Module java.base
Package java.util.concurrent

Interface Callable<V>

Type Parameters:
V - the result type of method call
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface 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.

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.

Since:
1.5
Author:
Doug Lea
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    V
    call()
    Computes a result, or throws an exception if unable to do so.

  • Method Details

    • call

      V call() throws Exception
      Computes a result, or throws an exception if unable to do so.
      Returns:
      computed result
      Throws:
      Exception - if unable to compute a result