MyClass.java
 

import java.util.HashMap;

public class MyClass {
  public static void main(String[] args) {
    HashMap capitalCities = new HashMap();
    capitalCities.put("England", "London");
    capitalCities.put("Germany", "Berlin");
    capitalCities.put("Norway", "Oslo");
    capitalCities.put("USA", "Washington DC");
    
    for (String i : capitalCities.keySet()) {
      System.out.println("key: " + i + " value: " + capitalCities.get(i));
    }
  }
}


Result:
key: USA value: Washington DC
key: Norway value: Oslo
key: England value: London
key: Germany value: Berlin