import java.util.Calendar;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date today = new Date();
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DATE, -1);
Date yesterday = calendar.getTime();
if (yesterday.before(today)) {
System.out.println(yesterday + " is before " + today);
}
}
}