Package - Javax Comm

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

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

Oracle/Sun dropped support for the original JavaComm API years ago, making it hard to find official downloads.

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

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

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