Method reference for an arbitrary object

ArbitraryObjectMethodReference.java

interface Accessor<BEAN, PROPERTY> {
        PROPERTY access(BEAN bean);
}

public static void main(String[] args) {
        Address address = new Address("29 Acacia Road", "Tunbridge Wells");
        Accessor<Address, String> accessor = Address::getCity;
        System.out.println(accessor.access(address));
}