Java 27 and 26: runnable demos and captured output for every JEP, plus version lanes

Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3
2026-09-21 15:08:50 +00:00
commit f59c1de96d
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+// Thread.stop() has thrown UnsupportedOperationException since 20. In 26 the method itself is gone.
+public class ThreadStopGone {
+    public static void main(String[] args) {
+        Thread t = new Thread(() -> {});
+        t.stop();
+    }
+}