为什么year1和year2的值都是1？如果进行cal1.YEAR、cal2.YEAR之间的加减代码应该怎样写？

Z时代
2024-01-10
分类：技术分享

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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;
}
}