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

      All Methods Instance Methods Abstract Methods 
      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 Detail

      • 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.