Have you used collections in your projects?

Yes, in Java projects I actively used collections from the java.util package. For example, to store and process lists of objects, I used ArrayList; for unique elements — HashSet; and for key-value pairs — HashMap. Collections allow for convenient data management, providing flexibility and performance.

Example of using ArrayList:

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