code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.concurrent.FutureTask;
  
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
   * CA 95054 USA or visit www.sun.com if you need additional information or
   * have any questions.
   */
  
  /*
   * @test
   * @bug 6415572
   * @summary Check exceptional behavior in run and done methods
   */
  
  import java.util.concurrent.*;
  
  public class Throw {
  
      @SuppressWarnings("deprecation")
      static void THROW(final Throwable t) {
          if (t != null)
              Thread.currentThread().stop(t);
      }
  
      Callable<Void> thrower(final Throwable t) {
          return new Callable<Void>() { public Void call() {
              THROW(t); return null; }};
      }
  
      @SuppressWarnings("serial")
      private static class DoneError extends Error {}
  
      @SuppressWarnings("serial")
      private static class DoneException extends RuntimeException {}
  
      static class MyFutureTask extends FutureTask<Void> {
          MyFutureTask(Callable<Void> task) { super(task); }
          public boolean runAndReset() { return super.runAndReset(); }
      }
  
      MyFutureTask checkTask(final MyFutureTask task) {
          check(! task.isCancelled());
          check(! task.isDone());
          return task;
      }
  
      MyFutureTask taskFor(final Throwable callableThrowable,
                           final Throwable doneThrowable) {
          return checkTask(
              new MyFutureTask(thrower(callableThrowable)) {
                  protected void done() { THROW(doneThrowable); }});
      }
  
      void test(String[] args) throws Throwable {
          final Throwable[] callableThrowables = {
              null, new Exception(), new Error(), new RuntimeException() };
          final Throwable[] doneThrowables = {
              new DoneError(), new DoneException() };
          for (final Throwable c : callableThrowables) {
              for (final Throwable d : doneThrowables) {
                  THROWS(d.getClass(),
                         new F(){void f(){
                             taskFor(c, d).cancel(false);}},
                         new F(){void f(){
                             taskFor(c, d).run();}});
                  if (c != null)
                      THROWS(d.getClass(),
                             new F(){void f(){
                                 taskFor(c, d).runAndReset();}});
              }
  
              try {
                  final MyFutureTask task = taskFor(c, null);
                  check(task.cancel(false));
                  THROWS(CancellationException.class,
                         new F(){void f() throws Throwable { task.get(); }});
              } catch (Throwable t) { unexpected(t); }
  
              if (c != null) {
                  final MyFutureTask task = taskFor(c, null);
                  task.run();
                  try {
                      task.get();
                      fail("Expected ExecutionException");
                  } catch (ExecutionException ee) {
                      equal(c.getClass(), ee.getCause().getClass());
                  } catch (Throwable t) { unexpected(t); }
              }
  
              if (c != null) {
                  final MyFutureTask task = taskFor(c, null);
                  task.runAndReset();
                  try {
                      task.get();
                      fail("Expected ExecutionException");
                  } catch (ExecutionException ee) {
                      check(c.getClass().isInstance(ee.getCause()));
                  } catch (Throwable t) { unexpected(t); }
              }
          }
      }
  
      //--------------------- Infrastructure ---------------------------
      volatile int passed = 0, failed = 0;
      void pass() {passed++;}
      void fail() {failed++; Thread.dumpStack();}
      void fail(String msg) {System.err.println(msg); fail();}
      void unexpected(Throwable t) {failed++; t.printStackTrace();}
      void check(boolean cond) {if (cond) pass(); else fail();}
      void equal(Object x, Object y) {
          if (x == null ? y == null : x.equals(y)) pass();
          else fail(x + " not equal to " + y);}
      public static void main(String[] args) throws Throwable {
          new Throw().instanceMain(args);}
      void instanceMain(String[] args) throws Throwable {
          try {test(args);} catch (Throwable t) {unexpected(t);}
          System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
          if (failed > 0) throw new AssertionError("Some tests failed");}
      abstract class F {abstract void f() throws Throwable;}
      void THROWS(Class<? extends Throwable> k, F... fs) {
          for (F f : fs)
              try {f.f(); fail("Expected " + k.getName() + " not thrown");}
              catch (Throwable t) {
                  if (k.isAssignableFrom(t.getClass())) pass();
                  else unexpected(t);}}
  }
  