Functional Interface Basics

Learning Objective: Understand the definition and basic usage of functional interfaces

Overview

Create a functional interface Calculator with a single abstract method and implement it with a lambda expression.

Specifications

• Calculator interface: has int calculate(int a, int b) method
• Annotate with @FunctionalInterface
• In main, create an addition implementation using lambda expression
• Pass 5 and 3 as arguments and output the result

Output Format

Result: 8