从时间跨度获得作为int的日子？

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateDifference {
    public static void main(String[] args) {
        String startDateStr = "2022-01-01";
        String endDateStr = "2022-01-10";

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date startDate = sdf.parse(startDateStr);
            Date endDate = sdf.parse(endDateStr);

            long timeDifference = endDate.getTime() - startDate.getTime();
            int days = (int) (timeDifference / (1000 * 60 * 60 * 24));

            System.out.println("时间跨度为：" + days + "天");
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}