Java APIs

how to solve this error:

this is my code for snmpwalk :

package snmp;

import java.io.IOException;

import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.Null;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class SNMPWalk
{
//
// Command line format:
// java SNMPWalk targetAddress targetOID
// EX:
// java SNMPWalk 192.168.76.15/161 1.3.6.1.4.1.517
//
public static void main(String[] args)
{
Address targetAddress = new UdpAddress("localhost/161");
OID targetOID = new OID("1.3.6.1.2.1.1.1.0");
// OID targetOID = new OID("1.3.6.1.4.1.517");


PDU requestPDU = new PDU();
requestPDU.add(new VariableBinding(targetOID));
//requestPDU.setType(PDU.GETNEXT);
requestPDU.setType(PDU.GETNEXT);


CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString("demopublic"));
target.setAddress(targetAddress);
target.setVersion(SnmpConstants.version2c);

try
{
TransportMapping transport = new DefaultUdpTransportMapping();
Snmp snmp = new Snmp(transport);
transport.listen();

boolean finished = false;

while (!finished)
{
VariableBinding vb = null;

//line 57 PDU responsePDU = snmp.sendPDU(requestPDU, target);
if (responsePDU != null)
{
vb = responsePDU.get(0);
}

if (responsePDU == null)
{
System.out.println("responsePDU == null");
finished = true;
}
else if (responsePDU.getErrorStatus() != 0)
{
System.out.println("responsePDU.getErrorStatus() != 0");
System.out.println(responsePDU.getErrorStatusText());
finished = true;
}
else if (vb.getOid() == null)
{
System.out.println("vb.getOid() == null");
finished = true;
}
else if (vb.getOid().size() < targetOID.size())
{
System.out.println("vb.getOid().size() < targetOID.size()");
finished = true;
}
else if (targetOID.leftMostCompare(targetOID.size(),
vb.getOid()) != 0)
{
System.out.println("targetOID.leftMostCompare() != 0)");
finished = true;
}
else if (Null.isExceptionSyntax(vb.getVariable().getSyntax()))
{
System.out.println(
"Null.isExceptionSyntax(vb.getVariable().getSyntax())");
finished = true;
}
else if (vb.getOid().compareTo(targetOID) <= 0)
{
System.out.println("Variable received is not "+
"lexicographic successor of requested "+
"one:");
System.out.println(vb.toString() + " <= "+targetOID);
finished = true;

}
else
{
// Dump response.
System.out.println(vb.toString());

// Set up the variable binding for the next entry.
requestPDU.setRequestID(new Integer32(0));
requestPDU.set(0, vb);
}
}

snmp.close();

}
catch (IOException e)
{
System.out.println("IOException: "+e);
}

}

}


line no. 57 as i have indicated.

the error say: the method sendPDU is undefined for the type snmp

i have included snmp4j.jar file.

or atleast can i get snmpwalk example for java to test on eclipse