Exception Hierarchy

In this problem: You will understand the difference between checked and unchecked exceptions by creating AppException (checked) and AppRuntimeException (unchecked) custom exceptions.

Learning Objective: Understand the hierarchy and usage of checked vs unchecked exceptions

Overview

Java exceptions are divided into Exception (checked) and RuntimeException (unchecked). Checked exceptions require throws declaration and catch handling, while unchecked exceptions do not.

Specifications

• AppException extends Exception: checked exception
• AppRuntimeException extends RuntimeException: unchecked exception
• Service class:
  • checkedMethod(): throws AppException("Checked error occurred") (throws declaration required)
  • uncheckedMethod(): throws AppRuntimeException("Unchecked error occurred")
• In Main, handle both with try-catch and output exception type name and message

Output Format

Caught checked: AppException: Checked error occurred
Caught unchecked: AppRuntimeException: Unchecked error occurred