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Added in API level 1

GZIPInputStream

public class GZIPInputStream
extends InflaterInputStream

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

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

See also:

InflaterInputStream

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.

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.

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.
`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.

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.
`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 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.
`int`	`read(byte[] b)` Reads up to `byte.length` bytes of data from this input stream 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 over and discards `n` bytes of data from the input stream.

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.
`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.
`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.
`int`	`read(byte[] b)` Reads some number of bytes from the input stream and stores them into the buffer array `b`.
`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(long millis, 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 millis)` 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.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


  
    java.io.Closeable

From interface


  
    java.lang.AutoCloseable

Constants

GZIP_MAGIC

Added in API level 1

int GZIP_MAGIC

GZIP header magic number.

Constant Value: 35615 (0x00008b1f)

Fields

crc

Added in API level 1

CRC32 crc

CRC-32 for uncompressed data.

eos

Added in API level 1

boolean eos

Indicates end of input stream.

Public constructors

GZIPInputStream

Added in API level 1

GZIPInputStream (InputStream in, 
                int size)

Creates a new input stream with the specified buffer size.

Parameters
`in`	`InputStream`: the input stream
`size`	`int`: the input buffer size

Throws
`ZipException`	if a GZIP format error has occurred or the compression method used is unsupported
`IOException`	if an I/O error has occurred
`IllegalArgumentException`	if size is <= 0

GZIPInputStream

Added in API level 1

GZIPInputStream (InputStream in)

Creates a new input stream with a default buffer size.

Parameters
`in`	`InputStream`: the input stream

Throws
`ZipException`	if a GZIP format error has occurred or the compression method used is unsupported
`IOException`	if an I/O error has occurred

Public methods

close

Added in API level 1

void close ()

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

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

read

Added in API level 1

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`	`byte`: the buffer into which the data is read
`off`	`int`: the start offset in the destination array `b`
`len`	`int`: the maximum number of bytes read

Returns
`int`	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`
`ZipException`	if the compressed input data is corrupt.
`IOException`	if an I/O error has occurred.

Interfaces

Classes

Exceptions

Errors

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GZIPInputStream

Summary

Constants

Fields

Inherited fields

Public constructors

Public methods

Inherited methods

Constants

GZIP_MAGIC

Fields

crc

eos

Public constructors

GZIPInputStream

GZIPInputStream

Public methods

close

read