Java Tutorial/Development/CommPortIdentifier

Port Finder

   <source lang="java">

import java.io.*; import javax.rum.*; import java.util.*; public class Main {

   public static void main(String[] args)
   {
       Enumeration ports = CommPortIdentifier.getPortIdentifiers();
       
       while(ports.hasMoreElements())
       {
           CommPortIdentifier cpi =
                          (CommPortIdentifier)ports.nextElement();
           System.out.println("Port " + cpi.getName());
       }
   }

}</source>

Port Reader

   <source lang="java">

import java.io.*; import javax.rum.*; import java.util.*; public class PortReader SerialPortEventListener {

 static Enumeration ports;
 static CommPortIdentifier pID;
 InputStream inStream;
 SerialPort serPort;
 public PortReader() throws Exception{
   serPort = (SerialPort) pID.open("PortReader", 2000);
   inStream = serPort.getInputStream();
   serPort.addEventListener(this);
   serPort.notifyOnDataAvailable(true);
   serPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
       SerialPort.PARITY_NONE);
 }
 public void serialEvent(SerialPortEvent event) {
   switch (event.getEventType()) {
   case SerialPortEvent.BI:
     System.out.println("SerialPortEvent.BI occurred");
   case SerialPortEvent.OE:
     System.out.println("SerialPortEvent.OE occurred");
   case SerialPortEvent.FE:
     System.out.println("SerialPortEvent.FE occurred");
   case SerialPortEvent.PE:
     System.out.println("SerialPortEvent.PE occurred");
   case SerialPortEvent.CD:
     System.out.println("SerialPortEvent.CD occurred");
   case SerialPortEvent.CTS:
     System.out.println("SerialPortEvent.CTS occurred");
   case SerialPortEvent.DSR:
     System.out.println("SerialPortEvent.DSR occurred");
   case SerialPortEvent.RI:
     System.out.println("SerialPortEvent.RI occurred");
   case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
     System.out.println("SerialPortEvent.OUTPUT_BUFFER_EMPTY occurred");
     break;
   case SerialPortEvent.DATA_AVAILABLE:
     System.out.println("SerialPortEvent.DATA_AVAILABLE occurred");
     byte[] readBuffer = new byte[20];
     try {
       while (inStream.available() > 0) {
         int numBytes = inStream.read(readBuffer);
       }
       System.out.print(new String(readBuffer));
     } catch (IOException ioe) {
       System.out.println("Exception " + ioe);
     }
     break;
   }
 }
 public static void main(String[] args) throws Exception{
   ports = CommPortIdentifier.getPortIdentifiers();
   while (ports.hasMoreElements()) {
     pID = (CommPortIdentifier) ports.nextElement();
     System.out.println("Port " + pID.getName());
     if (pID.getPortType() == CommPortIdentifier.PORT_SERIAL) {
       if (pID.getName().equals("COM1")) {
         PortReader pReader = new PortReader();
         System.out.println("COM1 found");
       }
     }
   }
 }

}</source>

Port Sniffer

   <source lang="java">

import java.io.*; import javax.rum.*; import java.util.*; public class PortSniffer SerialPortEventListener {

   static Enumeration ports;
   static CommPortIdentifier pID;
   InputStream inStream;
   SerialPort serPort;
   
   public PortSniffer() throws Exception
   {
       serPort = (SerialPort)pID.open("PortSniffer",2000);
       inStream = serPort.getInputStream();
       serPort.addEventListener(this);
       
       serPort.notifyOnDataAvailable(true);
       serPort.notifyOnBreakInterrupt(true);
       serPort.notifyOnCarrierDetect(true);
       serPort.notifyOnCTS(true);
       serPort.notifyOnDataAvailable(true);
       serPort.notifyOnDSR(true);
       serPort.notifyOnFramingError(true);
       serPort.notifyOnOutputEmpty(true);
       serPort.notifyOnOverrunError(true);
       serPort.notifyOnParityError(true);
       serPort.notifyOnRingIndicator(true);
       
       serPort.setSerialPortParams(9600, SerialPort.DATABITS_8,
       SerialPort.STOPBITS_1,
       SerialPort.PARITY_NONE);
   }    
   public void serialEvent(SerialPortEvent event)
   {
       switch(event.getEventType())
       {
           case SerialPortEvent.BI:
               System.out.println("SerialPortEvent.BI occurred");
           case SerialPortEvent.OE:
               System.out.println("SerialPortEvent.OE occurred");
           case SerialPortEvent.FE:
               System.out.println("SerialPortEvent.FE occurred");
           case SerialPortEvent.PE:
               System.out.println("SerialPortEvent.PE occurred");
           case SerialPortEvent.CD:
               System.out.println("SerialPortEvent.CD occurred");
           case SerialPortEvent.CTS:
               System.out.println("SerialPortEvent.CTS occurred");
           case SerialPortEvent.DSR:
               System.out.println("SerialPortEvent.DSR occurred");
           case SerialPortEvent.RI:
               System.out.println("SerialPortEvent.RI occurred");
           case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
               System.out.println("SerialPortEvent.OUTPUT_BUFFER_EMPTY occurred");
               break;
           case SerialPortEvent.DATA_AVAILABLE:
               System.out.println("SerialPortEvent.DATA_AVAILABLE occurred");
               byte[] readBuffer = new byte[20];
               
               try
               {
                   while (inStream.available() > 0)
                   {
                       int numBytes = inStream.read(readBuffer);
                   }
                   System.out.print(new String(readBuffer));
                }catch (IOException ioe)
               {
                   System.out.println("Exception " + ioe);
               }
               break;
       }
   }
   
   public static void main(String[] args)throws Exception{
       ports = CommPortIdentifier.getPortIdentifiers();
       
       while(ports.hasMoreElements())
       {
           pID = (CommPortIdentifier)ports.nextElement();
           System.out.println("Port " + pID.getName());
           
           if (pID.getPortType() == CommPortIdentifier.PORT_SERIAL)
           {
               if (pID.getName().equals("COM1"))
               {
                   PortSniffer pSniffer = new PortSniffer();
                   System.out.println("COM1 found");
               }
           }
       }
   }

}</source>

Port Writer

   <source lang="java">

import java.io.*; import javax.rum.*; import java.util.*; public class PortWriter {

   static Enumeration ports;
   static CommPortIdentifier pID;
   static OutputStream outStream;
   SerialPort serPort;
   static String messageToSend = "message!\n";
   
   public PortWriter() throws Exception{
       serPort = (SerialPort)pID.open("PortWriter",2000);
       outStream = serPort.getOutputStream();
       serPort.setSerialPortParams(9600, SerialPort.DATABITS_8,
       SerialPort.STOPBITS_1,
       SerialPort.PARITY_NONE);
   }    
   
   public static void main(String[] args) throws Exception{
       ports = CommPortIdentifier.getPortIdentifiers();
       
       while(ports.hasMoreElements())
       {
           pID = (CommPortIdentifier)ports.nextElement();
           System.out.println("Port " + pID.getName());
           
           if (pID.getPortType() == CommPortIdentifier.PORT_SERIAL)
           {
               if (pID.getName().equals("COM1"))
               {
                   PortWriter pWriter = new PortWriter();
                   System.out.println("COM1 found");
               }
           }
       }
       outStream.write(messageToSend.getBytes());
   }

}</source>