How to Determine First Day of the Week Using Java LocalDate

How to Determine Date of the First Day of the Week Using LocalDate in Java

Have you ever wanted to get the date of the first day of a week in Java? If so, this tutorial will help you. We will show you how to determine the date of the first day of a week using the LocalDate class in Java.

Prerequisites

• A basic understanding of Java programming language
• Knowledge of the LocalDate class

LocalDate Class

The LocalDate class is part of the java.time package in Java 8 or later. It is used to represent a date without a time-zone in the ISO-8601 calendar system. The LocalDate class has various methods for getting and manipulating dates. This makes it very useful for working with dates.

Determine the Date of the First Day of a Week

To determine the date of the first day of a week, we can use the method LocalDate.with(DayOfWeek.MONDAY). This will return the date of the Monday of the same week as the current date. We can then use the method LocalDate.minusDays() to get the date of the previous Sunday, which is the first day of the week.

// Get the current date.
LocalDate currentDate = LocalDate.now();

// Get the Monday of the same week.
LocalDate monday = currentDate.with(DayOfWeek.MONDAY);

// Calculate the date of the previous Sunday.
LocalDate sunday = monday.minusDays(1);

Using this method, we can easily determine the date of the first day of a week with the LocalDate class in Java.