Uses a Java event model to detect changes in signal lines (e.g., carrier detect). Review & Status (As of 2026)
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. Package Javax Comm
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
(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 Oracle/Sun dropped support for the original JavaComm API
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).
While it was once a stable and flexible solution for Java-to-hardware communication, javax.comm should be avoided for new projects . It is extremely difficult to set up on modern systems, and superior, actively maintained libraries are readily available.