Java Read COM port

</pre>java read the serial port technology <p></p><p>       1, rxtx  </p> <p>   http://rxtx.qbang.org/wiki/index.php/Download</p><pre code_snippet_id= "1674392" Snippet_file_name= "blog_20160506_2_2194645" name= "code" class= "java" >package Fpx.grs.aliexpress.com;import Java.io.ioexception;import Java.io.inputstream;import Java.util.enumeration;import Java.util.toomanylistenersexception;import Gnu.io.commportidentifier;import Gnu.io.portinuseexception;import Gnu.io.serialport;import Gnu.io.serialportevent;import Gnu.io.serialporteventlistener;import    Gnu.io.unsupportedcommoperationexception;public class Simpleread implements Runnable, Serialporteventlistener {    Static Commportidentifier Portid;    Static enumeration portlist;    InputStream InputStream;    SerialPort SerialPort;    Thread Readthread;        public static void Main (string[] args) {portlist = Commportidentifier.getportidentifiers (); while (portlist. hasMoreElements ()) {Portid = (commportidentifier) portlist.nextelement ();            if (portid.getporttype () = = commportidentifier.port_serial) {if (Portid.getname (). Equals ("COM4")) { if (Portid.getname (). Equals ("/dev/term/a")) {Simpleread reader = new Simplerea                D (); }}}} public Simpleread () {try {SerialPort = (serialPort) portid.open ("Simpl        Ereadapp ", 2000);        } catch (Portinuseexception e) {System.out.println (e);}        try {InputStream = Serialport.getinputstream ();    } catch (IOException e) {System.out.println (e);}    try {Serialport.addeventlistener (this);        } catch (Toomanylistenersexception e) {System.out.println (e);}        Serialport.notifyondataavailable (TRUE); try {serialport.setserialportparams (9600, Serialport.databits_8, Serialport.stop        Bits_1,        Serialport.parity_none);        } catch (Unsupportedcommoperationexception e) {System.out.println (e);}        Readthread = new Thread (this);    Readthread.start ();        } public void Run () {try {thread.sleep (20000);    } catch (Interruptedexception e) {System.out.println (e);} } public void Serialevent (Serialportevent event) {switch (Event.geteventtype ()) {case Serialportevent.bi : Case SerialPortEvent.OE:case SerialPortEvent.FE:case SerialPortEvent.PE:case Serialportev Ent. Cd:case SerialPortEvent.CTS:case SerialPortEvent.DSR:case SerialPortEvent.RI:case Serialpo        RtEvent.OUTPUT_BUFFER_EMPTY:break;            Case serialportevent.data_available:byte[] Readbuffer = new BYTE[20]; try {while (inputstream.available () > 0) {int numbytes = Inputstream.read (Readbuffe                R); } SYSTEM.OUt.print (New String (Readbuffer));            } catch (IOException e) {System.out.println (e);}        Break }    }}

2, Jserialcomm

No need to add DLL to the system on RXTX basis

Https://github.com/Fazecast/jSerialComm/wiki

3, JSSC

Google's DLLs that don't need to rely on the system

Https://code.google.com/archive/p/java-simple-serial-connector/downloads

Java Read COM port