Decoding with base-64 and un-GZIP-ing the file contents

import java.io.*;

import java.util.zip.GZIPInputStream;

import org.apache.commons.codec.binary.Base64InputStream;

public class DecodeBase64AndGzip {

  public static void main(String[] args) throws Exception {

    if (args.length < 2) {

        System.out.println("Usage: java DecodeBase64AndGzipInflate
                            <inputFile> <outputFile>");

        return;

    }

    int BUFFER_SIZE = 4096;

    byte[] buffer = new byte[BUFFER_SIZE];

    InputStream input = new GZIPInputStream(
            new Base64InputStream( new FileInputStream(args[0]) ));

    OutputStream output = new FileOutputStream(args[1]);

    int n = input.read(buffer, 0, BUFFER_SIZE);

    while (n >= 0) {

        output.write(buffer, 0, n);

        n = input.read(buffer, 0, BUFFER_SIZE);

    }

    input.close();

    output.close();

  }

}