查找不同行星上的年龄
我正在编写一个程序，询问用户的出生日期，然后计算他们在不同行星上的年龄。除了每个数字之间有一个空格之外，我不打算假设如何输入生日。
我现在拥有的代码不符合这些规范，我不知道如何编写它。我在计算我今天的年龄时也遇到问题。当我输入我的生日并打印出年龄时，它当前告诉我我是 407，但是当我打印出 dateBirth 和今天时，这两个日期都是正确的。
System.out.print("Please enter your birthdate (mm dd yyyy): ");
birthdate = scan.nextLine();
DateFormat df = new SimpleDateFormat("MM dd yyyy");
Date dateBirth = df.parse(birthdate);
Calendar calBirth = new GregorianCalendar();
calBirth.setTime(dateBirth);
Calendar calDay = new GregorianCalendar();
today = calDay.getTime();
age = (today.getTime() - dateBirth.getTime()) / (1000 * 60 * 60 * 24 * 365);
I'm writing a program that asks the user for their birthdate and then calculates their age in years of different planets. I am not suppose to assume how the birthdate is to be entered except that there is one white space between each number.
The code I have right now does not meet these specifications right now and I'm not sure how to write it otherwise. I am also having problem calculating what my age would be today. When I enter my birthdate and print out age, it currently tells me that I'm 407 yet when I print out dateBirth and today, both of those dates are correct.
System.out.print("Please enter your birthdate (mm dd yyyy): ");
birthdate = scan.nextLine();
DateFormat df = new SimpleDateFormat("MM dd yyyy");
Date dateBirth = df.parse(birthdate);
Calendar calBirth = new GregorianCalendar();
calBirth.setTime(dateBirth);
Calendar calDay = new GregorianCalendar();
today = calDay.getTime();
age = (today.getTime() - dateBirth.getTime()) / (1000 * 60 * 60 * 24 * 365);
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1000 * 60 * 60 * 24 * 365 实际上是
31536000000，它比 Integer.MAX_VALUE 大，这会导致溢出。作为整数，它将被计算为1471228928，这会导致错误的结果。解决方案是将字母 L 附加到您的常量之一
1000 * 60 * 60 * 24 * 365 is actually
31536000000which is bigger than Integer.MAX_VALUE this causes an overflow. As an integer it would be evaluated to1471228928which leads to the wrong result.The solution is append the letter L to one of your constants
您应该检查表达式
1000 * 60 * 60 * 24 * 365的计算结果是否为您期望的结果，如果不是，请找到一种方法来获得期望的结果。也许你甚至应该考虑一下，在地球上，我们有所谓的闰年，你可以将你的问题标记为家庭作业。You should check if the expression
1000 * 60 * 60 * 24 * 365evaluates to the result you are expecting and if not, find a way to get the expected result. Perhaps you should even consider that on earth, we have so called leap years and that you could tag your question as homework.是一个int，但是保存它太长了。将其中之一设为很长，例如：
Is an int, but its to long to hold it. Make one of these a long, like: