your not using Sun JDK.
Type 'which java' @ the prompt. This will show you where your java command lies. This should be taken from your JAVA_HOME.

Simply set JAVA_HOME variable & append $JAVA_HOME\bin to the beginning of your path variable.


On 2/19/07, venkatesh devalapura nagabhushana <venkatesh.nag@wipro.com> wrote:


After successfully compiling the example code FibnacciExample.java, I
tried to run it, I get the following error, let me know how to solve it:

java FibonacciExample
Exception in thread "main" java.lang.ExceptionInInitializerError
   at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0)
   at org.drools.semantics.java.RuleBuilder.<clinit>() (Unknown Source)
   at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0)
org.drools.compiler.PackageBuilder.addRule(org.drools.lang.descr.RuleDescr ) (Unknown Source)
org.drools.compiler.PackageBuilder.addPackage(org.drools.lang.descr.PackageDescr) (Unknown Source)
(Unknown Source)
   at FibonacciExample.main(java.lang.String[]) (Unknown Source)
   at gnu.java.lang.MainThread.call_main() (/usr/lib/libgcj.so.6.0.0)
   at gnu.java.lang.MainThread.run() (/usr/lib/libgcj.so.6.0.0)
Caused by: java.util.regex.PatternSyntaxException: At position 2 in
regular expression pattern:
expected end of character class
   at java.util.regex.Pattern.Pattern( java.lang.String, int)
   at java.util.regex.Pattern.compile(java.lang.String, int)
   at org.drools.semantics.java.KnowledgeHelperFixer.<clinit>() (Unknown
Source)   at java.lang.Class.initializeClass()
   ...8 more

Is it require to place .drl file in the same directory as that of the
source code ?


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