how to subtract localdatetime in java

To subtract two LocalDateTime objects in Java, you can use the minus method of the LocalDateTime class.

The minus method has several overloads that allow you to subtract different types of values from a LocalDateTime object. Here are some examples of how you can use the minus method to subtract values from a LocalDateTime object:

LocalDateTime dateTime = LocalDateTime.of(2022, 1, 1, 12, 0, 0);

// Subtract 1 day from the dateTime
LocalDateTime dateTime1 = dateTime.minus(1, ChronoUnit.DAYS);

// Subtract 1 hour from the dateTime
LocalDateTime dateTime2 = dateTime.minus(1, ChronoUnit.HOURS);

// Subtract 1 minute from the dateTime
LocalDateTime dateTime3 = dateTime.minus(1, ChronoUnit.MINUTES);

// Subtract 1 second from the dateTime
LocalDateTime dateTime4 = dateTime.minus(1, ChronoUnit.SECONDS);

This code will subtract 1 day, 1 hour, 1 minute, and 1 second from the dateTime object, respectively, and assign the resulting LocalDateTime objects to dateTime1, dateTime2, dateTime3, and dateTime4.

Note that the minus method returns a new LocalDateTime object, so the original dateTime object is not modified.

You can also use the minusDays, minusHours, minusMinutes, and minusSeconds methods of the LocalDateTime class to subtract specific values from a LocalDateTime object.