Q42

What are two differences between Callable and Runnable?

A.

A callable can return a value when executing, but a Runnable cannot.

B.

A callable can be executed by a ExecutorService, but a Runnable cannot.

C.

A Callable can be passed to a Thread, but a Runnable cannot.

D.

A callable can throw an Exception when executing, but a Runnable cannot.

 

La risposta è A e D.

Infatti sebbene Runnable e Callable siano simili Runnable non restituisce un risultato e non può throware una checked exception.

Riferimenti:

http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Callable.html