Package Javax Comm 〈RELIABLE〉

It is not part of the standard JDK, requiring manual installation of comm.jar and platform-specific native libraries ( .dll or .so files).

The package, often referred to as the Java Communications API or JavaComm, is a legacy API developed by Sun Microsystems to provide Java applications with low-level, asynchronous access to serial ( ) and parallel ports. Overview & Purpose Package Javax Comm

If you are working on a legacy system, I can provide tips on: Finding the libraries Troubleshooting the "No serial ports found" error It is not part of the standard JDK,

Uses a Java event model to detect changes in signal lines (e.g., carrier detect). Review & Status (As of 2026) Review & Status (As of 2026) It can

It can be notoriously difficult to configure, often requiring precise placement of javax.comm.properties . It has known limitations with 64-bit Windows and is not truly cross-platform without bundling separate native libraries for each target system.

CommPortIdentifier (discovers and names ports like /dev/ttya or COM1 ) and CommPort (abstracts the port and manages InputStream / OutputStream ).

(like jSerialComm) if you are starting a new project. What is your current goal with javax.comm ? Opening up new ports to Java with javax.comm - InfoWorld