import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;

public class GzipFileDecompressor {
    public static void decompressGzipFile(String gzipFile, String newFile) {
        byte[] buffer = new byte[1024];
        
        try (GZIPInputStream gzis = new GZIPInputStream(new FileInputStream(gzipFile));
             FileOutputStream out = new FileOutputStream(newFile)) {

            int len;
            while ((len = gzis.read(buffer)) > 0) {
                out.write(buffer, 0, len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String gzippedFile = "compressed.gz";
        String decompressedFile = "decompressed.txt";
        
        decompressGzipFile(gzippedFile, decompressedFile);
    }
}