- java.lang.Object
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- java.io.InputStream
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- java.io.FilterInputStream
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- java.util.zip.InflaterInputStream
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- java.util.zip.GZIPInputStream
 
 
 
 
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- All Implemented Interfaces:
- Closeable,- AutoCloseable
 
 public class GZIPInputStream extends InflaterInputStream This class implements a stream filter for reading compressed data in the GZIP file format.- Since:
- 1.1
- See Also:
- InflaterInputStream
 
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Field SummaryFields Modifier and Type Field Description protected CRC32crcCRC-32 for uncompressed data.protected booleaneosIndicates end of input stream.static intGZIP_MAGICGZIP header magic number.- 
Fields declared in class java.util.zip.InflaterInputStreambuf, inf, len
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Fields declared in class java.io.FilterInputStreamin
 
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Constructor SummaryConstructors Constructor Description GZIPInputStream(InputStream in)Creates a new input stream with a default buffer size.GZIPInputStream(InputStream in, int size)Creates a new input stream with the specified buffer size.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclose()Closes this input stream and releases any system resources associated with the stream.intread(byte[] buf, int off, int len)Reads uncompressed data into an array of bytes.- 
Methods declared in class java.util.zip.InflaterInputStreamavailable, fill, mark, markSupported, read, reset, skip
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Methods declared in class java.io.FilterInputStreamread
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Methods declared in class java.io.InputStreamnullInputStream, readAllBytes, readNBytes, readNBytes, transferTo
 
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Field Detail- 
crcprotected CRC32 crc CRC-32 for uncompressed data.
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eosprotected boolean eos Indicates end of input stream.
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GZIP_MAGICpublic static final int GZIP_MAGIC GZIP header magic number.- See Also:
- Constant Field Values
 
 
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Constructor Detail- 
GZIPInputStreampublic GZIPInputStream(InputStream in, int size) throws IOException Creates a new input stream with the specified buffer size.- Parameters:
- in- the input stream
- size- the input buffer size
- Throws:
- ZipException- if a GZIP format error has occurred or the compression method used is unsupported
- IOException- if an I/O error has occurred
- IllegalArgumentException- if- size <= 0
 
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GZIPInputStreampublic GZIPInputStream(InputStream in) throws IOException Creates a new input stream with a default buffer size.- Parameters:
- in- the input stream
- Throws:
- ZipException- if a GZIP format error has occurred or the compression method used is unsupported
- IOException- if an I/O error has occurred
 
 
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Method Detail- 
readpublic int read(byte[] buf, int off, int len) throws IOExceptionReads uncompressed data into an array of bytes. Iflenis not zero, the method will block until some input can be decompressed; otherwise, no bytes are read and0is returned.- Overrides:
- readin class- InflaterInputStream
- Parameters:
- buf- the buffer into which the data is read
- off- the start offset in the destination array- b
- len- the maximum number of bytes read
- Returns:
- the actual number of bytes read, or -1 if the end of the compressed input stream is reached
- Throws:
- NullPointerException- If- bufis- null.
- IndexOutOfBoundsException- If- offis negative,- lenis negative, or- lenis greater than- buf.length - off
- ZipException- if the compressed input data is corrupt.
- IOException- if an I/O error has occurred.
- See Also:
- FilterInputStream.in
 
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closepublic void close() throws IOExceptionCloses this input stream and releases any system resources associated with the stream.- Specified by:
- closein interface- AutoCloseable
- Specified by:
- closein interface- Closeable
- Overrides:
- closein class- InflaterInputStream
- Throws:
- IOException- if an I/O error has occurred
- See Also:
- FilterInputStream.in
 
 
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