A java program to get current date time using the java.time.Instant class. Check the blog post at https://coderolls.com/get-current-date-time-in-java/

InstantExample.java

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

/**
 * A java program to get current date time using the java.time.Instant class
 * @author Gaurav Kukade at coderolls.com
 */
public class InstantExample {

	public static void main(String[] args) {
		
		Instant instant = Instant.now();
		
		// print instant object
		System.out.println(instant);  // 2021-05-15T10:11:45.331237189Z
		
		// get epoch time in milliseconds
		// epoch timestamp is number of milliseconds/seconds since January 1, 1970, 00:00:00 GMT
		System.out.println(instant.toEpochMilli()); // 1621073505331
		
		// get epoch time in seconds 
		System.out.println(instant.getEpochSecond());  // 1621073505
		
		// we can convert instant to LocalDateTime, LocalDate, LocalTime
		DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("dd/MM/yyyy HH:mm:ss");
		LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
		System.out.println(dateTimeFormatter.format(localDateTime)); // 15/05/2021 15:41:45

	}

}