Java Module jdk.jdi Package com.sun.jdi.connect.spi Class TransportService.ListenKey（JDK11）

A TransportService may listen on multiple, yet different, addresses at the same time. To uniquely identify each listener a listen key is created each time that startListening is called. The listen key is used in calls to the accept method to accept inbound connections to that listener. A listen key is valid until it is used as an argument to stopListening to stop the transport service from listening on an address.