private static void createThreadPool(){
  if (mThreadPoolSize <= 0) {
    mExecutorService=Executors.newCachedThreadPool();
  }
 else {
    mExecutorService=Executors.newFixedThreadPool(mThreadPoolSize);
  }
}

private static void createThreadPool ( ) { if ( mThreadPoolSize <= 0 ) { mExecutorService = Executors . newCachedThreadPool ( ) ; } else { mExecutorService = Executors . newFixedThreadPool ( mThreadPoolSize ) ; } }
create a thread pool .
