Exception Handling: Division by Zero Validation

In this problem, you will implement a static divide(int a, int b) method that throws IllegalArgumentException when the divisor is zero.

Learning Objective: Understand how to validate method arguments and explicitly throw exceptions for invalid values

Overview

Create a method that performs integer division. When the divisor is 0, explicitly throw an IllegalArgumentException to notify the caller of the error. It is important to validate input yourself and throw an appropriate exception rather than relying on the Java runtime.

Specifications

Main Class

• Method: static int divide(int a, int b)
  • If b is 0: throw IllegalArgumentException
    • Message: "Divisor must not be zero"
  • If b is not 0: return the result of a / b

Test Cases

1. Valid: divide(10, 2) → 5 (no exception)
2. Valid: divide(0, 5) → 0 (no exception)
3. Invalid: divide(10, 0) → IllegalArgumentException
4. Invalid: divide(-15, 0) → IllegalArgumentException