How to exceed away electrical flow TimeStamp value inwards Java

Do y'all know that Java developer Google for fifty-fifty simplest of things? Yes, that's truthful in addition to I tin sack country it because fifty-fifty I create that :-). The electrical flow timestamp value is i of them. In UNIX y'all tin sack only purpose the appointment ascendance to acquire the electrical flow appointment in addition to fourth dimension but how create y'all acquire that inwards your Java program? Well, y'all tin sack acquire the electrical flow timestamp inwards Java yesteryear using Date in addition to Timestamp shape of JDK. Note, in that place is "s" instead of "S" inwards Timestamp. Since Date inwards Java contains both appointment in addition to time, it tin sack survive used every bit Timestamp value every bit good but when y'all impress Date, it shows fourth dimension inwards the local timezone. If y'all postulate just the timestamp, in addition to thus y'all postulate to convert the java.util.Date to java.sql.Timestamp. You tin sack convert a Date to Timestamp yesteryear using the getTime() method which returns the release of millisecond from the Epoch.

You should likewise retrieve that Timestamp is a subclass of java.util.Date but doesn't laurels Liskov commutation principle, which agency y'all cannot transcend a Timestamp when Date is expected. Why? because it likewise includes additional nanosecond value which is fitted in that place to confirm database DATETIME value, which supports nanosecond precision. You tin sack likewise read my post why Timestamp cannot survive used inwards house of Date inwards Java for to a greater extent than details.

Btw, In Java 8, y'all tin sack likewise purpose the LocalDateTime class to acquire the electrical flow timestamp inwards Java. In this article, I'll demonstrate y'all a duo of ways to acquire the electrical flow timestamp value. If y'all are interested to acquire to a greater extent than most novel features of Java SE 8 including Date in addition to Time API, lambda expressions, streams, in addition to other modest enhancement e.g. joining String using String.join() methods, delight see Java SE 8 for Really Impatient By Cay S. Horstmann.

Current Timestamp inwards Java

Here is a sample code snippet y'all tin sack purpose to retrieve the electrical flow timestamp value using java.util.Date shape in addition to java.sql.Timestamp inwards Java. Remember the java.util.Date shape is named Date, but. it contains both appointment in addition to fourth dimension value, dissimilar LocalDate shape of Java 8, which entirely contains Date information without whatever fourth dimension details. There is a split shape LocalTime for representing fourth dimension without appointment in addition to LocalDateTime to correspond appointment amongst time.

On the other hand, java.sql.Timestamp is a subclass of Date but has additional nanosecond value for to a greater extent than precision in addition to survive compatible amongst DATETIME type of many relational database e.g. SQL Server, MySQL, in addition to Oracle.

Anyway, hither is our code prior to Java 8 world:

Date immediately = new java.util.Date(); Timestamp electrical flow = new java.sql.Timestamp(now.getTime()); System.out.println("current timestamp: " + current); System.out.println("current date: " + now);  Output electrical flow timestamp: 2016-06-16 17:33:14.53 electrical flow date: Thu Jun xvi 17:33:14 SGT 2016

If y'all run this program, it volition impress the electrical flow appointment in addition to fourth dimension value, only essay that earlier y'all read further.

Do y'all know that Java developer Google for fifty-fifty simplest of things How to acquire electrical flow TimeStamp value inwards Java

Btw, if y'all desire your electrical flow timestamp into a different String format e.g. "yyyy.MM.dd.HH.mm.ss" in addition to thus y'all postulate to purpose the SimpleDateFormat shape to format the timestamp every bit shown below:

String timeStamp = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss").format(current); System.out.println("current timestamp every bit yyyy.MM.dd.HH.mm.ss " + timeStamp);  Output electrical flow timestamp every bit yyyy.MM.dd.HH.mm.ss 2016.06.16.17.41.19

You tin sack format the appointment to whatever way y'all want, only survive aware of the syntax used for formatting dates inwards Java every bit shown here. Btw, these are non the entirely way to acquire the electrical flow timestamp value, for example, if y'all only postulate long milliseconds from the 1st Jan 1970 in addition to thus y'all tin sack purpose the System.currentTimeMillis() which supply millisecond from Epoch and System.nanoTime() which supply the electrical flow timestamp value inwards nanoseconds.

You tin sack likewise read a expert Java mass e.g. Core Java for Impatient yesteryear Cay S. Horstmann to acquire to a greater extent than most fundamentals of Java e.g. date, time, in addition to calendar shape inwards Java. It fifty-fifty covers Java SE 8 novel Date in addition to Time API, which is only a bonus.

Java Program to acquire electrical flow Timestamp value

hither is our sample Java plan to acquire the electrical flow fourth dimension postage stamp value. You tin sack run it, tweak it to sympathize what nosotros are doing. It's simple, nosotros are only converting a appointment to the timestamp to acquire the electrical flow timestamp value. Later nosotros are formatting into the required format using the SimpleDateFormat class, i of the utility shape but survive careful it's non thread-safe, encounter here to acquire to a greater extent than most using SimpleDateFormat shape inwards Java.

package test;  import java.sql.Timestamp; import java.text.SimpleDateFormat; import java.util.Date;  /**  * Java Program to acquire electrical flow Timestamp value  */ public class TimestampTest {    public static void main(String[] args) {      Date immediately = new java.util.Date();     Timestamp electrical flow = new java.sql.Timestamp(now.getTime());     System.out.println("current timestamp: " + current);     System.out.println("current date: " + now);      // printing electrical flow timestamp every bit "yyyy.MM.dd.HH.mm.ss"     String timeStamp = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss")         .format(current);     System.out.println("current timestamp every bit yyyy.MM.dd.HH.mm.ss " + timeStamp);    }  }  Output electrical flow timestamp: 2016-06-16 17:41:19.305 electrical flow date: Thu Jun xvi 17:41:19 SGT 2016 electrical flow timestamp every bit yyyy.MM.dd.HH.mm.ss 2016.06.16.17.41.19

That's all most how to acquire the electrical flow timestamp value inwards Java. Just remember, that Timestamp is a shape inwards the java.sql parcel in addition to its elevate include "s" non "S". If y'all postulate a long timestamp value in addition to thus y'all tin sack likewise convert a java.util.Date to Timestamp yesteryear using getTime() method which supply a release of millisecond from Epoch time. Other alternatives include System.currentTimeMillis() which supply millisecond from Epoch and System.nanoTime() which supply the electrical flow timestamp value inwards nanoseconds.

Other Date in addition to Time tutorials for Java developers

How to convert java.sql.Date to java.util.Date inwards Java? (example)
How to format Date inwards Java using SimpleDateFormat? (example)
How to display Date inwards multiple timezones inwards Java? (example)
How to convert java.util.Date to java.sql.Timestamp inwards JDBC? (example)
How to convert String to Date inwards Java? (answer)
Difference betwixt java.util.Date in addition to java.sql.Timestamp inwards JDBC? (answer)
How to convert java.util.Date to java.sql.Date inwards JDBC? (answer)
How to parse String to Date inwards Java using JodaTime library? (example)