New to Java

Hi,
For example: I have compressed data (deflate) in byte array. And I want to uncompress the byte array:

// Decompress the bytes
Inflater decompresser = new Inflater();
decompresser.setInput(output, 0, compressedDataLength);
byte[] result = new byte[100];
int resultLength = decompresser.inflate(result);
decompresser.end();

but sometimes I dont`t know, somebody set 'nowrap' on true or false.
If somebody compressed data by means of:

Deflater def = new Deflater(1, true);

then, when I will use:

Inflater decompresser = new Inflater(); // = new Inflater(false)

there is an exception:

java.util.zip.DataFormatException: unknown compression method

because, I had to use:

Inflater decompresser = new Inflater(true);

I have written a class in order to avoid this problem:

public class NewInflaterInputStream extends FilterInputStream
{
    public InflaterInputStream(InputStream in) throws IOException
    {
        super(in);
        in = new PushbackInputStream(in);
        int firstByte = in.read();
        ((PushbackInputStream) in).unread(firstByte);
        if (firstByte == 120)
            this.in = new java.util.zip.InflaterInputStream(in);
        else
            this.in =
                    new java.util.zip.InflaterInputStream(in, new Inflater(true));
    }
}

But, I think, it isn`t a good idea. Do you have any better idea?