Timer--timer in Java

First, class overview

A timer is a timer tool that is used to schedule a specified task in a background thread. It can schedule a task to execute once or repeatedly.
TimerTask an abstract class whose subclasses represent a task that can be scheduled by the timer.

Second, the code example

Import  Java.util.Timer;

Import  Java.util.TimerTask;

Public class Reminder ... {  

Timer timer;

Public Reminder (int seconds) ... {  

Timer = New timer ();

Timer.schedule (new remindtask (), 0, seconds*); Use the Timer class to set a scheduled task, 0 refers to 0s to start execution, seconds*1000 means to execute once every seconds seconds

}

class Remindtask extends TimerTask ... {  

Public void run () ... {  

System.out.println ("Time ' s up!"   ); Tasks to be performed on a timed basis

Timer.cancel (); //terminate the timer thread   

}

}

Public static void main (String args[]) ... {  

System.out.println ("About to schedule task." )  );

New  Reminder (5);

System.out.println ("Task scheduled." )  );

}

}

Note :

Each timer corresponds only to a single thread;
The timer does not guarantee that the task executes very precisely;
The Timer class is thread-safe.

Timer--timer in Java