import java.util.*; | |
public class Test { | |
List<A> l; | |
@Override | |
Map<String, String> foo() { | |
HashMap<String, String> m = new HashMap<String, String>(); | |
for (A b : l) { | |
Map<String, String> map = b.foo(); | |
for (Map.Entry<String, String> entry : map.entrySet()) { | |
if (!m.containsKey(entry.getKey())) { | |
m.put(entry.getKey(), entry.getValue()); | |
} | |
} | |
} | |
return m; | |
} | |
} | |
class A { | |
Map<String, String> foo(){return null;} | |
} | |
class B extends A {} |