Blog Archives

01: OOP vs FP with Java example – placing a trade

A Trade goes through 3 state changes – placed, filled, and settled. Let’s solve this simple problem using both OOP & …

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02: OOP vs FP with Java example – Conversion strategy pattern

Java code to convert given input values from KM to Meter, Meter to Centimetres, etc. OOP approach using the strategy design …… Read more ›...



03: Java FP composing functions example – calculate discount

FP – calculate the invoice price Invoice Price = (markedPrice * (100 – discountRate)/100) + deliveryCharge Example “f.andThen(g)” is the composition … … Read more ›...



04: Java OOP vs FP – Builder Pattern

Current Balance = Initial Amounts + Credits – Debits OOP approach using the builder design pattern Creating a constructor to take … … Read more ›...



05: Java OOP vs FP – Handling unchecked exceptions

int result = input / divideBy will throw an unchecked exception if divideBy = 0. OOP error handling by throwing exceptions…… Read more ›...



06: Java FP – handling checked exceptions

FP error handling – checked exceptions The code below breaks the flow of execution as the input “ABC” throws a checked … … Read more ›...



07: Java FP – CompletableFuture monadic chaining with examples – part 1

This extends Future Vs. CompletableFuture interview Q&As with Java 8 functional programming (i.e. FP). Q1. Why was CompletableFuture introduced in Java … … Read more ›...



08: CompletableFuture monadic chaining with examples – part 2

This extends Java FP – CompletableFuture monadic chaining with examples – part 1. f and g are processed asynchronously, and …… Read more ›...



09: Java FP – CompletableFuture Error Handling

handle(…) returns a result or an exception A dummy exception is thrown from “f” to demonstrate an exceptional scenario. The “java.util.concurrent.ExecutionException” … … Read more ›...



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