#22903 Fix code snippeds

* move scala and java sources out of paradox sources
* replace relative paths with $code$ and $akka$
* fix broken includes

akka-docs/src/main/java/jdocs/duration/Java.java

@@ -0,0 +1,27 @@
+/**
+ * Copyright (C) 2013-2017 Lightbend Inc. <http://www.lightbend.com>
+ */
+
+package jdocs.duration;
+
+//#import
+import scala.concurrent.duration.Duration;
+import scala.concurrent.duration.Deadline;
+//#import
+
+class Java {
+  public void demo() {
+    //#dsl
+    final Duration fivesec = Duration.create(5, "seconds");
+    final Duration threemillis = Duration.create("3 millis");
+    final Duration diff = fivesec.minus(threemillis);
+    assert diff.lt(fivesec);
+    assert Duration.Zero().lt(Duration.Inf());
+    //#dsl
+    //#deadline
+    final Deadline deadline = Duration.create(10, "seconds").fromNow();
+    final Duration rest = deadline.timeLeft();
+    //#deadline
+    rest.toString();
+  }
+}