Introduction to Programming

Class java.util.Arrays

We have used the class java.util.Arrays already several times. It is the primary tool for array management. But, it used to be very popular with those who use collections too because the method asList(T...a) was the most compact way of creating and initializing a collection:

List<String> list = Arrays.asList("s0", "s1");Set<String> set = new HashSet<>(Arrays.asList("s0", "s1");

But after a factory method, of(), was introduced in each of the collections, the popularity of the Arrays class dropped substantially. The following is a more natural way to create a collection:

List<String> list = List.of("s0", "s1");Set<String> set = Set.of("s0", "s1");

This collection's objects are immutable. But if a mutable one is needed, ...