Using the following Java code to compress/decompress bytes[] to/from GZIP. First text bytes to gzip bytes:

public static byte[] fromByteToGByte(byte[] bytes) {
    ByteArrayOutputStream baos = null;
    try {
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        baos = new ByteArrayOutputStream();
        GZIPOutputStream gzos = new GZIPOutputStream(baos);
        byte[] buffer = new byte[1024];
        int len;
        while((len = bais.read(buffer)) >= 0) {
            gzos.write(buffer, 0, len);
        }
        gzos.close();
        baos.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return(baos.toByteArray());
}

Then the method that goes the other way compressed bytes to uncompressed bytes:

public static byte[] fromGByteToByte(byte[] gbytes) {
    ByteArrayOutputStream baos = null;
    ByteArrayInputStream bais = new ByteArrayInputStream(gbytes);
    try {
        baos = new ByteArrayOutputStream();
        GZIPInputStream gzis = new GZIPInputStream(bais);
        byte[] bytes = new byte[1024];
        int len;
        while((len = gzis.read(bytes)) > 0) {
            baos.write(bytes, 0, len);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return(baos.toByteArray());
}

Think there is any effect since I'm not writing out to a gzip file?
Also I noticed that in the standard C# function that BitConverter reads the first four bytes and then the MemoryStream Write function is called with a start point of 4 and a length of input buffer length - 4. So is that effect the validity of the header?

Jim