Java Master's

  The  transient   keyword in Java is used to mark fields in a class that should not be serialized. Serialization is the process of converting an object into a byte stream, so it can be saved to a file, sent over a network, etc. When an object is serialized, all of its fields are usually saved. However, fields marked with   transient  are ignored during this process. Why Use the transient Keyword? There are several reasons why you might want to exclude certain fields from being serialized: Temporary or Computed Values : Some fields are temporary or calculated on the fly. These fields don’t need to be persisted or restored when deserializing the object. Sensitive Information : Fields like passwords, API keys, or security tokens contain sensitive data that should not be saved or shared. Non-Serializable Fields : Some objects, such as file streams, database connections, or thread objects, cannot be serialized. By marking these fields as  transient , you avoid ...

  When writing Java applications, there are times when you want to run multiple tasks in parallel, such as downloading files, processing data, or making API calls. Instead of creating new threads manually for each task, Java provides a simpler and more efficient way through  Executors   and   ExecutorService . Photo by  Mohammad Rahmani  on  Unsplash 1. What is an Executor? The  Executor  interface is a simple way to run tasks in the background. Instead of dealing with thread creation, you pass the task (in the form of a  Runnable  object) to the  Executor , and it handles the execution. Let’s start with a very basic example to understand this: import java.util.concurrent.Executor; import java.util.concurrent.Executors; public class SimpleExecutorExample { public static void main (String[] args) { // Create an Executor using the Executors factory method Executor executor = Executors.newSi...

  Java’s   try-with-resources   is a feature introduced in   Java 7   that simplifies the way we handle resources (like files, database connections, etc.) while ensuring they are closed properly, even if an exception occurs. It’s a powerful tool, but many developers struggle with explaining or using it correctly in interviews. This article will break it down into easy-to-understand concepts and examples. What is  try-with-resources ? In Java, resources like file streams, database connections, or sockets need to be manually closed after use to avoid memory leaks. Before  Java 7 , we had to write code to close these resources in the  finally  block of a  try-catch  structure. The  try-with-resources  feature simplifies this by automatically closing resources for you. This happens as long as the resource implements the  AutoCloseable  interface, which means any object that can be closed (like file streams or databas...