Print current time in milliseconds in Java

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Locale;

public class PrintCurrentTime {

   public static void main(String[] args) {
      //Get current time in milliseconds
      long currentTimeInMilliseconds = System.currentTimeMillis();
      //Print current time in milliseconds
      System.out.println("Current time in milliseconds: " + currentTimeInMilliseconds);

      //Get current time in seconds
      long currentTimeInSeconds = System.currentTimeMillis() / 1000;
      //Print current time in seconds
      System.out.println("Current time in seconds: " + currentTimeInSeconds);

      //Get current time in minutes
      long currentTimeInMinutes = System.currentTimeMillis() / (60 * 1000);
      //Print current time in minutes
      System.out.println("Current time in minutes: " + currentTimeInMinutes);

      //Get current time in hours
      long currentTimeInHours = System.currentTimeMillis() / (60 * 60 * 1000);
      //Print current time in hours
      System.out.println("Current time in hours: " + currentTimeInHours);

      //Get current time in days
      long currentTimeInDays = System.currentTimeMillis() / (24 * 60 * 60 * 1000);
      //Print current time in days
      System.out.println("Current time in days: " + currentTimeInDays);

      //Get current time in months
      long currentTimeInMonths = System.currentTimeMillis() / (30 * 24 * 60 * 60 * 1000);
      //Print current time in months
      System.out.println("Current time in months: " + currentTimeInMonths);

      //Get current time in years
      long currentTimeInYears = System.currentTimeMillis() / (365 * 24 * 60 * 60 * 1000);
      //Print current time in years
      System.out.println("Current time in years: " + currentTimeInYears);

      //Get current date and time using Date class
      Date date = new Date();
      //Print date and time using Date class
      System.out.println("Current date and time using Date class: " + date);

      //Get current date and time using LocalDateTime class
      LocalDateTime localDateTime = LocalDateTime.now();
      //Print date and time using LocalDateTime class
      System.out.println("Current date and time using LocalDateTime class: " + localDateTime);

      //Get current date and time using Instant class
      Instant instant = Instant.now();
      //Print date and time using Instant class
      System.out.println("Current date and time using Instant class: " + instant);

      //Get current date and time using DateTimeFormatter class
      DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm:ss");
      String formattedDateTime = formatter.format(localDateTime);
      //Print date and time using DateTimeFormatter class
      System.out.println("Current date and time using DateTimeFormatter class: " + formattedDateTime);

   }
}