CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

There is a Java Void -- uppercase V-- reference type . The only situation I have ever seen it used is to parameterize Callable s final Callable<Void> callable = new Callable<Void>() { public Void call() { foobar(); return null; } }; Are there any other uses for the Java Void reference type? Can it ever be assigned anything other than null ? If yes, do you have examples?