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## java.util.zip
Class GZIPInputStream

    java.lang.Object
      |
      +--java.io.InputStream
            |
            +--java.io.FilterInputStream
                  |
                  +--java.util.zip.InflaterInputStream
                        |
                        +--java.util.zip.GZIPInputStream

public class GZIPInputStream
extends InflaterInputStream

This class implements a stream filter for reading compressed data in the GZIP 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 the input 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, read, skip`

Methods inherited from class java.io.FilterInputStream
`mark, markSupported, read, reset`

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.

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. Blocks until enough input is available for decompression.
  Overrides:
    `read` in class `InflaterInputStream`
  Parameters:
    `buf` - the buffer into which the data is read
    `off` - the start offset of the data
    `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:
    `IOException` - if an I/O error has occurred or the compressed input data is corrupt

### close

    public void close()
               throws IOException

  Closes the input stream.
  Overrides:
    `close` in class `InflaterInputStream`
  Throws:
    `IOException` - if an I/O error has occurred

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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