编辑器
import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap<String, String> capitalCities = new HashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("Germany", "Berlin"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); capitalCities.forEach( (k, v) -> { System.out.println(k + " -> " + v); } ); } }
USA -> Washington DC
Norway -> Oslo
England -> London
Germany -> Berlin
编辑器