Code example for FutureTask

Methods: isCancelled

     * @return <tt>true</tt> if task was cancelled before it completed 
     * @see #cancel(boolean) 
    public final boolean isCancelled() { 
        return mFuture.isCancelled();
     * Attempts to cancel execution of this task.  This attempt will 
     * fail if the task has already completed, already been cancelled, 
     * or could not be cancelled for some other reason. If successful, 
     * and this task has not started when <tt>cancel</tt> is called, 
     * this task should never run.  If the task has already started, 
     * then the <tt>mayInterruptIfRunning</tt> parameter determines 
     * whether the thread executing this task should be interrupted in 
     * an attempt to stop the task. 
     * @param mayInterruptIfRunning <tt>true</tt> if the thread executing this 
     *        task should be interrupted; otherwise, in-progress tasks are allowed 
     *        to complete.