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## java.util.zip
Class InflaterInputStream

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

All Implemented Interfaces:
  Closeable

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.

See Also:
  `Inflater`

Field Summary
`protected byte[]` | `buf` Input buffer for decompression.
`protected Inflater` | `inf` Decompressor for this stream.
`protected int` | `len` Length of input buffer.

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

Constructor Summary
`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.

Method Summary
`int` | `available()` Returns 0 after EOF has been reached, otherwise always return 1.
`void` | `close()` Closes this input stream and releases any system resources associated with the stream.
`protected void` | `fill()` Fills input buffer with more data to decompress.
`void` | `mark(int readlimit)` Marks the current position in this input stream.
`boolean` | `markSupported()` Tests if this input stream supports the `mark` and `reset` methods.
`int` | `read()` Reads a byte of uncompressed data.
`int` | `read(byte[] b, int off, int len)` Reads uncompressed data into an array of bytes.
`void` | `reset()` Repositions this stream to the position at the time the `mark` method was last called on this input stream.
`long` | `skip(long n)` Skips specified number of bytes of uncompressed data.

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

### inf

    protected Inflater inf

  Decompressor for this stream.

### buf

    protected byte[] buf

  Input buffer for decompression.

### len

    protected int len

  Length of input buffer.

Constructor Detail

### InflaterInputStream

    public 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 is <= 0

### InflaterInputStream

    public 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")

### InflaterInputStream

    public InflaterInputStream(InputStream in)

  Creates a new input stream with a default decompressor and buffer size.

  Parameters:
    `in` - the input stream

Method Detail

### read

    public int read()
             throws IOException

  Reads a byte of uncompressed data. This method will block until enough input is available for decompression.

  Overrides:
    `read` in 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`

### read

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

  Reads uncompressed data into an array of bytes. This method will block until some input can be decompressed.

  Overrides:
    `read` in class `FilterInputStream`
  Parameters:
    `b` - 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 is reached or a preset dictionary is needed
  Throws:
    `ZipException` - if a ZIP format error has occurred
    `IOException` - if an I/O error has occurred
  See Also:
    `FilterInputStream.in`

### available

    public int available()
                  throws IOException

  Returns 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:
    `available` in class `FilterInputStream`
  Returns:
    1 before EOF and 0 after EOF.
  Throws:
    `IOException` - if an I/O error occurs.
  See Also:
    `FilterInputStream.in`

### skip

    public long skip(long n)
              throws IOException

  Skips specified number of bytes of uncompressed data.

  Overrides:
    `skip` in 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

### 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 `FilterInputStream`
  Throws:
    `IOException` - if an I/O error has occurred
  See Also:
    `FilterInputStream.in`

### fill

    protected void fill()
                 throws IOException

  Fills input buffer with more data to decompress.

  Throws:
    `IOException` - if an I/O error has occurred

### markSupported

    public boolean markSupported()

  Tests if this input stream supports the `mark` and `reset` methods. The `markSupported` method of `InflaterInputStream` returns `false`.

  Overrides:
    `markSupported` in class `FilterInputStream`
  Returns:
    a `boolean` indicating if this stream type supports the `mark` and `reset` methods.
  See Also:
    `InputStream.mark(int)`, `InputStream.reset()`

### mark

    public void mark(int readlimit)

  Marks the current position in this input stream.

  The `mark` method of `InflaterInputStream` does nothing.

  Overrides:
    `mark` in class `FilterInputStream`
  Parameters:
    `readlimit` - the maximum limit of bytes that can be read before the mark position becomes invalid.
  See Also:
    `InputStream.reset()`

### reset

    public void reset()
               throws IOException

  Repositions this stream to the position at the time the `mark` method was last called on this input stream.

  The method `reset` for class `InflaterInputStream` does nothing except throw an `IOException`.

  Overrides:
    `reset` in class `FilterInputStream`
  Throws:
    `IOException` - if this method is invoked.
  See Also:
    `InputStream.mark(int)`, `IOException`

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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.

Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.