ExecutorService.execute()

void java.util.concurrent.Executor.execute(Runnable command)

• execute

  void execute(Runnable command)

  Executes the given command at some time in the future. The command may execute in a new thread, in a pooled thread, or in the calling thread, at the discretion of the Executor implementation.

  Parameters:

  command - the runnable task

  Throws:

  RejectedExecutionException - if this task cannot be accepted for execution

  NullPointerException - if command is null 

原文：http://www.cnblogs.com/xxdfly/p/5635506.html