How to get the current timestamp in Java

Read Time:7 Minute, 47 Second

Table of Contents

In Java, getting the current timestamp is simple. We’ll learn how to acquire the timestamp using the Date and Timestamp classes in this lesson. This article provides some Java examples for obtaining the current date, time, or timestamp. In addition, Java 8 has been included.

The timestamp represents the date and time of an occurrence. It can be the date and time when a particular input or output was made or any other internal computer event, such as adding specific data into a database in computers. Now’s timestamp is the current timestamp. If an event occurs now and the timestamp is recorded, the timestamp will be that of yesterday tomorrow.

A local timestamp, GMT timestamp, and UTC timestamp are all available. The local timestamp is the date-time used for your nation’s legal, commercial, and social purposes. The reference for GMT and UTC timestamps is the same. A time zone is a country offset that can be applied to UTC to get your local time. A time zone of +03:30 signifies that the UTC has been extended by 3 hours and 30 minutes.

The year, month, and day of the month are all included in the date portion of the timestamp. The timestamp’s time component includes at least the hour, minutes, and seconds. Milliseconds and the time zone might also be included (offset). Note that 1 ms = 1/1000 s. Therefore, the computer should provide the timestamp. As a result, the system clock must be accurate. java.time is the class. In today’s Java, instant should be used to get the timestamp.

java.time.Instant

Java has a class called java.time.The instant was explicitly created for timestamps. There are two required methods in the Instant class: now () and toString (). The timestamp object is returned by “Now.” The timestamp’s string format is produced by toString(). The following program demonstrates their application:

SUGGESTED READ

The program starts with the Instant class from java.time package being imported. Then there’s the main class’s definition (implementation). The first statement in the main() method calls the Instant class’s now() method. Now() is a static method, which means it doesn’t require the instantiated object to work. It returns the timestamp object of its Instant class by using the Instant class name. The timestamp Instant object’s toString() method returns the timestamp object’s readable string in ISO-8601 format. The computer generates the following output at the time when run:

This needs further explanation. The first four digits represent the event’s year. It is separated from the following two numerals, the month of the event, by a hyphen. The latter is separated from the next two digits, the day of the month of the event, by a hyphen. A timestamp comprises two parts: the date and the time. The ‘T’ separates the date and time sections. The time section starts with two digits (24-hour clock), the event’s hour. It is separated from the following two digits, which represent the minutes of the occurrence, by a colon.

It is followed by a colon, which separates it from the following two numerals, representing the event’s seconds. There are also the dot and microseconds to consider. The timestamp has no offset if it is Z. Note that toString() is a dynamic method. To work, it requires an initialized Instant object. It also gives you a string that you can save (in a database).

Epoch of Java

In Java, time is calculated using the UNIX Epoch. 1970-01-01T00:00:00Z is the UNIX Epoch.

The number of seconds since the Java Epoch

Since Java Epoch, the following application calculates the number of seconds:

SUGGESTED READ

The getEpochSecond() function of the Instant object is used. It gives back a long integer.

instant minusSeconds(long secondsToSubtract)

With several seconds subtracted, the current date-time can be returned. It will produce a datetime before now. It is demonstrated in the following program:

Before subtracting the number of seconds, you must collect the current timestamp object. The following is the main method used:

It only works with immediate objects, not instant classes (name).

With several seconds appended, the current date-time can be returned. After that, you’ll have datetime. It is demonstrated in the following program:

SUGGESTED READ

You must obtain the current timestamp object before the amount of seconds is added. The following is the main method used:

It only works with immediate objects, not instant classes (name).

Instant Class’s Static Properties

EPOCH, MAX, and MIN are the Instant class’s static attributes (fields). The instantiated object is not required to access a static property. It works with the name of the class. EPOCH is,

As expected, the resultant output is, 1970-01-01T00:00:00Z

MAX gives the maximum supported Instant. The value for MAX is output in string form using the following program:

SUGGESTED READ

MIN returns the slightest supported Instant. The value for MIN is output in string form using the following program:

Using Java’s Timestamp Class to Get the Current Timestamp

The Timestamp class in Java is used to get the current timestamp. We pass the time in milliseconds because this class does not have a default constructor. We use the System class’s currentTimeMillis() method to get the time. Consider the following example.

Using Java’s Date Class, get the current timestamp

We can utilize the util package’s Date class to acquire the current timestamp. The SimpleDateFormat class is used to format the timestamp in the yyyy.MM.dd format. Consider the following example.

