Remove duplicate values from HashMap in Java

Question

I have a map with duplicate values:

(\"A\", \"1\");
(\"B\", \"2\");
(\"C\", \"2\");
(\"D\", \"3\");
(\"E\", \"3\");

I would like to the map

Answer 1

public static void main(String[] args) {
    Map map = new HashMap<>();
    map.put("A", "1");
    map.put("B", "2");
    map.put("C", "2");
    map.put("D", "3");
    map.put("E", "3");
    System.out.println("Initial Map : " + map);
    for (String s : new ConcurrentHashMap<>(map).keySet()) {
        String value = map.get(s);
        for (Map.Entry ss : new ConcurrentHashMap<>(map)
                .entrySet()) {
            if (s != ss.getKey() && value == ss.getValue()) {
                map.remove(ss.getKey());
            }
        }
    }
    System.out.println("Final Map : " + map);
}