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 14:47:46 +00:00
commit da55954922
150 changed files with 4968 additions and 0 deletions
@@ -0,0 +1,24 @@
+/**
+ * Thread.stop() on 25: still compiles (with a deprecation-for-removal warning) but has thrown
+ * UnsupportedOperationException since Java 20. It is REMOVED from the API in Java 26 (see recap26/src/broken/ThreadStopGone.java,
+ * docs/output/73-removed-in-26.txt). Thread.suspend() and resume() are checked the same way.
+ * Chapter: docs/14-lanes-21-to-25.md
+ */
+public class ThreadStopRuntime {
+    @SuppressWarnings({"removal", "deprecation"})
+    public static void main(String[] args) throws Exception {
+        System.out.println("java.version = " + System.getProperty("java.version"));
+        Thread t = new Thread(() -> {
+            try { Thread.sleep(1000); } catch (InterruptedException ignored) { }
+        });
+        t.start();
+        try {
+            t.stop();
+            System.out.println("Thread.stop(): accepted");
+        } catch (UnsupportedOperationException e) {
+            System.out.println("Thread.stop(): UnsupportedOperationException");
+        }
+        t.interrupt();
+        t.join();
+    }
+}