Module 33: Exception Handling in Java

⚠️ What is an Exception?

An exception is an event that disrupts the normal flow of a program's execution. It is an object that represents an error or unexpected behavior.

🔍 Types of Exceptions

• Checked Exceptions: Known to the compiler (e.g., IOException, SQLException).
• Unchecked Exceptions: Not checked at compile-time (e.g., ArithmeticException, NullPointerException).
• Error: Serious issues that cannot be handled (e.g., OutOfMemoryError).

🛠️ Exception Handling Mechanism

• try - block of code to monitor for errors
• catch - block to handle exceptions
• finally - block that always executes
• throw - used to explicitly throw an exception
• throws - declares exceptions

🧪 Example: Try-Catch Block

                    public class Main {
                      public static void main(String[] args) {
                        try {
                          int data = 10 / 0;
                        } catch (ArithmeticException e) {
                          System.out.println("Exception caught: " + e);
                        } finally {
                          System.out.println("This block always executes");
                        }
                      }
                    }