callableexample.java

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/**
 *  Example code for JavaOne hands-on J2SE lab
 *
 *  Concurrency utilities (JSR-166) example
 **/
package future;

import java.net.*;
import java.io.*;
import java.util.concurrent.*;

/**
 *  A simple implementation of the Callable interface that can return a value
 *  to the thread that started it
 **/
public class CallableExample implements Callable<String> {
  /**
   *  The entry point called when this object is invoked as a new thread
   *  of execution
   *
   * @returns A String as a simple result
   **/
  public String call() {
    System.out.println("Starting call() method in second thread");

    try {
      Thread.sleep(500);
    } catch (InterruptedException ie) {
      // Ignore
    }

    System.out.println("Completed call() method in second thread");
    return "Finished";
  }
}