發表者討論內容

冷日
(冷日) 發表時間：2016/11/14 2:11

Webmaster

註冊日: 2008/2/19
來自:
發表數: 15773

[轉貼]Java – How to get current date time – date() and calender()

Java – How to get current date time – date() and calender()

By mkyong | December 24, 2009 | Updated : August 6, 2014 | Viewed : 1,965,056 times +8,288 pv/w

In Java, you can get the current date time via following two classes – Date and Calendar. And, later use SimpleDateFormat class to convert the date into a user friendly format.
1. Date() + SimpleDateFormat()

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
System.out.println(dateFormat.format(date)); //2014/08/06 15:59:48

2. Calender() + SimpleDateFormat()

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Calendar cal = Calendar.getInstance();
System.out.println(dateFormat.format(cal.getTime())); //2014/08/06 16:00:22

Review a full example to show you how to use Date() and Calender() classes to get and display the current date time.

GetCurrentDateTime.java

package com.mkyong;

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("yyyy/MM/dd HH:mm:ss");
	   //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()));

  }
}

Output