Re: [eclipse-clp-users] java.lang.NumberFormatException

From: Kish Shen <kisshen_at_...5...>
Date: Fri, 11 Feb 2011 12:48:45 +0000
On 11/02/2011 11:09, Joris Van den Broeck wrote:
> Hi,
>
> When I use the Java/ECLiPSe interface, I get
> a java.lang.NumberFormatException
>
> java.lang.NumberFormatException: null
> java.lang.NumberFormatException: null
> at java.lang.Integer.parseInt(Integer.java:443)
> at java.lang.Integer.parseInt(Integer.java:514)
> at
> com.parctechnologies.eclipse.OutOfProcessEclipse.<init>(OutOfProcessEclipse.java:82)
>
> OutOfProcessEclipse.java
>
>      // Read the port number from the eclipseProcess' stdout
>      String portString = eclipseProcessStdout.readLine();
>
>      // Read the password from the eclipseProcess' stdout
>      String passwd = eclipseProcessStdout.readLine();
>
>      // make port string into an int
>      int port = Integer.parseInt(portString);
>
>
> The java program I'm trying to run came with a windows version of ECLiPSe, I
> changed that to the linux version (I'm using ubuntu) and it worked as it was
> supposed to 2 days ago but now it suddenly throws an error. (while I didn't
> changed anything to the code) Has anyone an idea what might be wrong?
>

Hi Joris,

I am not that familiar with the Java interface, but the problem you are 
seeing is most likely because your Java program failed to start the 
ECLiPSe process -- in OutOfProcessEclipse, Java should start a new 
ECLiPSe, running as an separate process, and Java then establish 
communication with it -- the error you are seeing is showing that Java 
is not able to read the expected data from the ECLiPSe process, and the 
most likely reason is because the ECLiPSe process did not start correctly.

This is obviously the problem when you tried to run the Windows version 
of ECLiPSe under Linux.

Are you seeing the same error with your current problem? If you are, 
then try and figure out why Java might be unable to run ECLiPSe -- did 
you change anything in your environment?

Cheers,

Kish

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Received on Fri Feb 11 2011 - 12:48:53 CET

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