LocalDateTime add millisecond

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I want to increase the millisecond value with LocalDateTime. I used plusNanos because I didn't have plusmillisecond. I wonder if this is the right way. I'm using JDK 1.8. I also want to know if there is a plus millisecond function in later versions.

DateTimeFormatter f = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS");
LocalDateTime ldt = LocalDateTime.parse("2022-01-01 00:00:00.123",f);
        
System.out.println(ldt.format(f));
        
ldt = ldt.plusNanos(1000000);
        
System.out.println(ldt.format(f));

2022-01-01 00:00:00.123
2022-01-01 00:00:00.124


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