Java > Reading and Writing Compressed Files

(Zip File)
import java.io.*;
import java.util.zip.*;

public class ReadGZIP {
    public static void main(String argv[]) throws IOException {

        String FILENAME = "file.txt.gz";

        // Since there are 4 constructors here, I wrote them all out in full.
        // In real life you would probably nest these constructor calls.

        FileInputStream fin = new FileInputStream(FILENAME);
        GZIPInputStream gzis = new GZIPInputStream(fin);
        InputStreamReader xover = new InputStreamReader(gzis);
        BufferedReader is = new BufferedReader(xover);

        String line;

        // Now read lines of text: the BufferedReader puts them in lines,
        // the InputStreamReader does Unicode conversion, and the
        // GZipInputStream "gunzip"s the data from the FileInputStream.

        while ((line = is.readLine( )) != null)
            System.out.println("Read: " + line);
    }
}