如何在 Java 中创建日历对象
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How to create a calendar object in Java
提问by flyingfromchina
I need to turn a Date object into a calendar in Java, and try to access its field value for HOUR_OF_DAY. Does anybody know how to do it?
我需要在 Java 中将 Date 对象转换为日历，并尝试访问其 HOUR_OF_DAY 的字段值。有人知道怎么做吗？
采纳答案by Jo?o Silva
回答by Jim Garrison
Calendar c = new GregorianCalendar();
c.setTime(date);
回答by Tamas Mezei
Something like this should work:
这样的事情应该工作：
Calendar cal = Calendar.getInstance();
cal.setTime(date);
System.out.println(cal.get(Calendar.HOUR_OF_DAY));
回答by Brian Agnew
Can I suggest using the Joda libraryif you're doing anything more than the most basic date/time work ?
如果您所做的不仅仅是最基本的日期/时间工作，我可以建议使用Joda 库吗？
DateTime dt = new DateTime();
int hour = dt.getHourOfDay();
I realise it's not quite what you're after, but the Joda date/time library offers the benefits of a muchnicer and intuitive API, and avoids the non-intuitive gotchas of non-thread-safe date/time formatters It's well worth checking out.
我意识到这不是很你以后，但乔达日期/时间库提供一个好处多漂亮和直观的API，并且避免了非线程安全的日期/时间格式化的非直观的陷阱这是很值得的检查出去。
