Is there a good way to have a Map<String, ?> get and put ignoring case? [duplicate]

Answer 1

Check the accepted answer at the link below. How to check for key in a Map irrespective of the case?

Bottom line is "The simplest solution is to simply convert all inputs to uppercase (or lowercase) before inserting/checking. You could even write your own Map wrapper that would do this to ensure consistency."

Answer 2

Would it be possible to implement your own Map overriding put/get methods ?

public class CaseInsensitiveMap extends HashMap<String, String> {
    ...
    put(String key, String value) {
       super.put(key.toLowerCase(), value);
    }

    get(String key) {
       super.get(key.toLowercase());
    }
}

This approach does not force you to change your "key" type but your Map implementation.