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Calculate Difference between 2 LocalDates

suggest change

Use LocalDate and ChronoUnit: 

LocalDate d1 = LocalDate.of(2017, 5, 1);
LocalDate d2 = LocalDate.of(2017, 5, 18);

now, since the method between of the ChronoUnit enumerator takes 2 Temporals as parameters so you can pass without a problem the LocalDate instances 

long days = ChronoUnit.DAYS.between(d1, d2);
System.out.println( days );
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Dates and Time using java.time:
* Dates and Time java.time.
* Calculate Difference between 2 LocalDates
* Operations on dates and times
* Instant
* Simple Date Manipulations
* Usage of various classes of Date Time API
* Date Time Formatting
* Date and time
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