Java code to convert given input values from KM to Meter, Meter to Centimetres, etc. OOP approach using the strategy design pattern Step 1: Define an interface.

FP – calculate the invoice price Invoice Price = (markedPrice * (100 – discountRate)/100) + deliveryCharge Example

Current Balance = Initial Amounts + Credits – Debits OOP approach using the builder design pattern Creating a constructor to take three BigDecimal values is NOT only readable, but also prone …

int result = input / divideBy will throw an unchecked exception if divideBy = 0. OOP error handling by throwing exceptions In OOP errors are handled by throwing & catching exceptions. …

FP error handling – checked exceptions The code below breaks the flow of execution as the input “ABC” throws a checked exception – “NumberFormatException”.

handle(…) returns a result or an exception A dummy exception is thrown from “f” to demonstrate an exceptional scenario. The “java.util.concurrent.ExecutionException” potentially thrown by f.get(), g.get(), and h.get() is a checked …