计算某年、某月、某日和某年、某月、某日之间的间隔天数,要求年月日通过main方法的参数传递到程序中
public static void main(String[] args) throws ParseException {
Scanner scanner=new Scanner(System.in);
System.out.println("请输入第一个时间(格式1970-01-01)");
String date1=scanner.next();
System.out.println("请输入第二个时间(格式1970-01-01)");
String date2=scanner.next();
calDays(date1, date2);
}
static void calDays(String date1,String date2) throws ParseException {
SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yy-MM-dd");
Date date = simpleDateFormat.parse(date1);
Date date3 = simpleDateFormat.parse(date2);
Calendar calendar1=Calendar.getInstance();
calendar1.setTime(date);
Calendar calendar2=Calendar.getInstance();
calendar2.setTime(date3);
long timeInMillis1 = calendar1.getTimeInMillis();
long timeInMillis2 = calendar2.getTimeInMillis();
long abs = Math.abs(timeInMillis1 - timeInMillis2);
long l = abs / (1000 * 60 * 60*24);
System.out.println("相差:"+l+"天");
}