Current Date and Time in Java

This piece of code returns the date in the format year/month/day and the current time in the format hour/minute/second. HH in uppercase returns the 24-hour time system.

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

Output

2015/07/22 18:36:43

Calendar and SimpleDateFormat

DateFormat format = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"); 
Calendar calendar = Calendar.getInstance(); 
System.out.println(format.format(calendar.getTime())); 

Runtime:

2015/07/22 18:39:24

Let's see the full code for using the Date and Calendar with the format predefined by the SimpleDateFormat and display the result:

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

public class getCurrentDate {

 public static void main(String[] args) {
 
 DateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss a"); 
 //get current date
 Date date = new Date(); 
 System.out.println(format.format(date)); 
 
 //get current time
 Calendar calendar = Calendar.getInstance(); 
 System.out.println(format.format(calendar.getTime())); 
 }
}

Runtime:

2015-07-22 06:50:55 PM
2015-07-22 06:50:55 PM

The time format hh:mm:ss a  returns the time system to 12 hours where the day is divided into two half-days of 12 hours each. AM for the period from midnight to noon and PM for the period from noon to midnight.