Module javafx.base
Package javafx.util

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.