“Comment ajouter un hashset singleton en Java” Réponses codées

Comment ajouter un hashset singleton en Java

// With Class Type
Set<String> set = new HashSet<>(Arrays.asList("a", "b", "c"));
//Anonymous Class
Set<String> set = new HashSet<String>(){{
    add("a");
    add("b");
    add("c");
}};