java定期执行一个方法，java执行方法,在下面的例子中,我们使用

java定期执行一个方法，java执行方法,在下面的例子中,我们使用

在下面的例子中,我们使用DelayedMethod扩展了线程类。这个简称类通过构造函数来指定时间间隔，间隔执行。

import java.applet.*;import java.awt.*;import java.awt.event.*;import java.net.*;public class AnnoyingPopUps extends Applet implements    ActionListener {  Button b1, b2;  DelayedMethod dm;  int x = 0;  public void init() {     b1 = new Button("Start Annoying Popops");     b2 = new Button("Stop Annoying Popops");     add(b1); add(b2);     b1.addActionListener(this);b2.addActionListener(this);     dm = new DelayedMethod(this, 1000);  // 1 second     dm.start();     }  public void actionPerformed(ActionEvent ae) {     if (ae.getSource() == b1) {        dm.oktorun = true;        }     else if(ae.getSource() == b2) {        dm.oktorun = false;       }s     }  public void displayPopup() {    SimplePopUp d = new SimplePopUp();    d.show();    d.setLocation(x , x);    x = x + 5;    }  class SimplePopUp extends Dialog  {    SimplePopUp() {      super(new Frame(), "annoying popup");      this.addWindowListener       (new WindowAdapter() {           public void windowClosing(WindowEvent e) {              e.getWindow().dispose();              }           }       );     }   }  class DelayedMethod extends Thread {    AnnoyingPopUps myObj = null;  // customize for your need    boolean oktorun = false;    int delay;    DelayedMethod(AnnoyingPopUps myObj) {      this.myObj = myObj;      this.delay = 2000;      }    DelayedMethod(AnnoyingPopUps myObj, int delay) {      this.myObj = myObj;      this.delay = delay;      }    public void run() {      while (true) {        try {          sleep(delay);          if (oktorun)               myObj.displayPopup(); // customize this too!          }         catch (InterruptedException ignored) {}        }      }    }    }