Robert Konigsberg, Jerome Mourits and myself have written several snippets that highlight the carefully designed Google Collections Library: PreconditionsPreconditions.checkNotNull(order.getAddress(), "order address"); Iterables.getOnlyElementassertEquals(jesse, Iterables.getOnlyElement(usersOnDuty)); Comparators.maxreturn Comparators.max(perKm, minimumDeliveryCharge); Objects.equal and hashCodere