Java’s uses the ZonedDateTime class to get the current Timestamp

The Java datetime package’s ZonedDateTime class generates a timestamp with zone information. We get the system’s default zone using the systemDefault() function of ZoneId, and we get the current timestamp with the supplied zoneId using the now() method. After obtaining the current timestamp, we utilize the DateTimeFormatter class’s ofPattern() function to get the timestamp in a particular format. Consider the following example.

Java’s use of the LocalDateTime class to get the current timestamp

Using Java 8, you can acquire the current timestamp by using the LocalDateTime class. Consider the following example.

SUGGESTED READ

Java’s use of the Instant Class to get the current timestamp

The current timestamp can be obtained using the Instant class. To get the current timestamp in instants, we use the now() function of the Instant class.

Using Java’s Timestamp Class to Get the Current Timestamp

The Timestamp and Instant classes provide another way to obtain the current timestamp in Java. Consider the following example.

Java’s use of the toInstant() method to get the current timestamp

Further, we can engage the toInstant() method of the Date class to acquire the current timestamp if we have a date object reflecting the timestamp.

Example: Java Get TimeStamp

The getTime() function is used in the following example to obtain the current time in milliseconds. The timestamp will then convert to the correct time. The following example is multi-line. However, if you only want the current timestamp, use the one-line code above.

Example: Only get the date in Java

To find the date and time solely, use SimpleDateFormat with the Calendar class.

SUGGESTED READ

Example: Fetch The current Time in Java

You may also use SimpleDateFormat with the Calendar class to find the time only.

Example: Illustrating the use of Timestamp

Example: Java timestamps

The following software utilizes java.sql.Timestamp to acquire the current timestamp and SimpleDateFormat to format the display.

Example: Instant to or from the Timestamp Converter

This example demonstrates how to use the new Java 8 java.time class. To and from the legacy java.sql.Timestamp is instant.

Example: Create a table with a timestamp

In JDBC programming, the timestamp is still extensively utilized. Consider the following conversions:

Example: How to get the current timestamp in java

The actions we took in the example above are as follows:

SUGGESTED READ

1) Created a Date class object.

2) Using the getTime() method of Date, we obtained the current time in milliseconds.

3) Created a Timtestamp class object and supplied the milliseconds obtained in step 2 to the class’s constructor during object construction. The latter creates the timestamp from the millisecond value provided.

Conclusion

This lesson has shown you how to retrieve the current timestamp in Java and includes some sample code to help you grasp the concept. The Timestamp class, Date class, ZonedDateTime class, LocalDateTime class, and other Java classes can all be used to get the current timestamp.

The timestamp represents the date and time of an occurrence. Now’s timestamp is the current timestamp. The Java package’s Instant class, java.time.*, should be utilized for timestamp work. Also, note that the timestamp class has two important methods: now() and toString ().

SUGGESTED READ

Source: https://www.codeunderscored.com/how-to-get-the-current-timestamp-in-java/

WP Ad Inserter plugin for WordPress

Tag Cloud

Java Java Logical Programs OTP Generation in Java python Recursion youtube video ASCII Upper and Lower Case blockchain javascript graph learn to code software development Successful Software Engineers breadth first search Java Array Programs Java Programs Uncategorized android ios programming kotlin web-development django data sql cybersecurity database swiftui serverless aws swift rust react background-position gradients loader mask grid nth-child pseudo elements indieweb WordPress Print Array without brackets C++ factorial Java String Programs Final Keyword Static Variable Axie Infinity Cryptokitties NFT games tool inserting MISC Tips Codes python code python projects python3 system info python project Bigginers How to Do Integrations Payment Gateways PHP checkout page in php Implement stripe payment gateway in Step by step in PHP integrate stripe gatway in php mysql payment gateway integration in php step by step payment gateway integration in php step by step with source code payment gateway integration in website PHP Integrate Stripe Payment Gateway Tutorial PHP shopping cart checkout code shopping cart in php stripe php checkout PHP/MySQL/JSON best international payment gateway does google pay accept international payments how to accept international payments in india paytm payment gateway razorpay codeigniter github razorpay custom checkout github razorpay get payment details razorpay integration in codeigniter github razorpay international payments Razorpay payment gateway integration in CodeIgniter razorpay payment gateway integration in php code Razorpay payment gateway integration with PHP and CodeIgniter Razorpay payment gateway setup in CodeIgniter Library & Frameworks Tips & Tricks UI/UX & Front-end coding birds online html code for google sign in login with google account in PHP login with google account using javascript login with google account using javascript codeigniter login with google account using php login with google account using php source code
How to read a text file in Python Previous post How to read a text file in Python
8 things about Records in C# you probably didn’t know Next post 8 things about Records in C# you probably didn’t know

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.