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

docs/output/73-removed-in-26.txt

@@ -0,0 +1,34 @@
+# Source that compiled on 25 and does not on 26
+
+=== recap26/src/broken/AppletGone.java
+  javac (JDK 25, --release 25): exit 0
+      <repo>/recap26/src/broken/AppletGone.java:5: warning: [removal] Applet in java.applet has been deprecated and marked for removal
+      public class AppletGone extends Applet {
+                                      ^
+      1 warning
+  javac (JDK 26, --release 26): exit 1
+      <repo>/recap26/src/broken/AppletGone.java:3: error: package java.applet does not exist
+      import java.applet.Applet;
+                        ^
+      <repo>/recap26/src/broken/AppletGone.java:5: error: cannot find symbol
+      public class AppletGone extends Applet {
+                                      ^
+        symbol: class Applet
+      <repo>/recap26/src/broken/AppletGone.java:6: error: init() in AppletGone does not override or implement a method from a supertype
+          @Override public void init() { System.out.println("applet init"); }
+          ^
+      3 errors
+
+=== recap26/src/broken/ThreadStopGone.java
+  javac (JDK 25, --release 25): exit 0
+      <repo>/recap26/src/broken/ThreadStopGone.java:5: warning: [removal] stop() in Thread has been deprecated and marked for removal
+              t.stop();
+               ^
+      1 warning
+  javac (JDK 26, --release 26): exit 1
+      <repo>/recap26/src/broken/ThreadStopGone.java:5: error: cannot find symbol
+              t.stop();
+               ^
+        symbol:   method stop()
+        location: variable t of type Thread
+      1 error