Java Program to Display Dates of Calendar Year in Different Format

In this article, we will understand how to display dates of calendar year in different format. Java does not have a built-in Date class, but we can import the java.time package to work with the date and time API. The package includes many date and time classes.

Below is a demonstration of the same −

Suppose our input is −

Run the program

The desired output would be −

The first date format is:2022-03-17T23:37:37.623304800
The second date format is:17/03/2022
The third date format is:Thursday, 17 Mar 2022

Algorithm

Step 1 - START
Step 2 - Declare an object of LocalDateTime namely date.
Step 3 - Define the values.
Step 4 - Define different date time formats using DateTimeFormatter objects
Step 5 - Display the different date time formats
Step 6 - Stop

Example 1

Here, we bind all the operations together under the ‘main’ function.

import java.time.*;
import java.time.format.DateTimeFormatter;
public class Demo {
   public static void main(String[] args){
      System.out.println("The required packages have been imported");
      LocalDateTime date = LocalDateTime.now();
      System.out.println("A LocalDateTime object has been defined");
      System.out.println("\nThe first date format is:" +date);
      DateTimeFormatter date_format_1 = DateTimeFormatter.ofPattern("dd/MM/yyyy");
      String formattedDate_1 = date.format(date_format_1);
      System.out.println("\nThe second date format is:" +formattedDate_1);
      DateTimeFormatter date_format_2 = DateTimeFormatter.ofPattern("EEEE, dd MMM yyyy");
      String formattedDate_2 = date.format(date_format_2);
      System.out.println("\nThe third date format is:" +formattedDate_2);
   }
}

Output

The required packages have been imported
A LocalDateTime object has been defined

The first date format is:2022-03-29T08:53:19.809

The second date format is:29/03/2022

The third date format is:Tuesday, 29 Mar 2022

Example 2

Here, we encapsulate the operations into functions exhibiting object oriented programming.

import java.time.*;
import java.time.format.DateTimeFormatter;
public class Demo {
   static void print_date_format(LocalDateTime date){
      DateTimeFormatter date_format_1 = DateTimeFormatter.ofPattern("dd/MM/yyyy");
      String formattedDate_1 = date.format(date_format_1);
      System.out.println("\nThe second date format is:" +formattedDate_1);
      DateTimeFormatter date_format_2 = DateTimeFormatter.ofPattern("EEEE, dd MMM yyyy");
      String formattedDate_2 = date.format(date_format_2);
      System.out.println("\nThe third date format is:" +formattedDate_2);
   }
   public static void main(String[] args){
      System.out.println("The required packages have been imported");
      LocalDateTime date = LocalDateTime.now();
      System.out.println("A LocalDateTime object has been defined");
      System.out.println("\nThe first date format is:" +date);
      print_date_format(date);
   }
}

Output

The required packages have been imported
A LocalDateTime object has been defined

The first date format is:2022-03-29T08:53:58.155

The second date format is:29/03/2022

The third date format is:Tuesday, 29 Mar 2022