private void menuWithSelectionOfSet(String key)
	{
		switch (key.toLowerCase()) 
		{
		case "hashset":
			System.out.println("You're here at the hashset");
			Set<String> hashset = new HashSet<String>();
			addStringValuesInto(hashset);
			displayStringContent(hashset);
			break;
		case "treeset":
			System.out.println("You're here at the treeset");
			Set<Integer> treeset = new TreeSet<Integer>();
			addIntegerValuesInto(treeset);
			displayContent(treeset);
			break;
		case "linkedhashset":
			System.out.println("You're here at the linkedhashset");
			Set<Integer> linkedHashset = new LinkedHashSet<Integer>();
			addIntegerValuesInto(linkedHashset);
			displayContent(linkedHashset);
			break;
		case "all":
			this.menuWithSelectionOfSet("hashset");
			this.menuWithSelectionOfSet("treeset");
			this.menuWithSelectionOfSet("linkedhashset");
			break;
		default:
			System.exit(0);
			break;
		}
	}