Java Learning notes: Java timed tasks

First, Introduction

It is often useful in applications to run timed tasks in the background. For example, the network operator will be a monthly data on the statistics. In Java we can inherit the TimerTask class to implement timed tasks.

Second, notes

/*** Scheduled Tasks * 1. Inherit the subclass of TimerTask (runable) * 2. Rewrite the Run method * 3. Write your own business in the Run method * 4. Start a scheduled task with the method provided by the Timer class *@authorHutiger **/ Public classTimetaskextendsTimerTask {PrivateTimer timer; Privatetimertask task;  Public Static voidMain (string[] args) {Timetask T=NewTimetask (); //T.start ();SimpleDateFormat Sddateformat =NewSimpleDateFormat ("Yyyy-mm-dd Hh:mm:ss");        Date date; Try{Date= Sddateformat.parse ("2016-09-23 15:32:00");        T.start (date); } Catch(ParseException e) {//TODO Auto-generated catch blockE.printstacktrace (); }} @Override Public voidrun () {//TODO Auto-generated method stubs    }     Public voidStart (date date) {if(Timer = =NULL) {Timer=NewTimer (); }        if(Task = =NULL) {Task=NewMyTimer ();                } timer.schedule (task, date); //start execution within a certain time after the program startsTimer.schedule (Task, 5000,1000); //If the set time is obsolete, it will run from the current timeTimer.schedule (Task, date,1000); //if the setting is obsolete, it will be executed from the setup time and the completedTimer.scheduleatfixedrate (Task, date, 1000); }     Public voidStop () {if(Task! =NULL) {task.cancel (); }        if(Timer! =NULL) {timer.cancel (); } Task=NULL; Timer=NULL; }}classMyTimerextendsTimerTask {@Override Public voidrun () {//TODO Auto-generated method stubsSystem.out.println ("Tasks scheduled for execution"); }}

Java Learning notes: Java timed tasks