Added in API level 9

Summary: Fields | Inherited Fields | Ctors | Methods | Inherited Methods

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


    protected
    
    
    InputStream

in

The input stream to be filtered.

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 `b.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, which may be 0, or 0 when end of stream is detected.
`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.
`static InputStream`	`nullInputStream()` Returns a new `InputStream` that reads no bytes.
`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.
`byte[]`	`readAllBytes()` Reads all remaining bytes from the input stream.
`int`	`readNBytes(byte[] b, int off, int len)` Reads the requested number of bytes from the input stream into the given byte array.
`byte[]`	`readNBytes(int len)` Reads up to a specified number of bytes from the input stream.
`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.
`void`	`skipNBytes(long n)` Skips over and discards exactly `n` bytes of data from this input stream.
`long`	`transferTo(OutputStream out)` Reads all bytes from this input stream and writes the bytes to the given output stream in the order that they are read.

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 timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          java.io.Closeable


      close()

Closes this stream and releases any system resources associated with it.

From interface


        
          java.lang.AutoCloseable


      close()

Closes this resource, relinquishing any underlying resources.

Fields

buf

Added in API level 9

protected final byte[] buf

Input buffer for reading compressed data.

def

Added in API level 9

protected final Deflater def

Compressor for this stream.

Public constructors

DeflaterInputStream

Added in API level 9

public 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

public 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

public 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 <= 0`
`NullPointerException`	if `in` or `defl` is null

Public methods

available

Added in API level 9

public 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

public 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

public 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

public 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

public 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

public 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

public void reset ()

This operation is not supported.

Throws
`IOException`	always thrown

skip

Added in API level 9

public 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