Need of 𝑷𝑶𝑱𝑶 As dealing with complex JSON response is not straight forward so it's better to map them in to Java Objects Using POJO and then play with Java Objects.

Typical Collections: CopyOnWriteArrayList, ConcurrentHashMap (from java.util.concurrent). 𝗛𝗼𝘄 𝗶𝘁 𝘄𝗼𝗿𝗸𝘀 𝗶𝗻𝘁𝗲𝗿𝗻𝗮𝗹𝗹𝘆 ? Fail-safe iterators iterate over a cloned copy of the collection ...

A full-stack data pipeline that reads raw sales records from MySQL via JDBC, aggregates them in-memory using Java Collections, and serves the results to a responsive Chart.js dashboard — all without a ...

Stable implementation with almost 1,700 tests and enforced 100% test code coverage. Every single method, statement and conditional branch variant in the entire codebase is tested and required to pass ...