如何验证Android中小于开始日期的结束日期？

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

int result = endDate.compareTo(startDate);

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

public class DateValidation {
    public static void main(String[] args) {
        String startDateStr = "2022-01-01";
        String endDateStr = "2021-12-31";

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

            int result = endDate.compareTo(startDate);

            if (result < 0) {
                System.out.println("结束日期小于开始日期，验证失败");
            } else if (result == 0) {
                System.out.println("结束日期等于开始日期，验证成功");
            } else {
                System.out.println("结束日期大于开始日期，验证成功");
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}