GetCurrentDateTime - lấy thời gian hiện tại

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package test;

import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

public class GetCurrentDateTime {

    public static void main(String[] args) {

        DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss dd/MM/yyyy");
        //get current date time with Date()
        Date date = new Date();
        System.out.println(dateFormat.format(date));

        //get current date time with Calendar()
        Calendar cal = Calendar.getInstance();
        System.out.println(dateFormat.format(cal.getTime()));

    }
}