How to Add Or Subtract Weeks in Java

Here we will write an example to add or substract weeks in current date and time values with java Calendar class.

Source Code

package com.beginner.examples;

import java.util.Calendar;

public class ASWeeksExample {

    public static void main(String[] args){
    	//get calendar
    	Calendar now = Calendar.getInstance();
    	System.out.println(now.get(Calendar.WEEK_OF_YEAR));
		//weeks add 1
    	now.add(Calendar.WEEK_OF_YEAR, 1);
		System.out.println(now.get(Calendar.WEEK_OF_YEAR));
		//weeks subtract 1
		now.add(Calendar.WEEK_OF_YEAR, -1);
		System.out.println(now.get(Calendar.WEEK_OF_YEAR));
	}
}

Output:

22
23
22

References

Imported packages in Java documentation:

Calendar