diff --git a/akka-actor/src/main/scala/akka/japi/JavaAPI.scala b/akka-actor/src/main/scala/akka/japi/JavaAPI.scala
index 0ab5baf24d..1c468a639f 100644
--- a/akka-actor/src/main/scala/akka/japi/JavaAPI.scala
+++ b/akka-actor/src/main/scala/akka/japi/JavaAPI.scala
@@ -45,6 +45,19 @@ trait Effect {
   def apply(): Unit
 }
 
+/**
+ * Java API: Defines a criteria and determines whether the parameter meets this criteria.
+ */
+trait Predicate[T] {
+  def test(param: T): Boolean
+}
+
+/**
+ * Java API: Represents a tuple of two elements.
+ */
+@SerialVersionUID(1L)
+case class Pair[A, B](first: A, second: B)
+
 /**
  * A constructor/factory, takes no parameters but creates a new value of type T every call.
  */