Question

How to get milliseconds from LocalDateTime in Java

Answer 1

import java.time.LocalDateTime;
import java.time.ZoneId;

public class MyClass {
    public static void main(String args[]) {
        LocalDateTime localDateTime = LocalDateTime.now();
        
        long milliseconds = localDateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
        
        System.out.println(milliseconds);    
    }
}
     
     
     
     
/*
run:
     
1699458675114

*/

 

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Answer 2

import java.time.LocalDateTime;
import java.time.ZonedDateTime;
import java.time.ZoneId;

public class MyClass {
    public static void main(String args[]) {
        LocalDateTime localDateTime = LocalDateTime.now();
  
        ZonedDateTime zdt = ZonedDateTime.of(localDateTime, ZoneId.systemDefault());
        
        long milliseconds = zdt.toInstant().toEpochMilli();
  
        System.out.println(milliseconds);    
    }
}
     
     
     
     
/*
run:
     
1699458892798

*/

 

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Answer 3

import java.time.LocalDateTime;
import java.time.ZonedDateTime;
import java.time.ZoneId;

public class MyClass {
    public static void main(String args[]) {
        LocalDateTime localDateTime = LocalDateTime.of(2023, 11, 8, 17, 15, 10);
  
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.of("America/Los_Angeles"));
        
        long milliseconds = zdt.toInstant().toEpochMilli();
  
        System.out.println(milliseconds);    
    }
}
     
     
     
     
/*
run:
     
1699492510000

*/

 

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