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Is there a good way to have a Map<String, ?> get and put ignoring case?
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Therefore, if we provide a case-insensitive String Comparator, we'll get a case-insensitive TreeMap. which we can supply in the constructor: Map<String, Integer> treeMap = new TreeMap<>(String. CASE_INSENSITIVE_ORDER); treeMap.
I want to know whether a particular key is present in a HashMap, so i am using containsKey(key) method. But it is case sensitive ie it does not returns true if there is a key with Name and i am searching for name.
Map keys of type String are case-sensitive. Two keys that differ only by the case are considered unique and have corresponding distinct Map entries. Subsequently, the Map methods, including put , get , containsKey , and remove treat these keys as distinct.
TreeMap extends Map and supports custom comparators.
String provides a default case insensitive comparator.
So:
final Map<String, ...> map = new TreeMap<>(String.CASE_INSENSITIVE_ORDER); The comparator does not take locale into account. Read more about it in its JavaDoc.
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You could use CaseInsensitiveMap from Apache's Commons Collections.
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