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
152 changed files with 5049 additions and 0 deletions
@@ -0,0 +1,19 @@
+$ javac --enable-preview --release 26 StructuredScope26.java      (JDK 26)
+exit=0
+
+$ javac --enable-preview --release 27 StructuredScope26.java      (JDK 27)
+StructuredScope26.java:12: error: wrong number of type arguments; required 3
+        try (StructuredTaskScope<String, List<String>> scope =
+                                ^
+StructuredScope26.java:17: error: cannot find symbol
+        } catch (StructuredTaskScope.FailedException e) {
+                                    ^
+  symbol:   class FailedException
+  location: interface StructuredTaskScope
+StructuredScope26.java:19: error: cannot find symbol
+        } catch (StructuredTaskScope.TimeoutException e) {
+                                    ^
+  symbol:   class TimeoutException
+  location: interface StructuredTaskScope
+3 errors
+exit=1