Java tutorial
import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.zip.GZIPOutputStream; public class MainClass { public final static String GZIP_SUFFIX = ".gz"; public static void main(String[] args) { for (int i = 0; i < args.length; i++) { try { InputStream fin = new FileInputStream(args[i]); OutputStream fout = new FileOutputStream(args[i] + GZIP_SUFFIX); GZIPOutputStream gzout = new GZIPOutputStream(fout); for (int c = fin.read(); c != -1; c = fin.read()) { gzout.write(c); } gzout.close(); } catch (IOException ex) { System.err.println(ex); } } } }