package snippets.collecectionApis; import java.util.HashMap; public class Maps { public static void main(String[] args) { // {key:value, key2:value2 ...} // France: Paris // Italy: Rome // Norway: Oslo // US: Washington DC HashMap<String, String> countryCapitals = new HashMap<>(); countryCapitals.put("France","Paris"); countryCapitals.put("Italy", "Rome"); countryCapitals.put("Norway", "Oslo"); countryCapitals.put("US", "Washington DC"); countryCapitals.remove("Italy"); HashMap<Integer, String> capitals = new HashMap<>(); capitals.put(1,"Paris"); capitals.put(2, "Rome"); capitals.put(3, "Oslo"); capitals.put(4, "Washington DC"); System.out.println(capitals.get(3)); } }