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Java LocalDateTime Class | minusHours() Method with Example

LocalDateTime Class minusHours() method: Here, we are going to learn about the minusHours() method of LocalDateTime Class with its syntax and example.
Submitted by Preeti Jain, on June 07, 2020

LocalDateTime Class minusHours() method

• minusHours() method is available in java.time package.
• minusHours() method is used to subtract the given hours from this date-time and return the LocalDateTime.
• minusHours() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• minusHours() method may throw an exception at the time of performing subtraction.
  DateTimeException – This exception may throw when the calculated result value exceeds the limit.

Syntax:

    public LocalDateTime minusHours(long hrs_val);

Parameter(s):

• long hrs_val – represents the hours to be subtracted from this LocalDateTime.

Return value:

The return type of this method is LocalDateTime, it returns the LocalDateTime that holds the value subtracted the given hours from this LocalDateTime.

Example:

// Java program to demonstrate the example 
// of minusHours(long hrs_val) method 
// of LocalDateTime

import java.time.*;

public class MinusHoursOfLocalDateTime {
    public static void main(String args[]) {

        long hours = 6;
        // Instantiates two LocalDateTime
        LocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10.00");
        LocalDateTime da_ti2 = LocalDateTime.now();

        // Display da_ti1, da_ti2 and
        // hours
        System.out.println("LocalDateTime da_ti1 and da_ti2: ");
        System.out.println("da_ti1: " + da_ti1);
        System.out.println("da_ti2: " + da_ti2);
        System.out.println("hours to subtract: " + hours);

        System.out.println();

        // Here, this method subtracts the given
        // hours from this date-time object
        // i.e. here we are subracting 6 hrs from 
        // this object da_ti1
        LocalDateTime minus_hrs = da_ti1.minusHours(hours);

        // Display minus_hrs
        System.out.print("da_ti1.minusHours(hours): ");
        System.out.println(minus_hrs);

        // Here, this method subtracts the given 
        // hours from this date-time object 
        // i.e.here we are subracting 6 hrs from 
        // this object da_ti2
        minus_hrs = da_ti2.minusHours(hours);

        // Display minus_hrs
        System.out.print("da_ti2.minusHours(hours): ");
        System.out.println(minus_hrs);
    }
}

Output

LocalDateTime da_ti1 and da_ti2: 
da_ti1: 2005-10-05T10:10:10
da_ti2: 2020-06-07T16:02:54.240351
hours to subtract: 6

da_ti1.minusHours(hours): 2005-10-05T04:10:10
da_ti2.minusHours(hours): 2020-06-07T10:02:54.240351