[SNMP4J] for help ---how to get information about vlan with snmp4j

[scb]

at CISCO site,I kown how to useCommunity String Indexing with SNMP. with net-snmp ,just do that:
snmpwalk -cpublic at 1 crumpy .1.3.6.1.2.1.17.4.3.1.1snmpwalk -cpublic at 602 crumpy .1.3.6.1.2.1.17.4.3.1.1
then I can get information about vlan 1 and vlan 602,
but i don't kown how to get the same information by using snmp4j
thanks:
scb520