What class is timertask in java?

TimerTask is an abstract class that implements the Runnable interface, representing a task that can be executed by a Timer.

The Timer class is a threading facility that can be used to schedule a task to be executed once or regularly repeated at a certain time or after a certain period of time. This function is used in conjunction with TimerTask. The TimerTask class is used to implement a task that is scheduled to be executed once or repeatedly by a Timer. Each Timer object corresponds to a thread, so the tasks performed by the timer should be completed quickly, otherwise the execution of subsequent tasks will be delayed.

void cancel()

// Terminate this timer and discard all currently scheduled tasks.

int purge()

//Remove all canceled tasks from this timer's task queue.

void schedule(TimerTask task, Date time)

//Schedule execution of the specified task at the specified time.

void schedule(TimerTask task, Date firstTime, long period)

//Schedule the specified task to start repeated fixed delay execution at the specified time.

void schedule(TimerTask task, long delay)

//Schedule execution of the specified task after the specified delay.

void schedule(TimerTask task, long delay, long period)

//Schedule the specified task for repeated fixed delay execution starting from the specified delay.

void scheduleAtFixedRate(TimerTask task, Date firstTime, long period)

//Schedule the specified task to start repeated fixed-rate execution at the specified time.

void scheduleAtFixedRate(TimerTask task, long delay, long period)

//Schedule the specified task to start repeated fixed-rate execution after the specified delay.

boolean cancel()

//Cancel this timer task.

abstract void run()

//The operation to be performed by this timer task.

long scheduledExecutionTime()

//Returns the most recent scheduled execution time of this task.

package zzs.time.demo;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.TimerTask;

public class MyTask extends TimerTask {

@Override

public void run() {

p>

// TODO Auto-generated method stub

SimpleDateFormat simpleDateFormat=null;

simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd HH: mm: ss: SSS ");

System.out.println("The current system time is: " simpleDateFormat.format(new Date()));

}

}

package zzs.time.demo;

import java.util.Timer;

public class TestTask {

/**

* @param args

* @throws InterruptedException

*/

public static void main( String[] args) throws InterruptedException {

// TODO Auto-generated method stub

Timer timer=new Timer();

MyTask myTask=new MyTask ();

timer.schedule(myTask, 1000, 2000);

// Thread.sleep(5000);

//timer.cancel( );

}

}

Running results:

The current system time is: 2011-07-10 15:37: 44:831

The current system time is: 2011-07-10 15:37:46:786

The current system time is: 2011-07-10 15:37: 48:786

The current system time is: 2011-07-

10 15:37:50:786

The current system time is: 2011-07-10 15:37:52:786

The current system time is: 2011-07- 10 15:37:54:786