The TemporalAdjusters class, part of java.time.temporal, provides common date adjustment operations as static methods that return TemporalAdjuster instances. These are used with date-time objects to manipulate or align them to significant calendar dates—like the first day of the month, next Monday, etc.
Commonly Used Methods
Simple Program
import java.time.LocalDate;
import java.time.temporal.TemporalAdjusters;
import java.time.DayOfWeek;
public class TemporalAdjusterExample {
public static void main(String[] args) {
LocalDate today = LocalDate.now();
LocalDate firstDay = today.with(TemporalAdjusters.firstDayOfMonth());
LocalDate nextMonday = today.with(TemporalAdjusters.next(DayOfWeek.MONDAY));
LocalDate lastDay = today.with(TemporalAdjusters.lastDayOfYear());
System.out.println("Today: " + today);
System.out.println("First Day of Month: " + firstDay);
System.out.println("Next Monday: " + nextMonday);
System.out.println("Last Day of Year: " + lastDay);
}
}Problem Statement
LotusJavaPrince and Mahesh are building a leave management system for employees. The system must:
- Automatically find the next Friday for optional leave.
- Identify the last day of the month for payroll processing.
- Find the first Monday of the next month for scheduling training.
- Ensure all adjustments are dynamic based on today’s date.
import java.time.LocalDate;
import java.time.DayOfWeek;
import java.time.temporal.TemporalAdjusters;
public class LeaveSystem {
public static void main(String[] args) {
System.out.println("Leave Management System by LotusJavaPrince & Mahesh");
LocalDate today = LocalDate.now();
LocalDate nextFriday = today.with(TemporalAdjusters.next(DayOfWeek.FRIDAY));
LocalDate payrollDate = today.with(TemporalAdjusters.lastDayOfMonth());
LocalDate firstMondayNextMonth = today
.with(TemporalAdjusters.firstDayOfNextMonth())
.with(TemporalAdjusters.nextOrSame(DayOfWeek.MONDAY));
System.out.println("Today's Date: " + today);
System.out.println("Next Optional Leave (Friday): " + nextFriday);
System.out.println("Payroll Processing Date: " + payrollDate);
System.out.println("First Training Monday of Next Month: " + firstMondayNextMonth);
}
}
/*
Leave Management System by LotusJavaPrince & Mahesh
Today's Date: 2025-05-22
Next Optional Leave (Friday): 2025-05-23
Payroll Processing Date: 2025-05-31
First Training Monday of Next Month: 2025-06-02
*/The TemporalAdjusters class is a powerful utility for manipulating and navigating calendar dates based on logical rules. It is ideal for:
- Business rule-based date computation.
- Employee scheduling, payroll systems, and event planning.
- Reducing boilerplate logic for date calculations.