jpcap is a set of Java classes which provide an interface and system for network packet capture. A protocol library and tool for visualizing network traffic is included.
jpcap utilizes libpcap, a widely deployed system library for packet capture.
JavaIDMEF is an implementation of IDMEF in Java originally developed by Chris McCubbin. The Intrusion Detection Message Exchange Format (IDMEF) describes the structure and transport facility of information between IDS and management.