Module java.base
Package java.util.concurrent

Interface Callable<V>

Type Parameters:
V - the result type of methodcall
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.
@FunctionalInterfacepublic interfaceCallable<V>
A task that returns a result and may throw an exception. Implementors define a single method with no arguments calledcall.

TheCallable interface is similar toRunnable, in that both are designed for classes whose instances are potentially executed by another thread. ARunnable, however, does not return a result and cannot throw a checked exception.

TheExecutors class contains utility methods to convert from other common forms toCallable classes.

Since:
1.5
See Also:

  • Method Summary

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

  • Method Details

    • call

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