Callable
@FunctionalInterface interface Callable<V : Any!>
| java.util.concurrent.Callable | 
A task that returns a result and may throw an exception. Implementors define a single method with no arguments called call. 
The Callable interface is similar to , 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.
Summary
| Public methods | |
|---|---|
| abstract V | call()Computes a result, or throws an exception if unable to do so. | 
Public methods
call
abstract fun call(): V
Computes a result, or throws an exception if unable to do so.
| Return | |
|---|---|
| V | computed result | 
| Exceptions | |
|---|---|
| java.lang.Exception | if unable to compute a result | 
