showtime.java

这是一个jsp + sql server在线测试系统,可供初学者参考

package webtest;
import java.util.*;
import java.text.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.io.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: 天津财经学院  信息管理与信息系统——高职升本0101班
 * @author 王刚
 * @version 1.0
 */

public class ShowTime extends Applet {
  boolean isStandalone = false;
  String timelay="";
  long time=0;
  //Construct the applet
  public ShowTime() {
  }

  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Initialize the applet
  public void init() {
    try {
      Thread a =new Thread (new clock ());

      a.start();
     }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  public void paint(Graphics g){
    g.drawString(timelay,25,25);
  }

  private void setTime(long nowtime){
    long hours,minutes,seconds;
    hours=nowtime/3600;
    minutes=nowtime/60-hours*60;
    seconds=nowtime-minutes*60;
    timelay=hours+":"+minutes+":"+seconds;
    time=nowtime;
  }

  public long getTime(){
    return time;
  }
  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }
  //Get parameter info
  public String[][] getParameterInfo() {
    return null;
  }

  class  clock  implements  Runnable
  {
    long time=0;
    clock (){}
    public void run ()
    {
      while (true)
      {
        try
        {
          Thread.sleep(1000);
        }
        catch (Exception e)
        {}
        time=time+1;
        setTime(time);
        repaint();
      }
    }
  }
}