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import java.util.*;
class Test {
public static <R, E, RC extends Collection<R>, C extends Collection<E>> RC collectionGenericTest(C collection, Lambda<R, E> lambda) {
return (RC) new Vector<R>();
}
public static <R, E, RC extends List<R>, C extends List<E>> RC listGenericTest(C list, Lambda<R, E> lambda) {
return (RC) new Vector<R>();
}
public static void testGeneric() {
Collection<String> testCollection = collectionGenericTest(new Vector<Integer>(), new Lambda<String, Integer>() {
@Override
public String lambda(Integer l) {
return null;
}
});
List<String> testList = listGenericTest(new Vector<Integer>(), new Lambda<String, Integer>() {
@Override
public String lambda(Integer l) {
return null;
}
});
}
private interface Lambda<R, A> {
public R lambda(A l);
}
<error descr="Class 'Vector' must either be declared abstract or implement abstract method 'get(int)' in 'AbstractList'">private static class Vector<A> extends AbstractList<A> implements List<A></error> {
public Vector() {
}
}
}
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