Module java.base
Package java.util.concurrent

Interface Callable<V>

Type Parameters:
V - the result type of method call
All Known Subinterfaces:
DocumentationTool.DocumentationTask, JavaCompiler.CompilationTask
All Known Implementing Classes:
JavacTask
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: