计算两个日期相差几个月

package test;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Timer;

public class TimerTest {
public static void main(String[] args){
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");
        long monthday;
        try {
            Date startDate1 = f.parse("2010-11-01");
            //开始时间与今天相比较
            Date endDate1 = f.parse("2011-12-01");

            Calendar starCal = Calendar.getInstance();
            starCal.setTime(startDate1);

            int sYear = starCal.get(Calendar.YEAR);
            int sMonth = starCal.get(Calendar.MONTH);
            int sDay = starCal.get(Calendar.DATE);

            Calendar endCal = Calendar.getInstance();
            endCal.setTime(endDate1);
            int eYear = endCal.get(Calendar.YEAR);
            int eMonth = endCal.get(Calendar.MONTH);
            int eDay = endCal.get(Calendar.DATE);

            monthday = ((eYear - sYear) * 12 + (eMonth - sMonth));

            if (sDay < eDay) {//此如果各位用的话，请把12月的那个月测一下，我原来记得这个if是有问题的，后来怎么都测不出来，现在用时加不加似乎都没问题，最好加上
                monthday = monthday + 1;
            }
            monthday=Math.abs(monthday);//如果月分为负数，则转为正数
            System.out.println("----------->>>>>>>>monthCount=" + monthday);
        } catch (Exception e) {
            monthday = 0;
        }
}
}