Java LocalDateTime to Milliseconds

In Java, you can convert a LocalDateTime object to an Instant object using the toInstant method of the LocalDateTime class, and then call the toEpochMilli method to obtain the milliseconds value.

The example code is shown below:

import java.time.LocalDateTime;
import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        LocalDateTime localDateTime = LocalDateTime.now();
        
        Instant instant = localDateTime.toInstant();
        
        long milliseconds = instant.toEpochMilli();
        
        System.out.println("Milliseconds: " + milliseconds);
    }
}