Let's say I have arraylist of Hashmap, and Hashmap contain some keys and values
Arraylist d = [{key1=1,key2=2},{key1=1,key3=3}]
I want to remove hashmap that does not contain certain key. for example, I want to remove hashmap that does not have key2.
result should be:
d= [{key=1,key2=2}]
How do I approach this?
If source is
List<Map<String, Integer>> list;
You can filter it that way:
List<Map<String, Integer>> newList =
list.stream().filter(m -> m.containsKey("key2")).collect(Collectors.toList());
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