CODEWITHSUNDEEP
java
creative Pro
creative Pro

Reputation: 57

get case insensitive key from list<map<String,String>>

I have a list> and now I want to search the key without considering case. i.e. map.get(0).get("test") or map.get(0).get("TEST"). both result should give the value for key 'TESt'.

I am filling the List> list from other list> like below. There is no way to change the original map. Can anyone tell me how to add key with upper case?

mappedListHashed is List> accessLvlArray is List>

for (HashMap<String, String> map : mappedListHashed) {
                accessLvlArray.add(map);
            }

Upvotes: 2

Views: 578

Answers (2)

Rahul Tripathi
Rahul Tripathi

Reputation: 172418

You can try to override the put method:

public class myMap extends HashMap<String, String> {
@Override
public String put(String key, String value) {
   return super.put(key.toLowerCase(), value);
}

public String get(String key) {
   return super.get(key.toLowerCase());
}
}

Upvotes: 1

Eran
Eran

Reputation: 393791

You could always put just lower case keys in your Map 

list.get(0).put("tEst".toLowerCase(),"value");

and call 

list.get(0).get("Test".toLowerCase())

in order to always search for the lower case version of the key.

If that's not an option, you can wrap your String key with a custom class that overrides equals and hashCode in a manner that ignores case.

Upvotes: 3

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