Programmering af eksterne enheder

Kender du DOS, UNIX/LINUX  og/ellers Windows-kommandoer til serielle port, osv?  Hvis ja, kan
du bruge Java's system.out() funktioner til at kalde styresystemet...

på www.javasoft.com kan du finde en comm api, det er den du skal bruge

Her er det:
http://java.sun.com/products/javacomm/index.html

prof:
Det ville være totalt MEGET dumt at bruge out() til det.
Java er platformsuafhængigt, udnytter man sådanne en ting som du foreslår går at det går af fløjten.

Der findes en mere elegant suport af serielleporten, men du skal naturligvis have den relevante java lib:
                           
Java gets serial support with the                                      javax.comm package

                       
Sun's JavaSoft division provides support for RS-232 and parallel devices with standard extensions

                         
Summary
                         
One of the most popular interfaces on a PC is the serial port. This interface allows computers to  perform input and output with peripheral devices. Serial interfaces exist for devices such as                  modems, printers, bar code scanners, smart card readers, PDA interfaces, and so on. Sun's JavaSoft division recently has made available the javax.comm package to add serial support to                          Java. This package provides support for serial and parallel devices using traditional Java semantics such as streams and events. In order to communicate with a serial device using a serial port on a  host computer from a Java application or applet, an interface is required. This API allows you to transmit and receive data from external devices connected to your serial port. In addition, the API provides a complete set of options for setting all of the parameters associated with serial and        parallel devices. This article focuses on how to use javax.comm to communicate with a serial device based on RS-232; discusses what the javax.comm API does and does not provide; and offers a small              example program that shows you how to communicate to the serial port using this API. We will end with a brief discussion of how this API will work with other device drivers, and also go over the                          requirements for performing a native port of this API to a specific OS. (2,700 words)                     
By Shivaram H. Mysore and Rinaldo Di Giorgio

p.s. hvis du er interesseret i elearning/multimedia/online undervisning i fysik og elektronik, stil gerne flere spørgsmål om det!!--det er også en af mine interesser...