[英]How to sort guava multimap? (KEY=DATE)
I have a 我有一个
Multimap<Date,Invoice> multimap = ArrayListMultimap.create();
from guava. 来自番石榴。 I was wondering how to SORT the the Date key in the multimap.
我想知道如何在多图中排序日期键。
Currently, I'm doing this: 目前,我这样做:
Iterator<Date> dateItr = multimap.keySet().iterator();
Set<Date> treeSet = new TreeSet<Date>(Collections.reverseOrder());
and later I loop through the treeSet iterator. 然后我循环遍历treeSet迭代器。 Any idea how to avoid this circumvention?
知道如何避免这种规避吗?
Guava team member here. 番石榴团队成员在这里。
Use TreeMultimap
, or if you need to map into List
s, use MultimapBuilder
: 使用
TreeMultimap
,或者如果需要映射到List
,请使用MultimapBuilder
:
return MultimapBuilder.treeKeys().arrayListValues().build()
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