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Added in API level 9

DeflaterInputStream

public class DeflaterInputStream
extends FilterInputStream

java.lang.Object
↳	java.io.InputStream
	↳	java.io.FilterInputStream
		↳	java.util.zip.DeflaterInputStream

Implements an input stream filter for compressing data in the "deflate" compression format.

See also:

Summary

Fields
`protected final byte[]`	`buf` Input buffer for reading compressed data.
`protected final Deflater`	`def` Compressor for this stream.

Inherited fields

From class


    java.io.FilterInputStream

Public constructors
`DeflaterInputStream(InputStream in)` Creates a new input stream with a default compressor and buffer size.
`DeflaterInputStream(InputStream in, Deflater defl)` Creates a new input stream with the specified compressor and a default buffer size.
`DeflaterInputStream(InputStream in, Deflater defl, int bufLen)` Creates a new input stream with the specified compressor and buffer size.

Public methods
`int`	`available()` Returns 0 after EOF has been reached, otherwise always return 1.
`void`	`close()` Closes this input stream and its underlying input stream, discarding any pending uncompressed data.
`void`	`mark(int limit)` This operation is not supported.
`boolean`	`markSupported()` Always returns `false` because this input stream does not support the `mark()` and `reset()` methods.
`int`	`read()` Reads a single byte of compressed data from the input stream.
`int`	`read(byte[] b, int off, int len)` Reads compressed data into a byte array.
`void`	`reset()` This operation is not supported.
`long`	`skip(long n)` Skips over and discards data from the input stream.

Inherited methods

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

Fields

buf

Added in API level 9

byte[] buf

Input buffer for reading compressed data.

def

Added in API level 9

Deflater def

Compressor for this stream.

Public constructors

DeflaterInputStream

Added in API level 9

DeflaterInputStream (InputStream in)

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

Parameters
`in`	`InputStream`: input stream to read the uncompressed data to

Throws
`NullPointerException`	if `in` is null

DeflaterInputStream

Added in API level 9

DeflaterInputStream (InputStream in, 
                Deflater defl)

Creates a new input stream with the specified compressor and a default buffer size.

Parameters
`in`	`InputStream`: input stream to read the uncompressed data to
`defl`	`Deflater`: compressor ("deflater") for this stream

Throws
`NullPointerException`	if `in` or `defl` is null

DeflaterInputStream

Added in API level 9

DeflaterInputStream (InputStream in, 
                Deflater defl, 
                int bufLen)

Creates a new input stream with the specified compressor and buffer size.

Parameters
`in`	`InputStream`: input stream to read the uncompressed data to
`defl`	`Deflater`: compressor ("deflater") for this stream
`bufLen`	`int`: compression buffer size

Throws
`IllegalArgumentException`	if `bufLen` is <= 0
`NullPointerException`	if `in` or `defl` is null

Public methods

available

Added in API level 9

int available ()

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

Returns
`int`	zero after the end of the underlying input stream has been reached, otherwise always returns 1

Throws
`IOException`	if an I/O error occurs or if this stream is already closed

close

Added in API level 9

void close ()

Closes this input stream and its underlying input stream, discarding any pending uncompressed data.

Throws
`IOException`	if an I/O error occurs

mark

Added in API level 9

void mark (int limit)

This operation is not supported.

Parameters
`limit`	`int`: maximum bytes that can be read before invalidating the position marker

markSupported

Added in API level 9

boolean markSupported ()

Always returns false because this input stream does not support the mark() and reset() methods.

Returns
`boolean`	false, always

read

Added in API level 9

int read ()

Reads a single byte of compressed data from the input stream. This method will block until some input can be read and compressed.

Returns
`int`	a single byte of compressed data, or -1 if the end of the uncompressed input stream is reached

Throws
`IOException`	if an I/O error occurs or if this stream is already closed

read

Added in API level 9

int read (byte[] b, 
                int off, 
                int len)

Reads compressed data into a byte array. This method will block until some input can be read and compressed.

Parameters
`b`	`byte`: buffer into which the data is read
`off`	`int`: starting offset of the data within `b`
`len`	`int`: maximum number of compressed bytes to read into `b`

Returns
`int`	the actual number of bytes read, or -1 if the end of the uncompressed input stream is reached

Throws
`IndexOutOfBoundsException`	if `len` > `b.length - off`
`IOException`	if an I/O error occurs or if this input stream is already closed

reset

Added in API level 9

void reset ()

This operation is not supported.

Throws
`IOException`	always thrown

skip

Added in API level 9

long skip (long n)

Skips over and discards data from the input stream. This method may block until the specified number of bytes are read and skipped. Note: While n is given as a long, the maximum number of bytes which can be skipped is Integer.MAX_VALUE.

Parameters
`n`	`long`: number of bytes to be skipped

Returns
`long`	the actual number of bytes skipped

Throws
`IOException`	if an I/O error occurs or if this stream is already closed

Interfaces

Classes

Exceptions

Errors

Most visited

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DeflaterInputStream

Summary

Fields

Inherited fields

Public constructors

Public methods

Inherited methods

Fields

buf

def

Public constructors

DeflaterInputStream

DeflaterInputStream

DeflaterInputStream

Public methods

available

close

mark

markSupported

read

read

reset

skip