Core Java updates

If you approach JDK 26 expecting “new APIs”, you’ll miss the bigger picture.

👉 This release is about refining what Java introduced over the last few versions
👉 Especially around concurrency, performance, and developer safety

So instead of jumping into code, we’ll first build context:

👉 What problem existed
👉 What changed over time
👉 What exactly improved in JDK 26