Java Tech Workshop

Sep 27, 2026 · Backend Development

Java Stream API in Practice: From 80 Lines to 30 — Deduplication, Grouping, Sorting & Statistics

A hands-on guide demonstrating how Java Stream API reduces a real-world reporting task from 78 lines to 17, covering deduplication strategies, multi-level sorting pitfalls, grouping with downstream collectors, and one-pass statistics using IntSummaryStatistics.