There isn’t a class that extends List for which you can set a limit on its size and that it behaves like a Queue object if you add an item beyond its fixed size. Leggi tutto “A List with a fixed size”
In the previous post about the Comparable interface I explained how you can extend a class of objects that implement the Comparable interface and then order them in a list according to the logic defined in the overridden method compareTo.
If you want to be able to sort the list according to a number of different criteria you must use the Comparator interface, for example, in the case of a list of countries, it is possible that you want to order them not only alphabetically but also in order of area or population. Leggi tutto “The Comparator interface”