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import java.util.LinkedHashMap; public class Main { public static void main(String[] args) { LinkedHashMap<String, String> capitalCities = new LinkedHashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("India", "New Dehli"); capitalCities.put("Austria", "Wien"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); for (String i : capitalCities.keySet()) { System.out.println(i); } } }
England
India
Austria
Norway
USA
编辑器