package testcases;

import java.util.ArrayList;
import java.util.List;

public class TestUpCast {

    public static <B, E extends B> List<B> moreGeneric(List<E> list) {
        List<B> result = new ArrayList<B>();
        result.addAll( list );
        return result;
    }

    class A {}
    class B extends A {}

    public static void main( String[] args ) {
        List<B> b = new ArrayList<B>();
        List<A> a = moreGeneric(b);
    }
}