update doc

Author: codetojoy

README.md

@@ -7,6 +7,42 @@
 ### Notes, SEP 2025
 
 * SEP 2025: see `jdk-25` branch for Java 25 (work in progress)
+* eggs work with Bash, Gradle, or Maven
+
+### Index
+
+* egg_1_max_p_threads
+    * demo max # of platform threads
+* egg_2_max_v_threads
+    * demo max # of virtual threads
+* egg_3_legacy_exec
+    * illustrates legacy executor/thread pool 
+* egg_4_virtual_exec
+    * illustrates virtual threads via ExecutorService
+* egg_5_sc_invoke_all
+    * structured concurrency
+    * two tasks: `foo` and `bar`
+        - can be configured to succeed or fail
+        - when one task is configured to fail, the other is interrupted
+* egg_6_sc_invoke_any
+    * structured concurrency
+    * task `foo` and task `bar` are in a race: first one to complete is used; the other is interrupted
+* egg_7_sc_deadline
+    * illustrates structured concurrency
+    * task `foo` and task `bar` take too long and exceed a deadline
+        - both are interrupted
+* egg_8_sc_custom_invoke_some
+    * this egg illustrates structured concurrency
+    * create `T` tasks
+        - use a custom `StructuredTaskScope.Joiner` to define success when `n` tasks complete 
+        - if familiar with `invokeAny()` and `invokeAll()`, this could be considered `invokeSome(n)`
+    * NOTE: highly contrived and NOT production-ready
+* egg_9_sc_fan_in
+    * simple `client` to send messages over a socket to a `server`
+    * NOTE: highly contrived and NOT production-ready
+* others
+    * see `jdk-19` branch
+    * these may not have been moved to `jdk-21` and definitely not `jdk-25`
 
 ### Notes, SEP 2023
 

egg_4_virtual_exec/README.md

@@ -4,8 +4,6 @@ Summary:
 
 * this egg illustrates virtual threads via ExecutorService
     - it acts like a thread-pool but it is just a facade for the familiar API
-* this egg uses:
-    - Java 19 (preview) virtual threads
 
 Build Notes:
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