题意:
输入数据格式为YYYY/MM/DD,对于每组输入数据,输出一行,表示该日期是该年的第几天。
思路:
使用Calendar.DAY_OF_YEAR
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner; public class Main { public static void main(String[] args) throws ParseException {
Scanner scanner=new Scanner(System.in);
while(scanner.hasNext())
{
String bir=scanner.next();
SimpleDateFormat format=new SimpleDateFormat("yyyy/MM/dd");
Date date=format.parse(bir);
Calendar calendar=Calendar.getInstance();
calendar.setTime(date);
long res=calendar.get(Calendar.DAY_OF_YEAR);
System.out.println(res);
}
} }