Interface Callback<P,R>

Type Parameters:: P - The type of the argument provided to the call method.; R - The type of the return type of the call method.

All Known Implementing Classes:: MapValueFactory, PropertyValueFactory, TreeItemPropertyValueFactory

Functional Interface:: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public interface Callback<P,R>

The Callback interface is designed to allow for a common, reusable interface to exist for defining APIs that requires a call back in certain situations.

Callback is defined with two generic parameters: the first parameter specifies the type of the object passed in to the call method, with the second parameter specifying the return type of the method.

Since:: JavaFX 2.0

Method Summary

Modifier and Type	Method	Description
`R`	`call(P param)`	The `call` method is called when required, and is given a single argument of type P, with a requirement that an object of type R is returned.

Method Details

call

R call(P param)

The call method is called when required, and is given a single argument of type P, with a requirement that an object of type R is returned.

Parameters:: param - The single argument upon which the returned value should be determined.
Returns:: An object of type R that may be determined based on the provided parameter value.

© 2008, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from JavaFX API Documentation.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Java, JavaFX and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.