What is your experience with data collections in programming?

In programming, I actively use collections for storing and processing data. In Java, for example, I often use interfaces and classes such as List, Set, Map, and their implementations (ArrayList, HashSet, HashMap). This allows for efficient data organization, search, sorting, and filtering operations.

Example of using ArrayList:

List<String> names = new ArrayList<>();
names.add("Ivan");
names.add("Maria");
for (String name : names) {
    System.out.println(name);
}

I am also familiar with Streams for convenient collection processing in a functional style.