stopwatch.java

通过JPCAP实现对网络流量的监控通过JPCAP实现对网络流量的监控

package cappacket;

import java.awt.*;
import java.awt.event.*;
import java.util.Date;
import java.text.SimpleDateFormat;

public class StopWatch  extends Canvas implements Runnable {
  long startTime=0;
  long endTime=0;
  boolean bStart=false;
  
  public StopWatch()
  {
    this.enableEvents(AWTEvent.MOUSE_EVENT_MASK);
  }
  public void paint(Graphics g)
  {
    SimpleDateFormat sdf=new SimpleDateFormat("HH:mm:ss");
    Date elapsedTime=null;
    try
    {
      elapsedTime = sdf.parse("00:00:00");
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
    elapsedTime.setTime(elapsedTime.getTime()+(endTime - startTime));
    String strTime=sdf.format(elapsedTime);
    g.fill3DRect(0,0,78,28,true);
    g.setColor(Color.white);
    g.drawString(strTime,10,20);

  }

  protected void processMouseEvent(MouseEvent e)
  {
    if(e.getID()==MouseEvent.MOUSE_PRESSED)
    {
      startTime=endTime=System.currentTimeMillis();
      bStart=true;
      new Thread(this).start();;
      repaint();
    }
    else if(e.getID()==MouseEvent.MOUSE_RELEASED)
    {
      endTime=System.currentTimeMillis();
      bStart=false;
      repaint();
    }
  }

  public void run() 
  {
    while(bStart)
    {
      try {
        Thread.sleep(500);
      }
      catch (Exception e) {
      }
      endTime = System.currentTimeMillis();
      repaint();
    }
  }
}