private int doStuffTernaryGood(final Collection<Object> objects) {
    return ((null != objects) && !objects.isEmpty())
            ? objects.iterator().next().hashCode()
            : 0;
}

the above works as expected.

If on the other hand the condition is the complement as in the folowing code

private int doStuffTernaryBad(final Collection<Object> objects) {
    return ((null == objects) || objects.isEmpty())
            ? 0
            : objects.iterator().next().hashCode();
}

objects.iterator() is marked with a hint of "Dereferencing null pointer".