Jar file vs classes

Question

Hi,
i am encountering a strange problem.
I am trying to run quartz (java application) on oc4j server.
When i have all the quartz classes in web-inf/classes folder, the application runs fine, but the moment i make a jar out of all classes and put the jar file in web-inf/lib folder, the application gives me a null pointer exception saying it is not able to set properties from an external properties file.This properties file is located in web-inf/classes folder.
Any help on sorting this out is welcome.
Regards
Ashish

Answer 1

The are 2 possible ideas :
1. If processing your external properties file is not hardcoded in .jar, so point
classpath to the properties in META-INF/MANIFEST.MF file, example :
Class-Path: .
dot (.) point to the location WEB-INF/classes and you can test it easily with such code :
Properties config = new Properties() ;
InputStream is = getClass().getClassLoader().getResourceAsStream("config.properties") ;
if ( is == null ) {
System.err.println("Could not load config.properties") ;
} else {
config.load(is) ;
Manifest file could be easily generated using ant.
2. If it will not help, you should put your properties file inside .jar , but I suppose
first solution will rock.