日期差问题

import java.util.Calendar;
import java.util.Date;

public class L5_1 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Date date1=new Date(2012,5,22);
		Date date2=new Date(2012,12,1);
		System.out.println("相差 "+f1(date1,date2)+"天");
	}

	public static long f1(Date date1,Date date2) {
		long time =date2.getTime()-date1.getTime();
//		System.out.println(time);
		time=time/(24*60*60*1000);
		return time;
	}

}

相差 193天