1️⃣ Find Second Highest Number in a List javaCopyEditList<Integer> numbers = Arrays.asList(5, 1, 9, 2, 9, 7); Optional<Integer> secondHighest = numbers.stream() .distinct() .sorted(Comparator.reverseOrder()) .skip(1) .findFirst(); Sy...
Designing a clean and consistent API response structure is crucial to providing a good developer experience and ensuring maintainability. Whether you're working on a small project or a large-scale application, structuring your API responses properly ...
Managing configurations dynamically is a crucial requirement in modern applications. In this article, we'll explore how to dynamically load Spring properties from external repositories by extending the EnvironmentPostProcessor and EnumerablePropertyS...
Introduction In Java interviews, questions about the Map interface and its implementations like HashMap, ConcurrentHashMap, SynchronizedMap, and TreeMap often test both theoretical knowledge and practical problem-solving skills. This guide provides a...
Let’s be honest—data processing often feels like a tedious chore, especially when you're stuck with endless loops and if-else statements. But then along came Java Streams, the superhero we never knew we needed, making us wonder, “Why wasn’t I doing t...
1. Introduction to Java Streams The Stream API, introduced in Java 8, is a powerful abstraction for processing collections of data in a functional-style. It enables operations on a sequence of elements (like filtering, mapping, and reducing) and supp...
Introduction Java introduced Optional<T> in Java 8 to handle the common issue of NullPointerException and make code more readable and expressive. Optional provides a container object which may or may not contain a non-null value, helping developers t...
1. What is a virtual thread in Java? Answer: A virtual thread is a lightweight, user-managed thread introduced in Java as part of Project Loom. Unlike platform threads, virtual threads are not directly tied to an operating system (OS) thread and are...
CompletableFuture, part of Java’s java.util.concurrent package, is an incredibly powerful class for managing asynchronous tasks and handling complex workflows. It allows you to create, combine, and handle async operations without blocking threads, ma...
With the introduction of Virtual Threads in Java (via Project Loom), asynchronous programming is now simpler and more efficient than ever. CompletableFuture was already a powerful tool for managing asynchronous tasks, but combining it with virtual th...
