Java – How to get current date time

1. Code Snippets

For java.util.Date, just create a new Date()

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");

Date date = new Date();

System.out.println(dateFormat.format(date)); //2016/11/16 12:08:43

For java.util.Calendar, uses Calendar.getInstance()

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");

Calendar cal = Calendar.getInstance();

System.out.println(dateFormat.format(cal)); //2016/11/16 12:08:43

For java.time.LocalDateTime, uses LocalDateTime.now()

DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");

LocalDateTime now = LocalDateTime.now();

System.out.println(dtf.format(now)); //2016/11/16 12:08:43

For java.time.LocalDate, uses LocalDate.now()

DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");

LocalDate localDate = LocalDate.now();

System.out.println(dtf.format(localDate)); //2016/11/16

2. Full Example

Review a full Java example to show you how to get the current date, time and display in a predefined format.

GetCurrentDateTime.java

package com.mkyong;

import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.time.LocalDateTime;

import java.time.format.DateTimeFormatter;

import java.util.Calendar;

import java.util.Date;

public class GetCurrentDateTime {

private static final DateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");

private static final DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");

public static void main(String[] args) {

Date date = new Date();

System.out.println(sdf.format(date));

Calendar cal = Calendar.getInstance();

System.out.println(sdf.format(cal.getTime()));

LocalDateTime now = LocalDateTime.now();

System.out.println(dtf.format(now));

LocalDate localDate = LocalDate.now();

System.out.println(DateTimeFormatter.ofPattern("yyy/MM/dd").format(localDate));

}

}

Output

2016/11/16 12:08:43

2016/11/16 12:08:43

2016/11/16 12:08:43

2016/11/16


此随笔或为自己所写、或为转载于网络。仅用于个人收集及备忘。