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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.io.InputStream java.io.FilterInputStream java.util.zip.InflaterInputStream java.util.zip.GZIPInputStream
public class GZIPInputStream
This class implements a stream filter for reading compressed data in the GZIP file format.
InflaterInputStream
Field Summary | |
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protected CRC32 |
crc
CRC-32 for uncompressed data. |
protected boolean |
eos
Indicates end of input stream. |
static int |
GZIP_MAGIC
GZIP header magic number. |
Fields inherited from class java.util.zip.InflaterInputStream |
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buf, inf, len |
Fields inherited from class java.io.FilterInputStream |
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in |
Constructor Summary | |
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GZIPInputStream(InputStream in)
Creates a new input stream with a default buffer size. |
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GZIPInputStream(InputStream in,
int size)
Creates a new input stream with the specified buffer size. |
Method Summary | |
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void |
close()
Closes this input stream and releases any system resources associated with the stream. |
int |
read(byte[] buf,
int off,
int len)
Reads uncompressed data into an array of bytes. |
Methods inherited from class java.util.zip.InflaterInputStream |
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available, fill, mark, markSupported, read, reset, skip |
Methods inherited from class java.io.FilterInputStream |
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read |
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 CRC32 crc
protected boolean eos
public static final int GZIP_MAGIC
Constructor Detail |
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public GZIPInputStream(InputStream in, int size) throws IOException
in
- the input streamsize
- the input buffer size
IOException
- if an I/O error has occurred
IllegalArgumentException
- if size is <= 0public GZIPInputStream(InputStream in) throws IOException
in
- the input stream
IOException
- if an I/O error has occurredMethod Detail |
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public int read(byte[] buf, int off, int len) throws IOException
len
is not
zero, the method will block until some input can be decompressed; otherwise,
no bytes are read and 0
is returned.
read
in class InflaterInputStream
buf
- the buffer into which the data is readoff
- the start offset in the destination array b
len
- the maximum number of bytes read
NullPointerException
- If buf
is null
.
IndexOutOfBoundsException
- If off
is negative,
len
is negative, or len
is greater than
buf.length - off
IOException
- if an I/O error has occurred or the compressed
input data is corruptFilterInputStream.in
public void close() throws IOException
close
in interface Closeable
close
in class InflaterInputStream
IOException
- if an I/O error has occurredFilterInputStream.in
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Java™ Platform Standard Ed. 6 |
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