Mimk-054-en-javhd-today-0901202101-58-02 Min Here

(In a real app you’d expose the service via JAX‑RS or Spring, but this keeps the focus on language features.)

Intrigued, Maya decided to dig deeper. She spent hours deciphering the code, and as she finally cracked it, she discovered a hidden message. The message led her to a secret underground virtual reality club, where the most brilliant minds in the tech world gathered to share their latest innovations.

| Timestamp | Segment | Core Content | |-----------|---------|--------------| | | Intro & Context | Why “HD” matters today; market pressure from micro‑services & serverless; Java’s 27‑year evolution story. | | 03:31‑12:00 | Java Language Refresh | Deep dive into sealed hierarchies , records & pattern matching ; live coding: converting a classic POJO hierarchy into a sealed‑record model. | | 12:01‑20:15 | Build‑Tool Revolution | Gradle 7.x incremental compilation vs. Maven 3.9; demo of ./gradlew assemble hitting < 1 sec for a 30‑module project. | | 20:16‑29:45 | Concurrency Re‑imagined – Project Loom | Virtual threads vs. platform threads; benchmarking a 10 k‑connection HTTP server (Loom ≈ 30 % lower CPU). | | 29:46‑38:30 | Native Image with GraalVM | End‑to‑end creation of a native Spring‑Boot micro‑service; cold start drops from 1.8 s → 48 ms . | | 38:31‑45:20 | Reactive & Event‑Driven | Micronaut + RxJava vs. traditional CompletableFuture ; why reactive remains relevant in a Loom‑enabled world. | | 45:21‑53:00 | Observability – JFR & OpenTelemetry | One‑line JFR enablement, custom events, exporting to OTEL collector; real‑time dashboards demo. | | 53:01‑58:02 | Wrap‑Up & Q&A | Future roadmap (Project Valhalla, Panama), best‑practice checklist, where to find the source repo. | MIMK-054-EN-JAVHD-TODAY-0901202101-58-02 Min

// src/main/java/com/example/todo/TodoService.java package com.example.todo;

In short: this is a concise, 58‑minute walkthrough of modern Java (8‑15) aimed at developers who already know the basics but want to bring their skills up‑to‑date with the language’s most productive features. (In a real app you’d expose the service

public record Todo( long id, String title, boolean completed) {}

The coded title is more than a label: it’s a compact argument about what matters—origin, audience, fidelity, the present—and how we choose to hold time. Use the unpacking above as a toolkit: orient, interpret, and act. | Timestamp | Segment | Core Content |

Below are the exact snippets Dr. Hsu typed in the video (cleaned up for readability).