5169. Number of Days Between Two Dates

Write a program to count the number of days between two dates.

The two dates are given as strings, their format is YYYY-MM-DD as shown in the examples.

 

Example 1:

Input: date1 = "2019-06-29", date2 = "2019-06-30"
Output: 1

Example 2:

Input: date1 = "2020-01-15", date2 = "2019-12-31"
Output: 15

 

Constraints:

• The given dates are valid dates between the years 1971 and 2100.

import java.time.LocalDate;
import java.time.Month;
import java.time.temporal.ChronoUnit;
class Solution {
    public int daysBetweenDates(String date1, String date2) {
    LocalDate dateBefore = LocalDate.parse(date1);
    LocalDate dateAfter = LocalDate.parse(date2);
        
    //calculating number of days in between
    long res = ChronoUnit.DAYS.between(dateBefore, dateAfter);
        
    //displaying the number of days
    return Math.abs((int) res);
    }
}

 

来源：https://www.cnblogs.com/wentiliangkaihua/p/12348738.html