Case insensitive string as HashMap key

CaseInsensitiveExample.java

/**
 * @author Yuhtin
 * Github: https://github.com/Yuhtin
 */
public class CaseInsensitiveExample {

    static final CaseInsensitiveLinkedMap<Character> CHARACTER_MAP = CaseInsensitiveLinkedMap.newMap();

    public static void main(String[] args) {

        // populate map
        CHARACTER_MAP.put("LetterA", 'a');

        // get value from map
        Character character = CHARACTER_MAP.get("lEttErA");
        
        System.out.println(character.toString()); // Prints: a

    }

}

CaseInsensitiveLinkedMap.java

import java.util.LinkedHashMap;

/**
 * @author Yuhtin
 * Github: https://github.com/Yuhtin
 */
public class CaseInsensitiveLinkedMap<V> extends LinkedHashMap<String, V> {

    public static <V> CaseInsensitiveLinkedMap<V> newMap() {
        return new CaseInsensitiveLinkedMap<>();
    }

    @Override
    public V get(Object key) {
        String keyFounded = this.keySet()
                .stream()
                .filter(keyMap -> keyMap.equalsIgnoreCase((String) key))
                .findAny()
                .orElse(null);

        return keyFounded == null ? null : super.get(keyFounded);
    }

}