bayou.util.function

Interface Callable_Void

All Superinterfaces:

Callable<Void>

public interface Callable_Void
extends Callable<Void>

An adapter of Callable<Void> for void-returning lambda expressions and method references.

Intended usage: Some APIs accept Callable<Void>, for example

     public static <T> void foo(Callable<T> action)
 

which, unfortunately, is not compatible with void-returning lambda expressions and method references, for example

    foo( ()->System.gc() );   // does NOT compile
    foo( System::gc );        // does NOT compile
 

This adapter interface provides a workaround:

    foo( (Callable_Void) ()->System.gc() )
    foo( (Callable_Void) System::gc )
 

Method Summary

Abstract Method
void	call_void() The single abstract method, which returns void (instead of Void).
Default Method
Void	call() Implements Callable<Void>.call(), as: { call_void(); return null; }

Method Detail

call_void

void call_void()
        throws Exception

The single abstract method, which returns void (instead of Void).

Throws:

Exception

call

default Void call()
           throws Exception

Implements Callable<Void>.call(), as: { call_void(); return null; }

Specified by:

call in interface Callable<Void>

Returns:

(Void)null

Throws:

Exception