Query about data structure

[chkontog]

Hello,

i have a HashMap<String, String> but when i put elements in hashmap it deletes duplicate keys.
So, I would like to ask, which data structure to use, to combine keys and elements, without delete duplicate keys?

Thanks

[quad64bit]

So, the expected behavior you desire is to have 1 key return multiple objects? You can still do this with a map, but you will need to store a collection for the value instead of a string, and you will need to check and see if it exists before you insert.