Array contains() without case sensitive lookup? [duplicate]

Question

Can I somehow tell the array.contains() method to not make the lookup case sensitive?

List<String> data = Arrays.asList(   "one", Two", "tHRee"); //lots of entries (100+)  data.contains("three"); 

Answer 1

contains just check if an object is present in the List. So you can't do a case insensitive lookup here, because "three" is a different object than "Three".

A simple approach to solve this would be

public boolean containsCaseInsensitive(String s, List<String> l){      for (String string : l){         if (string.equalsIgnoreCase(s)){             return true;          }      }     return false;   } 

and then

containsCaseInsensitive("three", data); 

Java 8+ version:

public boolean containsCaseInsensitive(String s, List<String> l){         return l.stream().anyMatch(x -> x.equalsIgnoreCase(s));     }