buffered output stream.voidwrite(int b)Writes the specified byte to this buffered output stream.-
Methods declared in class java.io.FilterOutputStream
close, write
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Methods declared in class java.io.OutputStream
nullOutputStream
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Constructor Detail
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BufferedOutputStream
public BufferedOutputStream(OutputStream out)
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
public 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.- Parameters:
out- the underlying output stream.size- the buffer size.- Throws:
IllegalArgumentException- if size <= 0.
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Method Detail
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write
public void write(int b) throws IOExceptionWrites the specified byte to this buffered output stream.- Overrides:
writein classFilterOutputStream- Parameters:
b- the byte to be written.- Throws:
IOException- if an I/O error occurs.
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write
public void write(byte[] b, int off, int len) throws IOExceptionWriteslenbytes from the specified byte array starting at offsetoffto 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
BufferedOutputStreams will not copy data unnecessarily.- Overrides:
writein 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.- See Also:
FilterOutputStream.write(int)
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flush
public void flush() throws IOExceptionFlushes this buffered output stream. This forces any buffered output bytes to be written out to the underlying output stream.- Specified by:
flushin interfaceFlushable- Overrides:
flushin classFilterOutputStream- Throws:
IOException- if an I/O error occurs.- See Also:
FilterOutputStream.out
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