Дата і час
import java.time.format.DateTimeFormatter;
import java.time.LocalDateTime;
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
LocalDateTime now = LocalDateTime.now();
System.out.println(dtf.format(now));
import java.text.SimpleDateFormat;
import java.util.Date;
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
Date date = new Date();
System.out.println(formatter.format(date));