The problem with Java 8 → Java 21 migrations
If you're working on a Java 8 codebase — or trying to break into banking and legacy system roles — this article is for you. Every Java 8 codebase has the same problems. You know they exist, but finding and fixing them across 50,000 lines is slow:
double for monetary values → silent FX
precision loss in production
Unguarded order.getCounterparty().getAccount(






