Ignore case while comparing string with keyvalue in the hashmap

Question

I am trying to check if my hashmap key set contains the string 'buffSB.toString()'. But I wanted to compare ignoring case (upper or lower).

static StringBuilder buffSB = new StringBuilder(); 

buffSB.append(alphabet);

Map<String, String> pref =  new Datamatch().main();  // Getting the Hashmap from other class

if(pref.containsKey(buffSB.toString()))             //This is where I need to ignore case while searching string in the map key set 
  { 
      String val = pref.get(buffSB.toString());
  }

Any help will be greatly appreciated!!!

Answer 1

You can also try to use TreeMap which enable providing a comparator to its constructor:

Map<String, String> yourMap= new TreeMap<String, String>(String.CASE_INSENSITIVE_ORDER);

see Case insensitive string as HashMap key