DeflaterOutputStream

DeflaterOutputStream

java.util.zip

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Java 1.1

closeable flushable

This class is a subclass of java.io.FilterOutputStream ; it filters a stream of data by compressing (deflating) it and then writing the compressed data to another output stream. To create a DeflaterOutputStream , you must specify both the stream it is to write to and a Deflater object to perform the compression. You can set various options on the Deflater object to specify just what type of compression is to be performed. Once a DeflaterOutputStream is created, its write( ) and close( ) methods are the same as those of other output streams. The InflaterInputStream class can read data written with a DeflaterOutputStream . A DeflaterOutputStream writes raw compressed data; applications often prefer one of its subclasses, GZIPOutputStream or ZipOutputStream , that wraps the raw compressed data within a standard file format.

Figure 16-139. java.util.zip.DeflaterOutputStream

 public class  DeflaterOutputStream  extends java.io.FilterOutputStream {  // Public Constructors  public  DeflaterOutputStream  (java.io.OutputStream  out  );        public  DeflaterOutputStream  (java.io.OutputStream  out  , Deflater  def  );        public  DeflaterOutputStream  (java.io.OutputStream  out  , Deflater  def  , int  size  );  // Public Instance Methods  public void  finish  ( ) throws java.io.IOException;  // Public Methods Overriding FilterOutputStream  public void  close  ( ) throws java.io.IOException;        public void  write  (int  b  ) throws java.io.IOException;        public void  write  (byte[ ]  b  , int  off  , int  len  ) throws java.io.IOException;  // Protected Instance Methods  protected void  deflate  ( ) throws java.io.IOException;  // Protected Instance Fields  protected byte[ ]  buf  ;        protected Deflater  def  ;   } 

Subclasses

GZIPOutputStream , ZipOutputStream