Map<String, List<String>> myMap1 = new HashMap<String, List<String>>();
List<String> citiesInUSA = new ArrayList<>();
citiesInUSA.add("New York");
citiesInUSA.add("Los Angeles");
List<String> citiesInUK = new ArrayList<>();
citiesInUK.add("London");
citiesInUK.add("Manchester");
myMap1.put("USA", citiesInUSA);
myMap1.put("UK", citiesInUK);
System.out.println(myMap1);
Map<String, List<String>> myMap1 = new HashMap<String, List<String>>();
List<String> citiesInUSA = new ArrayList<>();
citiesInUSA.add("New York");
citiesInUSA.add("Los Angeles");
List<String> citiesInUK = new ArrayList<>();
citiesInUK.add("London");
citiesInUK.add("Manchester");
myMap1.put("USA", citiesInUSA);
myMap1.put("UK", citiesInUK);
System.out.println(myMap1);