// Date and time
// Are dates equal? True or false
// Adding and subtracting days and hours to a date

import java.time.*;

public class WorkingWithDatesAndTime {

public static void main (String[]args) {

   // Declare outside the try ...catch
   int year = 2012;
   int month = 4;
   int day = 17;
   int hours = 8;
   int mins = 43;
   int secs = 50;
   LocalDateTime ldt1 = null, ldt2 = null, ldt3 = null;

   // ldt1 is the same as ldt3
   try {
      ldt1 = LocalDateTime.of(year, month, day, hours, mins, secs);
      ldt2 = LocalDateTime.of(2019, 6, 3, 7, 12, 23);
      ldt3 = LocalDateTime.of(2012, 4, 17, 8, 43,50);
   }
   
   catch (DateTimeException ex) {
      System.out.println("Error with date and time");
   } // end catch
   
      System.out.println("The three dates are");
      System.out.println("====================");
      System.out.print(ldt1 + "\t");
      System.out.print(ldt2 + "\t");
      System.out.println(ldt3);
      System.out.println();
      
      // Methods: isEqual, isBefore, isAfter
      System.out.println("Are any of the dates equal?");
      System.out.println("====================");
      System.out.print(ldt1.isEqual(ldt2) + "\t");
      System.out.print(ldt1.isEqual(ldt3) + "\t");
      System.out.println(ldt2.isEqual(ldt3));
      System.out.println();
      
      // Adding and subtracting days and or years
      System.out.println("Adding 50 days, subtracting 50 days");
      System.out.println("Adding years and adding minutes");
      System.out.println("===================================");
      System.out.println("Plus days:   " + ldt1.plusDays(50));
      System.out.println("Subtract days:   " + ldt1.plusDays(-50));
      System.out.println("Plus years:   " + ldt1.plusYears(50));
      System.out.println("Plus minutes:   " + ldt1.plusMinutes(50));
      
} // end main


}
==========================================================================

OUTPUT

 ----jGRASP exec: java WorkingWithDatesAndTime
The three dates are
====================
2012-04-17T08:43:50	2019-06-03T07:12:23	2012-04-17T08:43:50

Are any of the dates equal?
==========================
false	true	false

Adding 50 days, subtracting 50 days
Adding years and adding minutes
===================================
Plus days:   2012-06-06T08:43:50
Subtract days:   2012-02-27T08:43:50
Plus years:   2062-04-17T08:43:50
Plus minutes:   2012-04-17T09:33:50

 ----jGRASP: operation complete.