Serial interfacing requires a standardized API with platform-specific implementations, which is difficult for Java. Unfortunately, Sun doesn't pay much attention to serial communication in Java. Sun has defined a serial communication API, called JavaComm, but an implementation of the API is not part of the Java standard edition. Dec 29, 2017 In this tutorial, I demonstrate how to build up a serial connection between a Java Application and an Arduino Uno. The tutorial is divided into two parts: In the first part, it is explained how to send text (digits) from a Java Application to an Arduino.
marked as duplicate by Lawrence Dol, Kate Gregory, andrewsi, cmbuckley, MacNov 26 '12 at 21:00
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3 Answers
This question has been asked and answered many times:
to reference a few.
Personally I recommend SerialPort from http://serialio.com - it's not free, but it's well worth the developer (no royalties) licensing fee for any commercial project. Sadly, it is no longer royalty free to deploy, and SerialIO.com seems to have remade themselves as a hardware seller; I had to search for information on SerialPort.
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From personal experience, I strongly recommend against the Sun, IBM and RxTx implementations, all of which were unstable in 24/7 use. Refer to my answers on some of the aforementioned questions for details. To be perfectly fair, RxTx may have come a long way since I tried it, though the Sun and IBM implementations were essentially abandoned, even back then.
A newer free option that looks promising and may be worth trying is jSSC (Java Simple Serial Connector), as suggested by @Jodes comment.
The Java Communications API (also known as javax.comm) provides applications access to RS-232 hardware (serial ports): http://www.oracle.com/technetwork/java/index-jsp-141752.html