class CollectionThatThrowsClassCastException<T> extends ArrayList<T> {
      @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 1L;

      @Override
      public boolean contains(@Nullable Object element) {
        throw new ClassCastException("");
      }
    }
    Collection<Integer> nums = new CollectionThatThrowsClassCastException<>();
    nums.add(3);

    class CollectionThatThrowsClassCastException<T> extends ArrayList<T> {
      @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 1L;

      @Override
      public boolean contains(@Nullable Object element) {
        throw new ClassCastException("");
      }
    }
    Collection<Integer> nums = new CollectionThatThrowsClassCastException<>();
    nums.add(3);