Java Programming Basics with Examples

📌 Multiple Catch Blocks in Java (Professional & Beginner-Friendly Explanation) When a programmer uses a try block followed by multiple catch blocks, Java follows strict rules to avoid ambiguity while handling exceptions. 🔹 Key Rules of Multiple Catch Blocks 1️⃣ No Duplicate Catch Blocks Allowed Each catch block must handle a different exception type. ❌ Invalid Code (Duplicate Catch): try {     int a = 10 / 0; } catch (ArithmeticException e) {     System.out.println("Arithmetic Exception"); } catch (ArithmeticException e) { // ❌ Duplicate     System.out.println("Duplicate Exception"); } 📌 Reason:  The JVM will be confused about which catch block to execute, resulting in a compile-time error. 2️⃣ Superclass Catch Can Handle Subclass Exceptions A catch block with a superclass exception can handle all its subclass exceptions. 📌 Example: try {     int[] arr = new int[5];     arr[10] = 50; } catch (Exception e) {     Sys...

Understanding Java Exceptions: A Complete Guide In Java, exceptions are a crucial part of robust programming. They help handle unexpected events during program execution and ensure your application doesn't crash abruptly. In this guide, we'll explore exceptions, their types, hierarchy, and handling mechanisms, along with examples. What is an Exception? An exception is an event that disrupts the normal flow of a program. When an exception occurs, the program's execution is terminated abnormally unless properly handled. Key points: Exceptions occur at runtime, not at compile time. Once an exception is generated, the rest of the code after it may not execute unless handled properly. Exception Handling Mechanism Exception handling is the process of responding to exceptions during program execution. It can be done in two ways: 1. Using JVM (Default Exception Handler): The Java Virtual Machine handles the exception automatically, often printing a stack trace and terminating the p...