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0284885 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | package Case_package;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.Date;
public class case_demo4 {
public static void main(String[] args) throws ParseException {
//请使用代码实现计算你活了多少天，用JDK7和JDK8两种方式完成
//JDK7
//规则：只要对时间进行计算或者判断，都需要先获取当前时间的毫秒值
//1、计算出生年月日的毫秒值
String birthday = "2002年3月7日";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
Date date = sdf.parse(birthday);
long birthdayTime = date.getTime();
//2、获取当前时间的毫秒值
long todayTime = System.currentTimeMillis();
//3、计算间隔了多少天
long time = todayTime - birthdayTime;
System.out.println(time / 1000 / 60 / 60 / 24);
//JDK8
LocalDate ld1 = LocalDate.of(2002, 3, 7);
LocalDate ld2 = LocalDate.now();
long days = ChronoUnit.DAYS.between(ld1, ld2);
System.out.println(days);
}
}
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