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Java Standard Edition (SE)

Callable


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 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


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