java date where does it get its time from code example

Example 1: Get current date and time in java 8

// Get current date and time in java 8
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
public class CurrentDateTimeJava8 
{
   public static void main(String[] args) 
   {
      LocalDate ld = LocalDate.now();
      System.out.println("Current date: " + ld);
      // get current time value
      LocalTime lt = LocalTime.now();
      System.out.println("Current time: " + lt);
      // get current date-time value
      LocalDateTime ldt = LocalDateTime.now();
      System.out.println("Current date-time: " + ldt);
   }
}

Example 2: java how to get current time

import java.util.Calendar;
Date currentTime = Calendar.getInstance().getTime();