public class

GZIPInputStream

extends InflaterInputStream

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

Class Overview

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

Summary

Constants
int	GZIP_MAGIC	GZIP header magic number.

Fields
protected CRC32	crc	CRC-32 for uncompressed data.
protected boolean	eos	Indicates end of input stream.

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Inherited Fields

From class java.util.zip.InflaterInputStream

From class java.io.FilterInputStream

Public Constructors
	GZIPInputStream(InputStream in, int size) Creates a new input stream with the specified buffer size.
	GZIPInputStream(InputStream in) Creates a new input stream with a default buffer size.

Public Methods
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.

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Inherited Methods

From class java.util.zip.InflaterInputStream

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.
void	fill() Fills input buffer with more data to decompress.
synchronized 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.
synchronized 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.

From class java.io.FilterInputStream

int	available() Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.
void	close() Closes this input stream and releases any system resources associated with the stream.
synchronized 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(byte[] b) Reads up to `byte.length` bytes of data from this input stream into an array of bytes.
int	read() Reads the next byte of data from this input stream.
int	read(byte[] b, int off, int len) Reads up to `len` bytes of data from this input stream into an array of bytes.
synchronized 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 over and discards `n` bytes of data from this input stream. This method simply performs `in.skip(n)`.

From class java.io.InputStream

int	available() Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.
void	close() Closes this input stream and releases any system resources associated with the stream.
synchronized 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(byte[] b) Reads some number of bytes from the input stream and stores them into the buffer array `b`.
abstract int	read() Reads the next byte of data from the input stream.
int	read(byte[] b, int off, int len) Reads up to `len` bytes of data from the input stream into an array of bytes.
synchronized 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 over and discards `n` bytes of data from this input stream.

From class java.lang.Object

Object	clone() Creates and returns a copy of this object.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
final Class<?>	getClass() Returns the runtime class of this `Object`.
int	hashCode() Returns a hash code value for the object.
final void	notify() Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll() Wakes up all threads that are waiting on this object's monitor.
String	toString() Returns a string representation of the object.
final void	wait() Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
final void	wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
final void	wait(long timeout) Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.

From interface java.io.Closeable

Constants

public static final int GZIP_MAGIC

GZIP header magic number.

Constant Value: 35615 (0x00008b1f)

Fields

protected CRC32 crc

CRC-32 for uncompressed data.

protected boolean eos

Indicates end of input stream.

Public Constructors

public GZIPInputStream (InputStream in, int size)

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

public GZIPInputStream (InputStream in)

Creates a new input stream with a default buffer size.

Parameters

in	the input stream

Throws

IOException	if an I/O error has occurred

Public Methods

public void close ()

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

Throws

IOException	if an I/O error has occurred

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

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.

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

Interfaces

Classes

Exceptions

Errors

GZIPInputStream

Class Overview

See Also

Summary

Constants

public static final int GZIP_MAGIC

Fields

protected CRC32 crc

protected boolean eos

Public Constructors

public GZIPInputStream (InputStream in, int size)

Parameters

Throws

public GZIPInputStream (InputStream in)

Parameters

Throws

Public Methods

public void close ()

Throws

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

Parameters

Returns

Throws