- 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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- All Implemented Interfaces:
- Closeable,- AutoCloseable
 - Direct Known Subclasses:
- GZIPInputStream,- ZipInputStream
 
 public class InflaterInputStream extends FilterInputStream This class implements a stream filter for uncompressing data in the "deflate" compression format. It is also used as the basis for other decompression filters, such as GZIPInputStream.- Since:
- 1.1
- See Also:
- Inflater
 
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Constructor SummaryConstructors Constructor Description InflaterInputStream(InputStream in)Creates a new input stream with a default decompressor and buffer size.InflaterInputStream(InputStream in, Inflater inf)Creates a new input stream with the specified decompressor and a default buffer size.InflaterInputStream(InputStream in, Inflater inf, int size)Creates a new input stream with the specified decompressor and buffer size.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description intavailable()Returns 0 after EOF has been reached, otherwise always return 1.voidclose()Closes this input stream and releases any system resources associated with the stream.protected voidfill()Fills input buffer with more data to decompress.voidmark(int readlimit)Marks the current position in this input stream.booleanmarkSupported()Tests if this input stream supports themarkandresetmethods.intread()Reads a byte of uncompressed data.intread(byte[] b, int off, int len)Reads uncompressed data into an array of bytes.voidreset()Repositions this stream to the position at the time themarkmethod was last called on this input stream.longskip(long n)Skips specified number of bytes of uncompressed data.- 
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- 
infprotected Inflater inf Decompressor for this stream.
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bufprotected byte[] buf Input buffer for decompression.
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lenprotected int len Length of input buffer.
 
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Constructor Detail- 
InflaterInputStreampublic InflaterInputStream(InputStream in, Inflater inf, int size) Creates a new input stream with the specified decompressor and buffer size.- Parameters:
- in- the input stream
- inf- the decompressor ("inflater")
- size- the input buffer size
- Throws:
- IllegalArgumentException- if- size <= 0
 
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InflaterInputStreampublic InflaterInputStream(InputStream in, Inflater inf) Creates a new input stream with the specified decompressor and a default buffer size.- Parameters:
- in- the input stream
- inf- the decompressor ("inflater")
 
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InflaterInputStreampublic InflaterInputStream(InputStream in) Creates a new input stream with a default decompressor and buffer size.- Parameters:
- in- the input stream
 
 
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Method Detail- 
readpublic int read() throws IOExceptionReads a byte of uncompressed data. This method will block until enough input is available for decompression.- Overrides:
- readin class- FilterInputStream
- Returns:
- the byte read, or -1 if end of compressed input is reached
- Throws:
- IOException- if an I/O error has occurred
- See Also:
- FilterInputStream.in
 
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readpublic int read(byte[] b, 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- FilterInputStream
- Parameters:
- b- 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 is reached or a preset dictionary is needed
- Throws:
- NullPointerException- If- bis- null.
- IndexOutOfBoundsException- If- offis negative,- lenis negative, or- lenis greater than- b.length - off
- ZipException- if a ZIP format error has occurred
- IOException- if an I/O error has occurred
- See Also:
- FilterInputStream.in
 
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availablepublic int available() throws IOExceptionReturns 0 after EOF has been reached, otherwise always return 1.Programs should not count on this method to return the actual number of bytes that could be read without blocking. - Overrides:
- availablein class- FilterInputStream
- Returns:
- 1 before EOF and 0 after EOF.
- Throws:
- IOException- if an I/O error occurs.
 
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skippublic long skip(long n) throws IOExceptionSkips specified number of bytes of uncompressed data.- Overrides:
- skipin class- FilterInputStream
- Parameters:
- n- the number of bytes to skip
- Returns:
- the actual number of bytes skipped.
- Throws:
- IOException- if an I/O error has occurred
- IllegalArgumentException- if- n < 0
 
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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- FilterInputStream
- Throws:
- IOException- if an I/O error has occurred
- See Also:
- FilterInputStream.in
 
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fillprotected void fill() throws IOExceptionFills input buffer with more data to decompress.- Throws:
- IOException- if an I/O error has occurred
 
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markSupportedpublic boolean markSupported() Tests if this input stream supports themarkandresetmethods. ThemarkSupportedmethod ofInflaterInputStreamreturnsfalse.- Overrides:
- markSupportedin class- FilterInputStream
- Returns:
- a booleanindicating if this stream type supports themarkandresetmethods.
- See Also:
- InputStream.mark(int),- InputStream.reset()
 
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markpublic void mark(int readlimit) Marks the current position in this input stream.The markmethod ofInflaterInputStreamdoes nothing.- Overrides:
- markin class- FilterInputStream
- Parameters:
- readlimit- the maximum limit of bytes that can be read before the mark position becomes invalid.
- See Also:
- InputStream.reset()
 
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resetpublic void reset() throws IOExceptionRepositions this stream to the position at the time themarkmethod was last called on this input stream.The method resetfor classInflaterInputStreamdoes nothing except throw anIOException.- Overrides:
- resetin class- FilterInputStream
- Throws:
- IOException- if this method is invoked.
- See Also:
- InputStream.mark(int),- IOException
 
 
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