compact1, compact2, compact3

java.util.concurrent

Interface Callable<V>

Type Parameters:

V - the result type of method call

All Known Subinterfaces:

DocumentationTool.DocumentationTask, JavaCompiler.CompilationTask

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

See Also:

Executor

Method Summary

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

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