为什么year1和year2都是1？那应该怎样取cal1.YEAR和cal2.YEAR的值？

Question

package lesson02;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Scanner;
import java.util.Calendar;
import java.util.Date;
public class IdCardCheck {

    /**
     * @param args
     * @throws ParseException 
     */
    public static void main(String[] args) throws ParseException {
        // TODO Auto-generated method stub
        Scanner sc=new Scanner(System.in);
        String ID=sc.next();
        String reg="/^[1-9]\\d{5}(18|19|20|(3\\d))\\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\\d{3}[0-9Xx]$/;";
        while(ID.matches(reg))
        {
            ID=sc.next();
        }
        /*if(ID.matches(reg))
        {
            System.out.println("YES");
        }*/
        //System.out.println(str2);
        String bd=ID.substring(6, 14);
        SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMdd");
        Date date=sdf.parse(bd);
        SimpleDateFormat sdf2=new SimpleDateFormat("yyyy-MM-dd");
        //System.out.println(sdf.format(date));
        System.out.println("BD is "+sdf2.format(date));
        Calendar cal1=Calendar.getInstance();
        cal1.setTime(date);
        Calendar cal2=Calendar.getInstance();
        Date cur=cal2.getTime();
        //System.out.println(sdf.format(cal2.getTime()));
       // System.out.println("age is "+(cal2.YEAR-cal1.YEAR));
        System.out.println("the current year is "+cal2.get(cal2.YEAR));
        int year1=cal1.YEAR;
        int year2=cal2.YEAR;
        System.out.println(year1);
    }

}

Answer 1

你那样获取的是YEAR这个枚举值，不是年份

    int year1=cal1.get(cal1.YEAR);
    int year2=cal2.get(cal2.YEAR);