util.concurrent Java并发开发包

util.concurrent是一个Java语言的并发开发包，示例代码：

publicclassExecutor{   privatestaticLoggerlogger=Logger.getLogger(Executor.class);   privatestaticPooledExecutorexecutor=newPooledExecutor(5);      static{      executor.setMinimumPoolSize(2);      executor.setMaximumPoolSize(10);      executor.setKeepAliveTime(1000*60*10);   }      publicstaticvoidexecute(Runnablerunnable){      try{         executor.execute(runnable);      }      catch(Exceptione){         logger.error("Exceptionwhilerunningtask:"+e,e);      }   }}