Interfaces for Custom Date and Time Manipulation in Java

Write a Java program to demonstrate the use of an interface for custom date and time manipulation

The DateTimeManipulator interface declares a single method formatDateTime that takes a LocalDateTime object and a pattern string, and returns the formatted date and time string.
In the main method of the Main class, an instance of the DateTimeManipulator interface is created using a lambda expression. Inside the lambda expression, the DateTimeFormatter class is used to format the LocalDateTime object according to the provided pattern.
The current date and time is obtained using LocalDateTime.now().
The pattern for formatting is defined.
The formatDateTime method of the DateTimeManipulator interface is called with the current date and time and the pattern.
The formatted date and time is printed to the console.

Source Code

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
 
interface DateTimeManipulator
{
	String formatDateTime(LocalDateTime dateTime, String pattern);
}
 
public class Main
{
	public static void main(String[] args)
	{
		DateTimeManipulator dateTimeManipulator = (dateTime, pattern) -> {
			DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
			return dateTime.format(formatter);
		};
 
		LocalDateTime now = LocalDateTime.now();
		String formattedDateTime = dateTimeManipulator.formatDateTime(now, "dd-MM-yyyy HH:mm:ss");
 
		System.out.println("Formatted Date and Time : " + formattedDateTime);
	}
}

Output

Formatted Date and Time : 29-11-2023 04:25:17

Interfaces for Custom Date and Time Manipulation in Java

Source Code

Output

Example Programs

Interface Programs in Java