Thread: cant catch NoClassDefFoundError

Hi.
This is my code:

    try {
            final BasicService bs;
            final URL codeBase;
            try {
                bs = (BasicService) ServiceManager.lookup(
                        "javax.jnlp.BasicService");
                codeBase = bs.getCodeBase();
                System.out.println(codeBase);
            } catch (UnavailableServiceException ex) {
                Logger.getLogger(applet.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (Exception catchMe) {
        }

and i get:

java.lang.NoClassDefFoundError: javax/jnlp/UnavailableServiceException
Caused by: java.lang.ClassNotFoundException: javax.jnlp.UnavailableServiceException
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Exception in thread "main" Java Result: 1

I know that this code will only work when i lunch my app using JWS, but is there a way to catch the exception if i lunch my app using jar archiwe? I need this to find out if user is lunching my app localy (using jar archiwe) instead of lunching it through jnlp file.

Thank you very much for your time

Originally Posted by Norm

Can you make a small, complete program that compiles, executes and shows the problem? Including the jnlp file.

You probably misunderstand me. Everything is working correctly when i am lunching my app using JWS and i know that this is dedicated for this but i'm wondering if there is a way to catch the exception when i am running my app not using JWS (everything is building correctly i just get an exception when i run it).

Thanks