Scala example source code file (Callable.java)

This example Scala source code file (Callable.java) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

actor, callable, exception, object, thread, threadpool

The Callable.java Scala example source code

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/licenses/publicdomain
 */

package scala.actors.threadpool;

/**
 * A task that returns a result and may throw an exception.
 * Implementors define a single method with no arguments called
 * <tt>call</tt>.
 *
 * <p>The <tt>Callable</tt> interface is similar to {@link
 * java.lang.Runnable}, in that both are designed for classes whose
 * instances are potentially executed by another thread.  A
 * <tt>Runnable</tt>, however, does not return a result and cannot
 * throw a checked exception.
 *
 * <p> The {@link Executors} class contains utility methods to
 * convert from other common forms to <tt>Callable</tt> classes.
 *
 * @see Executor
 * @since 1.5
 * @author Doug Lea
 */
public interface Callable {
    /**
     * Computes a result, or throws an exception if unable to do so.
     *
     * @return computed result
     * @throws Exception if unable to compute a result
     */
    Object call() throws Exception;
}