Java Program to adjust LocalDate to last Day of Month with TemporalAdjusters class

Let us first set a date:

LocalDate localDate = LocalDate.of(2019, Month.JUNE, 15)

Now, adjust LocalDate to last Day of month;

LocalDate day = localDate.with(TemporalAdjusters.lastDayOfMonth());

Example

import java.time.LocalDate;
import java.time.Month;
import java.time.temporal.TemporalAdjusters;
public class Demo {
   public static void main(String[] args) {
      LocalDate localDate = LocalDate.of(2019, Month.JUNE, 15);
      System.out.println("Current Date = "+localDate);
      System.out.println("Current Month = "+localDate.getMonth());
      LocalDate day = localDate.with(TemporalAdjusters.firstDayOfMonth());
      System.out.println("First day of month = "+day);
      day = localDate.with(TemporalAdjusters.lastDayOfMonth());
      System.out.println("Last day of month = "+day);
      day = localDate.with(TemporalAdjusters.firstDayOfNextMonth());
      System.out.println("First day of next month = "+day);
   }
}

Output

Current Date = 2019-06-15
Current Month = JUNE
First day of month = 2019-06-01
Last day of month = 2019-06-30
First day of next month = 2019-07-01