Arch Linux

Bobonov

Member

From: Roma - Italy

Registered: 2003-05-07

Posts: 295

Java Blackdown $CLASSPATH

I am trying to execute a java programm but each time I get the following error

Exception in thread "main" java.lang.NoClassDefFoundError: jgnash_1_5/jar

Normaly it is due to a classpath incorreclty set (in fact it was not set). I am trying to find were are the classes under /opt/j2sdk but without succes.

Any suggestion???

Arielext

Member

From: Amersfoort, the Netherlands

Registered: 2002-08-12

Posts: 362

Website

Re: Java Blackdown $CLASSPATH

/opt/j2sdk/jre/lib

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apt-get install arch

Bobonov

Member

From: Roma - Italy

Registered: 2003-05-07

Posts: 295

Re: Java Blackdown $CLASSPATH

The error is still there.

basically I tried to configure the classpath in /etc/profile (I think is the most logical place)  as follow

export JAVA_HOME="/opt/j2sdk"
export CLASSPATH="$JAVA_HOME/jre/lib"

export PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin:/opt/bin"
export PATH="$JAVA_HOME/bin:$PATH"

Unfortunatly the error is still there.

neri

Forum Fellow

From: Victoria, Canada

Registered: 2003-05-04

Posts: 553

Re: Java Blackdown $CLASSPATH

Hi Bonobov,

basically I tried to configure the classpath in /etc/profile (I think is the most logical place)  as follow

export JAVA_HOME="/opt/j2sdk"
export CLASSPATH="$JAVA_HOME/jre/lib"

export PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin:/opt/bin"
export PATH="$JAVA_HOME/bin:$PATH"

Unfortunatly the error is still there.

Two things:
You dont need to put everything into /etc/profile. Each shellscript (read
*.sh) in the directory /etc/profile.d will be parsed and executed. There should
be a file j2sdk.sh
You can make your modifications there.
Secondly, try to point your Classpath to the rt.jar file in /opt/j2sdk/jre/lib.
Maybe this will help.

bye neri

hApy

Member

From: Victoria, BC

Registered: 2003-04-13

Posts: 194

Website

Re: Java Blackdown $CLASSPATH

hmmm.. my classpath is:

CLASSPATH=".:/opt/j2sdk"

try that.

Hapy.

sarah31

Member

From: Middle of Canada

Registered: 2002-08-20

Posts: 2,975

Website

Re: Java Blackdown $CLASSPATH

hopefully i fixed this last night. please upgrade to j2sdk-1.4.1-5 and let me know if it is working for you now. (sorry but i now less than nothing about using java (other than knowing it is a resource hog))

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AKA uknowme

I am not your friend

Bobonov

Member

From: Roma - Italy

Registered: 2003-05-07

Posts: 295

Re: Java Blackdown $CLASSPATH

Sometime when you look for the origin of a problem you look too far from the problem itself, so after a couple of day of frustration you discover that it was just a question of a stupid parameter.
Basically I was doing the following:

java jgnash_1_6.jar

Unfortunatly java does not understand that a filename.jar is a jar file, so if you have an error like mine running a jar file try first:

java -jar jgnash_1_6.jar

Note:
Just for test I tried to unset $CLASSPATH and run the program again and it is working, so it seem that java "guess" the class location by the position of the java/javac executable