Hooks

1: The Role

　　Trigger logic code that is executed before the end of the thread

　　Application stops sending alerts (email, SMS, message nails etc.); Close some connections

 

2: Use

  // hooks 
  Runtime.getRuntime () addShutdownHook (. New new the Thread (() -> {
     System.out.println ( "hooks: The End reminder" ); // do some tasks
  }));