doc: filter and filterNot streams operator, #25468

akka-docs/src/test/java/jdocs/stream/operators/SourceOrFlow.java

@@ -348,4 +348,44 @@ class SourceOrFlow {
     // 2
     // #take-while
   }
+
+  void filterExample() {
+    // #filter
+    Source<String, NotUsed> words =
+        Source.from(
+            Arrays.asList(
+                ("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt "
+                        + "ut labore et dolore magna aliqua.")
+                    .split(" ")));
+
+    Source<String, NotUsed> longWords = words.filter(w -> w.length() > 6);
+
+    longWords.runWith(Sink.foreach(System.out::print), system);
+    // consectetur
+    // adipiscing
+    // eiusmod
+    // tempor
+    // incididunt
+    // #filter
+  }
+
+  void filterNotExample() {
+    // #filterNot
+    Source<String, NotUsed> words =
+        Source.from(
+            Arrays.asList(
+                ("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt "
+                        + "ut labore et dolore magna aliqua.")
+                    .split(" ")));
+
+    Source<String, NotUsed> longWords = words.filterNot(w -> w.length() <= 5);
+
+    longWords.runWith(Sink.foreach(System.out::print), system);
+    // consectetur
+    // adipiscing
+    // eiusmod
+    // tempor
+    // incididunt
+    // #filterNot
+  }
 }