CommPortIdentifier (discovers and names ports like /dev/ttya or COM1 ) and CommPort (abstracts the port and manages InputStream / OutputStream ).
Enables communication with external hardware like modems, barcode scanners, and custom sensors. Package Javax Comm
It is not part of the standard JDK, requiring manual installation of comm.jar and platform-specific native libraries ( .dll or .so files). Oracle/Sun dropped support for the original JavaComm API
Oracle/Sun dropped support for the original JavaComm API years ago, making it hard to find official downloads. Uses a Java event model to detect changes in signal lines (e
The de facto standard replacement for many years was RXTX (e.g., org.rxtx:rxtxcomm ), but it is also considered old. Modern Java serial communication is typically handled via modern, maintained libraries like jSerialComm or jSSC (Java Simple Serial Connector).
Uses a Java event model to detect changes in signal lines (e.g., carrier detect). Review & Status (As of 2026)
