import java.util.HashMap;

public class Test {
    public static void main(String[] args) {
        HashMap<String, Integer> map = new HashMap<>();
        map.put("Tobias", 22);
        map.put("Per", 42);
        map.put("Kevin", 12);
        map.put("Kevin", 52);
        
        for (String key : map.keySet()) {
            System.out.println(key + " " + map.get(key));
        }

        for (HashMap.Entry<String, Integer> e : map.entrySet()) {
            System.out.println(e.getKey());
            System.out.println(e.getValue());
        }
    }
}