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Java LocalDateTime Class | minusWeeks() Method with Example

LocalDateTime Class minusWeeks() method: Here, we are going to learn about the minusWeeks() method of LocalDateTime Class with its syntax and example.
Submitted by Preeti Jain, on June 08, 2020

LocalDateTime Class minusWeeks() method

• minusWeeks() method is available in java.time package.
• minusWeeks() method is used to subtract the given weeks from this date-time object and return the LocalDateTime.
• minusWeeks() 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.
• minusWeeks() 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 minusWeeks(long weeks_val);

Parameter(s):

• long weeks_val – represents the weeks 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 weeks from this LocalDateTime.

Example:

// Java program to demonstrate the example 
// of minusWeeks(long weeks_val) method 
// of LocalDateTime

import java.time.*;

public class MinusWeeksOfLocalDateTime {
    public static void main(String args[]) {
        long weeks = 1;
        // 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
        // weeks
        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("weeks to subtract: " + weeks);

        System.out.println();

        // Here, this method subtracts the given
        // weeks from this date-time object 
        // i.e. here we are subracting 1 week from 
        // this object da_ti1
        LocalDateTime minus_weeks = da_ti1.minusWeeks(weeks);

        // Display minus_weeks
        System.out.print("da_ti1.minusWeeks(weeks): ");
        System.out.println(minus_weeks);

        // Here, this method subtracts the given
        // weeks from this date-time object i.e.
        // here we are subracting 1 week from 
        // this object da_ti2
        minus_weeks = da_ti2.minusWeeks(weeks);

        // Display minus_weeks
        System.out.print("da_ti2.minusWeeks(weeks): ");
        System.out.println(minus_weeks);
    }
}

Output

LocalDateTime da_ti1 and da_ti2: 
da_ti1: 2005-10-05T10:10:10
da_ti2: 2020-06-08T03:03:18.495162
weeks to subtract: 1

da_ti1.minusWeeks(weeks): 2005-09-28T10:10:10
da_ti2.minusWeeks(weeks): 2020-06-01T03:03:18.495162