jpcap抓包的小问题，求解！

还是老样子，先插部分源代码
package test3;import jpcap.JpcapCaptor;
import jpcap.NetworkInterface;
import jpcap.PacketReceiver;
import jpcap.packet.Packet;
import jpcap.packet.TCPPacket;
import java.io.*;public class Main {
public static void main (String args[] ){
captureThread c=new captureThread();
Thread startThread=new Thread(c,"captureThread");
startThread.start();
}
}
class captureThread implements Runnable 
{
JpcapCaptor jpcap=null;
    JpcapTip jTip=new JpcapTip();
    static String deviceName ;
   // static String lastURL;
public captureThread()
{
NetworkInterface[] devices=JpcapCaptor.getDeviceList();
for(NetworkInterface n : devices)
System.out.println(n.name + "    |      " + n.description );
System.out.println("------------------------------------");
try{
jpcap = JpcapCaptor.openDevice(devices[0], 1028, true, 100);
}catch(IOException ex)
{System.out.println(ex);};
}
    public void run() 
{
        while(true)
        {
         jpcap.loopPacket(-1, jTip);
         //lastURL = jTip.url;
        }
}
 }
  
 class JpcapTip implements PacketReceiver        //JpcapTip抓包主程序
{ 
  Decode d=new Decode();
  String decode="";
  String url="";
  GetURL get=new GetURL();
 // GetURLMeg g=new GetURLMeg();
  static int total=0;
static long HTTPtotal=0;
static int packageNumber=0;
static long number[][]=new long [10][20];
static long num[][]=new long [5][2];
    static long time_end=0;
    static long time_process=0;
    static byte[] tcpData;//null;
    byte[] packetdata=null;   //发送池
    boolean getEndTime=false;
TCPPacket tcpPacket=null;
String packageName;
String msg="";
    public void receivePacket(Packet p)    
{ 
total++;
     if(p instanceof TCPPacket)
{
     tcpPacket=(TCPPacket)p;
if(tcpPacket.src_port==80||tcpPacket.dst_port==80)//判断是否是HTTP包 
{   HTTPtotal++;  //原为IPtotal
System.out.println(total);
//System.out.println(tcp.src_port);
processHTTPPackage();
}
}
}      
public void processHTTPPackage()         //将包写入TXT文件中
{



}整个程序写好之后，抓到的包都是同一个包！！！郁闷之极求大神指点迷津