import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;
public class CompressIt {
public static void main(String[] args) {
String filename = args[0];
try {
File file = new File(filename);
int length = (int) file.length();
FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
ByteArrayOutputStream baos = new ByteArrayOutputStream(length);
GZIPOutputStream gos = new GZIPOutputStream(baos);
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = bis.read(buffer)) != -1) {
gos.write(buffer, 0, bytesRead);
}
bis.close();
gos.close();
System.out.println("Input Length: " + length);
System.out.println("Output Length: " + baos.size());
} catch (FileNotFoundException e) {
System.err.println("Invalid Filename");
} catch (IOException e) {
System.err.println("I/O Exception");
}
}
}