Java - Adjust dates using TemporalAdjusters

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Introduction

Use a DateAdjuster to adjust today's date to the next Monday 

LocalDate nextMonday = today.with(TemporalAdjusters.next(DayOfWeek.MONDAY));

Use a DateAdjuster to adjust today's date to the last day of month 

LocalDate lastDayOfMonth = today.with(TemporalAdjusters.lastDayOfMonth());

Create an adjuster that returns a date after 3 months and 2 days 


TemporalAdjuster adjuster = 
    TemporalAdjusters.ofDateAdjuster((LocalDate date) -> date.plusMonths(3).plusDays(2));
LocalDate dayAfter3Mon2Day = today.with(adjuster);

Demo

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.temporal.TemporalAdjuster;
import java.time.temporal.TemporalAdjusters;

public class Main {
  public static void main(String[] args) {
    LocalDate today = LocalDate.now();
    System.out.println("Today: " + today);

    // Use a DateAdjuster to adjust today's date to the next Monday
    LocalDate nextMonday = today.with(TemporalAdjusters.next(DayOfWeek.MONDAY));
    System.out.println("Next Monday: " + nextMonday);

    // Use a DateAdjuster to adjust today's date to the last day of month
    LocalDate lastDayOfMonth = today.with(TemporalAdjusters.lastDayOfMonth());
    System.out.println("Last day of month: " + lastDayOfMonth);

    // Create an adjuster that returns a date after 3 months and 2 days
    TemporalAdjuster adjuster = TemporalAdjusters
        .ofDateAdjuster((LocalDate date) -> date.plusMonths(3).plusDays(2));
    LocalDate dayAfter3Mon2Day = today.with(adjuster);
    System.out.println("Date after adding 3 months and 2 days: "
        + dayAfter3Mon2Day);/* w w w  . j a  va 2 s . c  o  m*/
  }
}

Result

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