public class Base  {
    
    private Penguin penguin;
    private Sparrow sparrow;
  
    Base(String n, String s, String b, String m){
        
        this.penguin = new Boats(n, s);
        this.sparrow = new Cars(b, m);
}
.........
}

Set set = bases.entrySet();
        Iterator i = set.iterator();
        while (i.hasNext()) {
            Map.Entry me = (Map.Entry) i.next();
            System.out.println(me.getKey() + " : " + me.getValue());
        }

this.penguin = new Penguin(n, s);
this.sparrow = new Sparrow(b, m);