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Showing content from https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/util/concurrent/Callable.html below:

Callable (Java SE 20 & JDK 20)

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.

A task that returns a result and may throw an exception. Implementors define a single method with no arguments called

.

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

  Computes a result, or throws an exception if unable to do so.

• Method Details
  • call

    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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