- java.lang.Object
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- java.io.OutputStream
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- java.io.FilterOutputStream
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- java.util.zip.DeflaterOutputStream
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- java.util.zip.GZIPOutputStream
 
 
 
 
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- All Implemented Interfaces:
- Closeable,- Flushable,- AutoCloseable
 
 public class GZIPOutputStream extends DeflaterOutputStream This class implements a stream filter for writing compressed data in the GZIP file format.- Since:
- 1.1
 
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Field SummaryFields Modifier and Type Field Description protected CRC32crcCRC-32 of uncompressed data.- 
Fields declared in class java.util.zip.DeflaterOutputStreambuf, def
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Fields declared in class java.io.FilterOutputStreamout
 
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Constructor SummaryConstructors Constructor Description GZIPOutputStream(OutputStream out)Creates a new output stream with a default buffer size.GZIPOutputStream(OutputStream out, boolean syncFlush)Creates a new output stream with a default buffer size and the specified flush mode.GZIPOutputStream(OutputStream out, int size)Creates a new output stream with the specified buffer size.GZIPOutputStream(OutputStream out, int size, boolean syncFlush)Creates a new output stream with the specified buffer size and flush mode.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description voidfinish()Finishes writing compressed data to the output stream without closing the underlying stream.voidwrite(byte[] buf, int off, int len)Writes array of bytes to the compressed output stream.- 
Methods declared in class java.util.zip.DeflaterOutputStreamclose, deflate, flush, write
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Methods declared in class java.io.FilterOutputStreamwrite
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Methods declared in class java.io.OutputStreamnullOutputStream
 
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Field Detail- 
crcprotected CRC32 crc CRC-32 of uncompressed data.
 
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Constructor Detail- 
GZIPOutputStreampublic GZIPOutputStream(OutputStream out, int size) throws IOException Creates a new output stream with the specified buffer size.The new output stream instance is created as if by invoking the 3-argument constructor GZIPOutputStream(out, size, false). - Parameters:
- out- the output stream
- size- the output buffer size
- Throws:
- IOException- If an I/O error has occurred.
- IllegalArgumentException- if- size <= 0
 
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GZIPOutputStreampublic GZIPOutputStream(OutputStream out, int size, boolean syncFlush) throws IOException Creates a new output stream with the specified buffer size and flush mode.- Parameters:
- out- the output stream
- size- the output buffer size
- syncFlush- if- trueinvocation of the inherited- flush()method of this instance flushes the compressor with flush mode- Deflater.SYNC_FLUSHbefore flushing the output stream, otherwise only flushes the output stream
- Throws:
- IOException- If an I/O error has occurred.
- IllegalArgumentException- if- size <= 0
- Since:
- 1.7
 
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GZIPOutputStreampublic GZIPOutputStream(OutputStream out) throws IOException Creates a new output stream with a default buffer size.The new output stream instance is created as if by invoking the 2-argument constructor GZIPOutputStream(out, false). - Parameters:
- out- the output stream
- Throws:
- IOException- If an I/O error has occurred.
 
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GZIPOutputStreampublic GZIPOutputStream(OutputStream out, boolean syncFlush) throws IOException Creates a new output stream with a default buffer size and the specified flush mode.- Parameters:
- out- the output stream
- syncFlush- if- trueinvocation of the inherited- flush()method of this instance flushes the compressor with flush mode- Deflater.SYNC_FLUSHbefore flushing the output stream, otherwise only flushes the output stream
- Throws:
- IOException- If an I/O error has occurred.
- Since:
- 1.7
 
 
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Method Detail- 
writepublic void write(byte[] buf, int off, int len) throws IOExceptionWrites array of bytes to the compressed output stream. This method will block until all the bytes are written.- Overrides:
- writein class- DeflaterOutputStream
- Parameters:
- buf- the data to be written
- off- the start offset of the data
- len- the length of the data
- Throws:
- IOException- If an I/O error has occurred.
- See Also:
- FilterOutputStream.write(int)
 
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finishpublic void finish() throws IOExceptionFinishes writing compressed data to the output stream without closing the underlying stream. Use this method when applying multiple filters in succession to the same output stream.- Overrides:
- finishin class- DeflaterOutputStream
- Throws:
- IOException- if an I/O error has occurred
 
 
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