jpcap问题（菜鸟级）

[jack1219]

import jpcap.*;
import jpcap.packet.*;
import java.io.*;

public class JpcapTest implements PacketReceiver{

public void receivePacket(Packet p){

System.out.println("***********分析数据包*******************");

//System.out.println(p.toString());

System.out.println("长度:\t"+p.caplen);

System.out.println("数据头：\t");

for(int i=0;i<p.header.length;i++){

System.out.print(Byte.toString(p.header[i]));

}

System.out.println();

System.out.println("IP包属性:");

System.out.println("源IP:\t"+ ((IPPacket)p).src_ip.toString() );

System.out.println("目标IP：\t"+ ((IPPacket)p).dst_ip.toString() );

System.out.println("***********分析数据包*******************");

}



public static void main(String[] args) throws IOException{

NetworkInterface[] devices = jpcap.JpcapCaptor.getDeviceList();

for(int i=0;i<devices.length;i++){

System.out.println("DEVICES "+i+":");

System.out.println("name:\t"+devices[i].name);

System.out.println("description:\t"+devices[i].description);

System.out.println("datalink_name:\t"+devices[i].datalink_name);

System.out.println("datalink_description:\t"+devices[i].datalink_description);

System.out.println("mac_address:\t");

for(int j=0;j<devices[i].mac_address.length;j++){

System.out.print(Integer.toHexString(devices[i].mac_address[j]&0xff) + ":");
}

System.out.println();

System.out.println("NetworkInterfaceAddress:\t");

for(int j=0;j<devices[i].addresses.length;j++){




System.out.println("address:\t"+devices[i].addresses[j].address);


System.out.println("broadcast:\t"+devices[i].addresses[j].broadcast);


System.out.println("destination:\t"+devices[i].addresses[j].destination);

System.out.println("subnet:\t"+devices[i].addresses[j].subnet);

}

}

System.out.println("***********************************");



JpcapCaptor cap = jpcap.JpcapCaptor.openDevice(devices[1],1028,true,10000);

cap.loopPacket(-1,new JpcapTest());

}

}

[jack1219]

DING DING DING

[jack1219]

编译后发现如下问题：

C:\j2sdk1.4.2_04\bin>javac JpcapTest.java
JpcapTest.java:9: cannot access jpcap.PacketReceiver
bad class file: C:\j2sdk1.4.2_04\jre\lib\ext\jpcap.jar(jpcap/PacketReceiver.clas
s)
class file has wrong version 49.0, should be 48.0
Please remove or make sure it appears in the correct subdirectory of the classpa
th.
public class JpcapTest implements PacketReceiver{
^
1 error

[jack1219]

有顶必给分

[gz80]

class file has wrong version 49.0, should be 48.0

lz不懂英文？