How to check for key in a Map irrespective of the case? [duplicate]

Answer 1

In an attempt to present an answer that matches your question's requirement "without bothering the case of the key"...

This answer may be tedious if you add into your map in many, many places. In my example it only happens when a user creates a new character (in my game). Here is how I handled this:

boolean caseInsensitiveMatch = false;
for (Map.Entry entry : MyServer.allCharacterMap.entrySet()) {
    if (entry.getKey().toLowerCase().equals(charNameToCreate.toLowerCase())){
        caseInsensitiveMatch = true;
        break;
    }
}

Of course this requires looping through my large ConcurrentHashMap, but works for me.