How to Add Token Swaps to Java Spring Boot

Java runs the financial world. With over 90% of Fortune 500 companies using Java and the language holding steady at third in the TIOBE Index with an 8.71% rating, it remains the default for enterprise backend systems. Now those same systems are moving on-chain: 84% of fintech companies include blockchain in their payment infrastructure, and enterprise blockchain spending hit $19 billion in 2025. This guide shows you how to add token swap functionality to a Spring Boot application using a free RE