Explanation/Reference:
Explanation:
public interface Callable<V>
A task that returns a result and may throw an exception. Implementors define a single method with no
arguments called call.
Note:
Interface Callable<V>
Type Parameters:
V - the result type of method call
The Callable interface is similar to Runnable, in that both are designed for classes whose instances are
potentially executed by another thread. A Runnable, however, does not return a result and cannot throw a
checked exception.
The Executors class contains utility methods to convert from other common forms to Callable classes.
Reference:java.util.concurrent