Java comm api in 64-bit Linux

I apologise if this is off-topic. I can't find a suitable forum, I tried posting in the Java plugin forum, but no luck there. I would appreciate any ideas to find a solution.
I am trying to use the java comm api to read and write to the serial port but I am getting the following error:
Error loading LinuxSerialParallel: java.lang.UnsatisfiedLinkError: /usr/lib64/libLinuxSerialParallel.so: Can't load IA 32-bit .so on a AMD 64-bit platform
I am using openSUSE 10.2 (X86-64) which uses Linux 2.6.18.2-34-default x86_64.
I tried Switching to a 32-bit version of java (1.4.2) from within Eclipse and I always run Eclipse in 32-bit java (/usr/share/eclipse/eclipse -vm /usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre/bin/java) but I still get this error.
Is there anything I can do to get the java comm api working on a 64-bit system?
Is the java comm api still being developed and maintained? It does not look like it is?
I've done some searching on the web and I find there is an open source version of the java comm api called RXTX but the website at http://www.rxtx.org/ is not very readable. I don't think I know enough to install this on my system.
I would appreciate any ideas to get this working.
Thanks,
Martin

I'm stuck again so I would appreciate some more help.
I've managed to install the Sun 1.6 JDK and configure
and make rxtx.Any small amount of progress is still progress. :)
>
But it still does not work, I get the following error
when I run the SerialDemo:<snip>
>
It seems to be com.sun.comm which is not finding its
native binary not rxtx! No, it's finding the shared library, unless there are a few more lines at the start of your error message that look like this:
Error loading LinuxSerialParallel: java.lang.UnsatisfiedLinkError:
no LinuxSerialParallel in java.library.pathIt's not finding the function it is looking for in that library.
This is what confuses me, the
instructions say install the Solaris version of comm
api (http://www.rxtx.org/ how-to said Solaris Sparc
and the rxtx INSTALL file said Solaris x86 so I tried
both in turn and neither worked) Same here after downloading the latest stuff to my x86 Linux box. I received a similar UnsatisfiedLinkError. I checked the shared libraries and the functions were not in it.
normally these would
call the Solaris binary drivers but I assume this has
to be redirected to rxtx which calls its own
binaries?Yes. There is a part of RXTX called JCL (Java Comm for Linux) that handles that.
http://www.geeksville.com/~kevinh/linuxcomm.html
However, I think the problem is that Sun's API has changed since the RXTX How-To was written. Try downloading the 'comm.jar' at the bottom of the page. It says:
comm.jar, 2.0.3, generic, English (3rd party backward compatibility, only), EnglishUnzip it and copy the comm.jar file to the 'jre/lib/ext' folder of the JDK/JVM where everything else RXTX created was placed.
After doing this the SerialDemo app started for me without errors.
Jim S.

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and what does this error message mean??
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I show you the example of my code:
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import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
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}Before opening the port I call
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Good Luck!

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Hi all,
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Have you read any of these?
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import java.io.*;
import java.util.*;
import javax.comm.*;
import java.lang.*;
import java.Buff.*;
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     SerialPort serialPort;
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     catch (PortInUseException e)
                              System.out.println(e);
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     catch (IOException e)
                    System.out.println(e);
               try
serialPort.addEventListener(this);
               catch (TooManyListenersException e)
                    System.out.println(e);
     serialPort.notifyOnDataAvailable(true);
     try
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SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
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out = new OutputStreamWriter(serialPort.getOutputStream());
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out.flush();
out.write("ATQ0V1E0");
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int result ;
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case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
byte[] readBuffer = new byte[20];
try
while (inputStream.available() > 0)
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hi friends am getting these errors
C:\programs>javac SimpleRead.java
SimpleRead.java:115: illegal start of expression
public void run()
^
SimpleRead.java:159: ';' expected
^
2 errors
please help me....
its very urgent....this is the first program of mine.... am so tensed..
i should finish this soon... please help me...
this is my mail ID
[email protected]

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import java.io.*;
import java.util.*;
import javax.comm.*;
public class SimpleRead implements Runnable, SerialPortEventListener {
static CommPortIdentifier portId;
static Enumeration portList;
InputStream inputStream;
SerialPort serialPort;
Thread readThread;
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portId = (CommPortIdentifier) portList.nextElement();
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try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
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try {
Thread.sleep(20000);
} catch (InterruptedException e) {}
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case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
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byte[] readBuffer = new byte[20];
try {
while (inputStream.available() > 0) {
int numBytes = inputStream.read(readBuffer);
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Jess...

I actually got my scanner to work. I got my SimpleRead.java to work as an application. I set up this as an applet. Now my problem is that I the inputread reading from the serial port is not reading correct data always. It sometimes does scan correct data at times and other times it will not. So, I am not sure what is wrong. Does anyone have any clue why this could happen?

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I am having problems with this and have posted here:
java comm api in 64-bit Linux (second page... look for a post about the same time as this one)
Does anyone have a reliable howto for 64 bit Linux ?
Needless to say... annoyance that this is not in the core api is limitless.
Edited by: hamiljf on 06-Nov-2010 07:55

hamiljf wrote:
Needless to say... annoyance that this is not in the core api is limitless.I'm annoyed that we don't have Complex Primitives, Operator Overloading and World Peace in the core API but they ain't and are probably never going to be. If you are really annoyed then you could always switch to Mono and use System.IO.Ports . I can switch to use Mono for Operator Overloading but Mono does not have Complex Primitives or World Peace and I don't see them ever being implemented in Mono. I suppose I have to go back to FORTRAN and just forget World Peace. Bummer!

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MMN

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cheers
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