基于JPCAP采集流量的

import java.io.*;
import jpcap.*;
import java.util.*;
import java.text.*;
import jpcap.packet.*;
public class JpcapTip implements JpcapHandler {//JpcapHandler 出错
      static int j=0;
      static long p=0,q=0;
      IPPacket ip;
      String s,s1;
      Long s2;
     static long time11,time12;
      
      public void handlePacket(Packet packet){
         
          if(packet instanceof IPPacket)
          { 
              System.out.println("ok");
              ip=(IPPacket)packet;
              
              if(j<2000)
              { 
                              try {
            RandomAccessFile rf = new RandomAccessFile("packet3.txt", "rw");
                      rf.seek(rf.length());
                      rf.writeBytes(ip.src_ip+"\t"+ip.dst_ip+"\t"+ip.protocol+"\t"+
                      ip.length+"\t"+ip.version+"\t"+ip.ident+"\t"+
                      ip.rsv_frag+"\t"+ip.offset+"\t"+ip.hop_limit+"\t"+
                      ip.rsv_tos+"\r\n");
                      rf.close();
                 }
                 catch (Exception e) {
                      e.printStackTrace();
                 }
                 j++;

              }
              else 
              {
                time12=System.currentTimeMillis();
                System.out.println(""+time12+"-"+time11+"="+(time12-time11)+"\ncapture count:"+j);
               System.exit(0);
              }
          }
          
                   
      }

      public static void main(String[] args) throws java.io.IOException
      {
         
         String[] devices = Jpcap.getDeviceList();//Jpcap出错
          String deviceName = devices[0];
         Jpcap jpcap = Jpcap.openDevice(deviceName, 1028, true, 100);
                        //即将打开的设备名//
            //从设备上一次读取的最大字节数//
            //说明是否将设备设为混杂模式的Boolean值//
            //超时值//
          time11=System.currentTimeMillis();
          while(true)
          {
          
          jpcap.loopPacket(10, new JpcapTip());

          }
          
          
      }
     
     
} 这里JpcapHandler，Jpcap出错！
是怎么回事？请高手帮忙 --------------------编程问答-------------------- 同楼主，我的也是解析不到JpcapHandler

补充：Java ,  Eclipse