Java/File Input Output/InflaterInputStream

InflaterInputStream to unzip

 
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.InflaterInputStream;
public class Main {
  public static void main(String[] args) throws Exception {
    FileInputStream fin = new FileInputStream("a.dat");
    InflaterInputStream iis = new InflaterInputStream(fin);
    FileOutputStream fout = new FileOutputStream("b.dat");
    for (int c = iis.read(); c != -1; c = iis.read()) {
      fout.write(c);
    }
    fout.close();
  }
}