Have you used components from the standard JDK library in your projects?

Yes, in my Java projects I actively used components of the standard JDK library. For example:

• Collections from the java.util package (ArrayList, HashMap, HashSet) for storing and processing data.
• Classes for working with input/output streams (InputStream, OutputStream, Reader, Writer).
• Multithreading mechanisms from java.util.concurrent, such as ExecutorService, Future, CountDownLatch.
• Classes for working with date and time from java.time (LocalDate, LocalDateTime).
• Exceptions and their handling for error management.

Example of using collections and streams:

List<String> names = new ArrayList<>();
names.add("Alice");
names.add("Bob");

for (String name : names) {
    System.out.println(name);
}

Using the standard library allows writing more reliable and efficient code without the need to include third-party dependencies.