packet capturing

[visal]

hi
Please help me.i am developing a java pgm to capture network packets using jpcap.i downloded jpcap and wpcap dll files.
My pgm is:

import jpcap.JpcapHandler;
import jpcap.Jpcap;
import jpcap.Packet;
public class sample implements JpcapHandler {
public void handlePacket(Packet packet){
System.out.println(packet);
}
public static void main(String[] args) throws java.io.IOException{
String[] devices = Jpcap.getDeviceList();
for (int i = 0; i < devices.length; i++) {
System.out.println(devices);
}
String deviceName = devices[0];
Jpcap jpcap = Jpcap.openDevice(deviceName, 1028, false, 1);
jpcap.loopPacket(-1, new sample());
}
}
when i run this pgm i got the following errors.

C:\Program Files\Java\jre1.5.0\bin>javac sample.java
sample.java:1: cannot find symbol
symbol : class JpcapHandler
location: package jpcap
import jpcap.JpcapHandler;
^
sample.java:2: cannot find symbol
symbol : class Jpcap
location: package jpcap
import jpcap.Jpcap;
^
sample.java:3: cannot find symbol
symbol : class Packet
location: package jpcap
import jpcap.Packet;
^
sample.java:5: cannot find symbol
symbol: class JpcapHandler
public class sample implements JpcapHandler {
^
sample.java:6: cannot find symbol
symbol : class Packet
location: class sample
public void handlePacket(Packet packet){
^
sample.java:11: cannot find symbol
symbol : variable Jpcap
location: class sample
String[] devices = Jpcap.getDeviceList();
^
sample.java:19: cannot find symbol
symbol : class Jpcap
location: class sample
Jpcap jpcap = Jpcap.openDevice(deviceName, 1028, false, 1);
^
sample.java:19: cannot find symbol
symbol : variable Jpcap
location: class sample
Jpcap jpcap = Jpcap.openDevice(deviceName, 1028, false, 1);
^

Help me please. Whats the problem in this code and tell me how to set classpath.

[r035198x]

hi
Please help me.i am developing a java pgm to capture network packets using jpcap.i downloded jpcap and wpcap dll files.
My pgm is:

import jpcap.JpcapHand ler;
import jpcap.Jpcap;
import jpcap.Packet;
public class sample implements JpcapHandler {
public void handlePacket(Pa cket packet){
System.out.prin tln(packet);
}
public static void main(String[] args) throws java.io.IOExcep tion{
String[] devices = Jpcap.getDevice List();
for (int i = 0; i < devices.length; i++) {
System.out.prin tln(devices);
}
String deviceName = devices[0];
Jpcap jpcap = Jpcap.openDevic e(deviceName, 1028, false, 1);
jpcap.loopPacke t(-1, new sample());
}
}
when i run this pgm i got the following errors.

C:\Program Files\Java\jre1 .5.0\bin>javac sample.java
sample.java:1: cannot find symbol
symbol : class JpcapHandler
location: package jpcap
import jpcap.JpcapHand ler;
^
sample.java:2: cannot find symbol
symbol : class Jpcap
location: package jpcap
import jpcap.Jpcap;
^
sample.java:3: cannot find symbol
symbol : class Packet
location: package jpcap
import jpcap.Packet;
^
sample.java:5: cannot find symbol
symbol: class JpcapHandler
public class sample implements JpcapHandler {
^
sample.java:6: cannot find symbol
symbol : class Packet
location: class sample
public void handlePacket(Pa cket packet){
^
sample.java:11: cannot find symbol
symbol : variable Jpcap
location: class sample
String[] devices = Jpcap.getDevice List();
^
sample.java:19: cannot find symbol
symbol : class Jpcap
location: class sample
Jpcap jpcap = Jpcap.openDevic e(deviceName, 1028, false, 1);
^
sample.java:19: cannot find symbol
symbol : variable Jpcap
location: class sample
Jpcap jpcap = Jpcap.openDevic e(deviceName, 1028, false, 1);
^

Help me please. Whats the problem in this code and tell me how to set classpath.

Have a look at

http://mindprod.com/jgloss/classpath.html