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[英]Converting a year and day (e.g. 2013216 = the 216th day of 2013) into a full date in Java
[英]Using the Java CLASS Day to find number of days since specific date e.g. birthday?
Day班了解日历的复杂性,例如1月有31天,而2月有28天,有时甚至是29天。
我正在尝试将这种公共课程实施到我的程序中,但是却无法执行,我正在制作一个程序来计算一个人还活着多少天
这是教科书中给出的代码:
public class DaysAlivePrinter
public static void main(String[] args){
Day jamesGoslingsBirthday = new Day(1955, 5, 19);
Day today = new Day();
System.out.print("Today: ");
System.out.println(today.toString());
int daysAlive = today.daysFrom(jamesGoslingsBirthday);
System.out.print("Days alive: ");
System.out.println(daysAlive);
}
}
我最了解JavaDoc- http ://www.jfree.org/jfreechart/api/javadoc/org/jfree/data/time/Day.html-但是没有地方说如何将Day类的功能导入到您的程序。 这样做的过程是什么?
为什么不简单使用Java time api(Java 8):
LocalDate jamesGoslingsBirthday = LocalDate.of(1955, 5, 19);
LocalDate today = LocalDate.now();
System.out.println("Today: " + today);
int daysAlive = ChronoUnit.DAYS.between(jamesGoslingsBirthday, today);
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