Custom Exception: User-Defined Exception

In this problem, you will create a program that defines a custom exception class InvalidAgeException extending Exception, and throws it when the age value is negative.

Learning Objective: Learn to create and use custom exception classes

Overview

By extending Exception class, you can create application-specific exceptions. This makes error handling clearer.

Specifications

InvalidAgeException class (InvalidAgeException.java)

• Extends Exception
• Constructor: InvalidAgeException(String message)
  • Pass message to parent class via super(message)

Main class (Main.java)

• static void validateAge(int age) throws InvalidAgeException
  • If age is less than 0, throw InvalidAgeException
  • Message: "Age cannot be negative"
  • If valid: complete normally without throwing
• Include a main method (for compilation)

Test Method

Each test case calls Main.validateAge(int) directly and verifies:

• Valid ages (e.g., 0, 25, 100) do not throw an exception
• Invalid ages (e.g., -1, -5) throw InvalidAgeException with message "Age cannot be negative"