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.
思路一：直接上 api
public int daysBetweenDates(String date1, String date2) {
LocalDate begin = LocalDate.parse(date1);
LocalDate end = LocalDate.parse(date2);
return Math.abs((int) (begin.toEpochDay() - end.toEpochDay()));
}