PacketCapture is the core of the packet capture system provided by jpcap.

Applications wishing to capture network packets create an instance of PacketCapture and call its methods in order to open a network device, set packet filters and ultimately receive packet data from the network.

PacketCapture utilizes a publish/subscribe pattern to broadcast packets to all objects which have registered as listeners for events of interest. Applications capturing network data must implement PacketListener and register with an instance of the capture system in order to receive packets.