move custom config example in Java into a code file

akka-docs/general/code/akka/docs/config/ConfigDoc.java

@@ -0,0 +1,30 @@
+/**
+ * Copyright (C) 2009-2012 Typesafe Inc. <http://www.typesafe.com>
+ */
+package akka.docs.config;
+
+public class CustomConfig {
+  public ActorSystem createConfiguredSystem() {
+    //#java-custom-config
+    // make a Config with just your special setting
+    Config myConfig =
+      ConfigFactory.parseString("something=somethingElse");
+    // load the normal config stack (system props,
+    // then application.conf, then reference.conf)
+    Config regularConfig =
+      ConfigFactory.load();
+    // override regular stack with myConfig
+    Config combined =
+      myConfig.withFallback(regularConfig);
+    // put the result in between the overrides
+    // (system props) and defaults again
+    Config complete =
+      ConfigFactory.load(combined);
+    // create ActorSystem
+    ActorSystem system =
+      ActorSystem.create("myname", complete);
+    //#java-custom-config
+    return system;
+  }
+}
+

akka-docs/general/configuration.rst

@@ -159,25 +159,8 @@ you could put a config string in code using
 You can also combine your custom config with the usual config,
 that might look like:
 
-.. code-block:: java
+.. includecode:: code/akka/docs/config/ConfigDoc.java
-
+   :include: java-custom-config
-  // make a Config with just your special setting
-  Config myConfig =
-    ConfigFactory.parseString("something=somethingElse");
-  // load the normal config stack (system props,
-  // then application.conf, then reference.conf)
-  Config regularConfig =
-    ConfigFactory.load();
-  // override regular stack with myConfig
-  Config combined =
-    myConfig.withFallback(regularConfig)
-  // put the result in between the overrides
-  // (system props) and defaults again
-  Config complete =
-    ConfigFactory.load(combined)
-  // create ActorSystem
-  ActorSystem system =
-    ActorSystem.create("myname", complete)
 
 When working with ``Config`` objects, keep in mind that there are
 three "layers" in the cake:
@@ -198,7 +181,6 @@ To stack two layers, use ``override.withFallback(fallback)``; try
 to keep system props (``defaultOverrides()``) on top and
 ``reference.conf`` (``defaultReference()``) on the bottom.
 
-
 Custom application.conf
 -----------------------