Module java.base

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:
    Executor
    • Method Detail

      • 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