Is it a path problem, or what is it?? Please...

Question

Hi every one! I am just trying to open a Serial Port
This is my code
package demo2;
* Titre :
* Description :
* Copyright : Copyright (c) 2002
* Soci�t� :
* @author
* @version 1.0
import java.io.*;
import java.util.*;
import javax.comm.*;
public class Alert
static CommPortIdentifier portId;
static Enumeration portList;
PrintStream out=null;
BufferedReader in=null;
SerialPort serialPort;
int n=0;
byte[] data=new byte[100];
public static void main(String[] args)
System.out.println("Main running OK");
Alert app=new Alert();
} // main
public Alert()
System.out.println("AlertClass OK");
portList=CommPortIdentifier.getPortIdentifiers();
if (portList==null)
System.out.println("No Port Found");
return;
}// if
System.out.println(portList.hasMoreElements());
System.out.println("Port List Avalaible:");
while (portList.hasMoreElements())
portId=(CommPortIdentifier)portList.nextElement();
System.out.println("Owner : "+portId.getCurrentOwner()
+"("+portId.isCurrentlyOwned()+")");
System.out.println("Port : "+portId.getName());
if (portId.getPortType()
==CommPortIdentifier.PORT_SERIAL)
if (portId.getName().equals("COM1"))
System.out.println("Opening Serial Port "+portId.getName());
try
serialPort=(SerialPort)
portId.open("Yeeehaaa!!!",2000);
out=new PrintStream
(serialPort.getOutputStream());
in=new BufferedReader(new InputStreamReader
(serialPort.getInputStream()));
serialPort.notifyOnDataAvailable(true);
serialPort.setSerialPortParams
(57600,SerialPort.DATABITS_8,SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);
out.println("ATZ");
in=new BufferedReader(new InputStreamReader
(serialPort.getInputStream()));
System.out.println("Received :"+in.readLine());
System.out.println("Received :"+in.readLine());
String jgf=in.readLine();
System.out.println("Real one"+jgf);
}// try
catch (Exception e)
System.err.println
("Alert : "+e);
}// catch
}// if
}// if
} // while
}// Alert
This is the results
C:\PROGRAM FILES\JDK1.3\bin\javaw -classpath "C:\Program Files\demo2\bak;C:\Program Files\jdk1.3\jre\lib\ext\comm.jar;C:\PROGRAM FILES\JDK1.3\demo\jfc\Java2D\Java2Demo.jar;C:\PROGRAM FILES\JDK1.3\jre\lib\i18n.jar;C:\PROGRAM FILES\JDK1.3\jre\lib\jaws.jar;C:\PROGRAM FILES\JDK1.3\jre\lib\rt.jar;C:\PROGRAM FILES\JDK1.3\jre\lib\sunrsasign.jar;C:\PROGRAM FILES\JDK1.3\lib\dt.jar;C:\PROGRAM FILES\JDK1.3\lib\tools.jar" demo2.Alert
Main running OK
AlertClass OK
false
Port List Avalaible:
No port List, nothing I've been here for 3 days... Badly need help!! please...

Answer 1

Hi, (here edo)
its� right now my prog. works good.
But what i have done? By following the instruction there was no success:
win32comm.dll put in <jdk>\bin\
javax.comm.properties put in <jdk>\jre\lib
comm.jar put in <jdk>\jre\lib\ext
I put the javax.comm.properties and comm.jar file into the folder where MyApplication is in it.
than:(change in the folder where your Application is)
-javac -classpath .;<jdk>\jre\lib\ext\comm.jar MyApplication.java
-java -cp .;comm.jar MyApplication
and TATA it works :)
First i think i have to tell my conditions:
WinNT 4.0 Sp 6
Jdk 1.3.0
Comm Package 2.0
(I think what also important is by this problem)
WinNT is on device C:\
JDK is on device D:\Programm\jdk...
and my prog. is on device e:\...
(i think the source of all my problems was this wide spreed stuff)
maybe there are some links in the classes of the javax.comm where do not match,
but i don't know (can somebody explain this?)
by the way can somebody tell me
what is the "java -cp ..." -cp option for?
And it is possible to read from the ParallelPort?
When i try it, this is the result:
E:\...\TEST>java -cp .;comm.jar KommParallel
java.io.IOException: Unsupported operation. Output only mode
at com.sun.comm.Win32ParallelPort.getInputStream(Win32ParallelPort.java:102)
at KommParallel.main(KommParallel.java:19)
Thnax by edo