This class implements the general ZLIB data-compression algorithm used by the gzip and PKZip compression programs. The constants defined by this class are used to specify the compression strategy and the compression speed/strength tradeoff level to be used. If you set the nowrap argument to the constructor to true , the ZLIB header and checksum data are omitted from the compressed output, which is the format both gzip and PKZip use. The important methods of this class are setInput( ) , which specifies input data to be compressed, and deflate( ) , which compresses the data and returns the compressed output. The remaining methods exist so that Deflater can be used for stream-based compression, as it is in higher-level classes, such as GZIPOutputStream and ZipOutputStream . These stream classes are sufficient in most cases. Most applications do not need to use Deflater directly. The Inflater class uncompresses data compressed with a Deflater object. public class Deflater { // Public Constructors public Deflater ( ); public Deflater (int level ); public Deflater (int level , boolean nowrap ); // Public Constants public static final int BEST_COMPRESSION ; =9 public static final int BEST_SPEED ; =1 public static final int DEFAULT_COMPRESSION ; =-1 public static final int DEFAULT_STRATEGY ; =0 public static final int DEFLATED ; =8 public static final int FILTERED ; =1 public static final int HUFFMAN_ONLY ; =2 public static final int NO_COMPRESSION ; =0 // Public Instance Methods public int deflate (byte[ ] b ); public int deflate (byte[ ] b , int off , int len ); synchronized public void end ( ); synchronized public void finish ( ); synchronized public boolean finished ( ); synchronized public int getAdler ( ); synchronized default:1 5.0 public long getBytesRead ( ); synchronized default:0 5.0 public long getBytesWritten ( ); synchronized default:0 public int getTotalIn ( ); default:0 public int getTotalOut ( ); default:0 public boolean needsInput ( ); public void reset ( ); synchronized public void setDictionary (byte[ ] b ); public void setDictionary (byte[ ] b , int off , int len ); synchronized public void setInput (byte[ ] b ); public void setInput (byte[ ] b , int off , int len ); synchronized public void setLevel (int level ); synchronized public void setStrategy (int strategy ); synchronized // Protected Methods Overriding Object protected void finalize ( ); } Passed ToDeflaterOutputStream.DeflaterOutputStream( ) Type OfDeflaterOutputStream.def |