java定时器应用举例

package myThread;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

public class TimerUse {

    public static void main(String[] args) {
	PickTask pt = new PickTask();
	pt.start(1, 3);
    }
}

class PickTask {

    private Timer timer;

    public PickTask() {
	timer = new Timer();
    }

    private TimerTask task = new TimerTask() {

	public void run() {
	    try {
		BufferedReader br = new BufferedReader(new FileReader("D:\\a.txt"));
		String data = null;
		while ((data = br.readLine()) != null) {
		    System.out.println(data);
		}
	    } catch (FileNotFoundException e) {
		System.out.println("can not find the file");
	    } catch (IOException e) {
		e.printStackTrace();
	    }
	}
    };

    public void start(int delay, int internal) {
	timer.schedule(task, delay * 1000, internal * 1000);
    }
}