To illustrate how generics are used in the Java Collections Framework, let’s look at some examples. List and ArrayList with generics. In the above example, we already briefly explored a simpler ...

Collection classes that implement Iterable (for example, all list and set classes) now have a forEach() method. This method takes a single parameter that is a functional interface.

The examples are unit tests and require Java 8 to run. [Click on the image to enlarge it] ... There are many specializations of Multimap in GS Collections (List, Set, Bag, SortedBag, ...

Donald Raab, creator of GS Collections, open sourced by Goldman Sachs in 2012, reveals the power of that framework, and how together with Lambda expressions, it sprinkles Java with some of the ...