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Java in a Nutshell

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The java.util.zip Package

31.8 java.util.zip.DeflaterOutputStream (JDK 1.1)

This class is a subclass of java.io.FilterOutputStream; it "filters" a stream of data by compressing ("deflating") it and then writes the compressed data to another output stream. To create a DeflaterOutputStream, you must specify the stream that it is to write to, and also a Deflater object that is 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 be used to read data written with the DeflaterOutputStream.

Note that a DeflaterOutputStream writes raw compressed data; applications often prefer one of its subclasses, GZIPOutputStream or ZipOutputStream, which wraps the raw compressed data within a standard file format.

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



Extended By:

GZIPOutputStream, ZipOutputStream

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