java 按降序或升序排列日期的 ArrayList
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Order ArrayList of dates in decending or ascending order
提问by Munazza
I have an array list of Dates and I want to order it by dates in ascending and descending order. Could anyone please provide a complete code snippet for this ? I have seen many questions like this but could not find a suitable answer.
我有一个日期数组列表，我想按日期按升序和降序对其进行排序。任何人都可以为此提供完整的代码片段吗？我见过很多这样的问题，但找不到合适的答案。
List will be like this
列表将是这样的
List<Date> dates= new ArrayList<Date>();
Any kind of help will be appreciated , Many thanks,
任何形式的帮助将不胜感激，非常感谢，
回答by assylias
Since Datealready implements Comparable, you can simply use:
由于Date已经实现了 Comparable，您可以简单地使用：
Collections.sort(dates);
to sort in ascending order, and for descending order:
按升序和降序排序：
Collections.sort(dates, Collections.reverseOrder());
