| Name | Description | Type | Package | Framework |
| Creator | A constructor/factory, takes no parameters but creates a new value of type T every call. | Interface | akka.japi.function | Akka |
| Effect | An executable piece of code that takes no parameters and doesn't return any value. | Interface | akka.japi.function | Akka |
| Function | A Function interface. | Interface | akka.japi.function | Akka |
| Function10 | A Function interface. | Interface | akka.japi.function | Akka |
| Function11 | A Function interface. | Interface | akka.japi.function | Akka |
| Function12 | A Function interface. | Interface | akka.japi.function | Akka |
| Function13 | A Function interface. | Interface | akka.japi.function | Akka |
| Function14 | A Function interface. | Interface | akka.japi.function | Akka |
| Function15 | A Function interface. | Interface | akka.japi.function | Akka |
| Function16 | A Function interface. | Interface | akka.japi.function | Akka |
| Function17 | A Function interface. | Interface | akka.japi.function | Akka |
| Function18 | A Function interface. | Interface | akka.japi.function | Akka |
| Function19 | A Function interface. | Interface | akka.japi.function | Akka |
| Function2 | A Function interface. | Interface | akka.japi.function | Akka |
| Function2 | A Function interface. | Interface | akka.japi | Akka |
| Function20 | A Function interface. | Interface | akka.japi.function | Akka |
| Function21 | A Function interface. | Interface | akka.japi.function | Akka |
| Function22 | A Function interface. | Interface | akka.japi.function | Akka |
| Function3 | A Function interface. | Interface | akka.japi.function | Akka |
| Function4 | A Function interface. | Interface | akka.japi.function | Akka |
| Function5 | A Function interface. | Interface | akka.japi.function | Akka |
| Function6 | A Function interface. | Interface | akka.japi.function | Akka |
| Function7 | A Function interface. | Interface | akka.japi.function | Akka |
| Function8 | A Function interface. | Interface | akka.japi.function | Akka |
| Function9 | A Function interface. | Interface | akka.japi.function | Akka |
| Predicate | Java API: Defines a criteria and determines whether the parameter meets this criteria. | Interface | akka.japi.function | Akka |
| Procedure | A Procedure is like a Function, but it doesn't produce a return value. | Interface | akka.japi.function | Akka |
| Procedure10 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure11 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure12 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure13 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure14 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure15 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure16 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure17 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure18 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure19 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure2 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure20 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure21 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure22 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure3 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure4 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure5 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure6 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure7 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure8 | A Consumer interface. | Interface | akka.japi.function | Akka |
| Procedure9 | A Consumer interface. | Interface | akka.japi.function | Akka |