I'm baby in SNMP Application so I try to go step by step with example in this site but I found problem and can't go next step (ToT) help me please.

This is my code
*************************************
package adventnet;

import com.adventnet.snmp.beans.*;

public class Adventnet
{
public static void main(String[] args)
{
SnmpTarget target = new SnmpTarget();
target.setTargetHost("192.168.1.1");
target.setObjectID(".1.3.6.1.2.1.1.1.0");
System.out.println(target.snmpGet());
}
}
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when compile this class. Is it return NULL? if answer is no how i can do for right result.

thank you very much