Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| Java™ Platform Standard Ed. 6
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## java.util.zip
Class GZIPInputStream

    java.lang.Object
      java.io.InputStream
          java.io.FilterInputStream
              java.util.zip.InflaterInputStream
                  java.util.zip.GZIPInputStream

All Implemented Interfaces:
  Closeable

    public class GZIPInputStream

extends InflaterInputStream

This class implements a stream filter for reading compressed data in the GZIP file format.

See Also:
  `InflaterInputStream`

Field Summary
`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
`buf, inf, len`

Fields inherited from class java.io.FilterInputStream
`in`

Constructor Summary
`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.

Method Summary
`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
`available, fill, mark, markSupported, read, reset, skip`

Methods inherited from class java.io.FilterInputStream
`read`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### crc

    protected CRC32 crc

  CRC-32 for uncompressed data.

### eos

    protected boolean eos

  Indicates end of input stream.

### GZIP_MAGIC

    public static final int GZIP_MAGIC

  GZIP header magic number.

  See Also:
    Constant Field Values

Constructor Detail

### GZIPInputStream

    public 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:
    `IOException` - if an I/O error has occurred
    `IllegalArgumentException` - if size is <= 0

### GZIPInputStream

    public GZIPInputStream(InputStream in)
                    throws IOException

  Creates a new input stream with a default buffer size.

  Parameters:
    `in` - the input stream
  Throws:
    `IOException` - if an I/O error has occurred

Method Detail

### read

    public int read(byte[] buf,
                    int off,
                    int len)
             throws IOException

  Reads uncompressed data into an array of bytes. If `len` is not zero, the method will block until some input can be decompressed; otherwise, no bytes are read and `0` is returned.

  Overrides:
    `read` in 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 `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 corrupt
  See Also:
    `FilterInputStream.in`

### close

    public void close()
               throws IOException

  Closes this input stream and releases any system resources associated with the stream.

  Specified by:
    `close` in interface `Closeable`
  Overrides:
    `close` in class `InflaterInputStream`
  Throws:
    `IOException` - if an I/O error has occurred
  See Also:
    `FilterInputStream.in`

Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| Java™ Platform Standard Ed. 6
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2009 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.