(de)compressing files using NIO

Question

In the many examples online, files are (de)compressed in java using a coded buffer. With NIO, however, there is no need to choose a good buffer size. I found examples for fi

Answer 1

You can use the static utility methods in java.nio.channels.Channels to wrap streams in channels and vice versa.

E.g. to create a channel, from which you can read the uncompressed data from a gzip compressed file:

FileChannel fc = 
    new RandomAccessFile("input.gz", "r").getChannel();

ReadableByteChannel gzc = 
    Channels.newChannel(
            new GZIPInputStream(
                    Channels.newInputStream(fc)));