Map<String,String> linkedhashmap = new LinkedHashMap();

linkedhashmap.put("United States", "Washington");

linkedhashmap.put("Canada", "Ottawa");

linkedhashmap.put("Canada", "Ottawa");

linkedhashmap.put("South Africa", "Pretoria");

linkedhashmap.put("South Africa", "Cape Town");

linkedhashmap.put("South Africa", "Bloemfontein");



System.out.println(linkedhashmap); // Duplicates not allowed as it's a Map, Insertion Order as its linked Map