get week number from localdate java

To get the week number from a LocalDate object in Java, you can use the get(WeekFields.weekOfWeekBasedYear()) method of the LocalDate class. This method returns the week number within the week-based-year, as defined by the WeekFields class.

Here's an example of how you could use this method to get the week number from a LocalDate object:

import java.time.LocalDate;
import java.time.temporal.WeekFields;

LocalDate date = LocalDate.of(2022, 12, 20);
int weekNumber = date.get(WeekFields.weekOfWeekBasedYear());
System.out.println("Week number: " + weekNumber);

This code will output "Week number: 51", because December 20, 2022 is in week 51 of the week-based-year 2022.

Note that the week number may be different depending on the first day of the week and the minimal days in the first week, which are also defined by the WeekFields class. By default, the first day of the week is Monday and the minimal days in the first week is 4.