The following code adds jar file to the build path, it works fine with Java 8. However, it throws exception with Java 9, the exception is related to the cast to URLClassLoader. Any ideas how this c...

After installing jdk9 I have been seeing this problem: $hive Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option MaxPermSize; support was removed in 8.0 SLF4J: Class path contains multiple ...

I need to add plugin functionality to an existing application for certain parts of the application. I want to be able to add a jar at runtime and the application should be able to load a class from...

I am moving my code from JDK 8 to Open JDK 12. While doing so, I am facing following issue : java.lang.NoSuchFieldException: scl while trying to call ClassLoader.class.getDeclaredField("scl")....

How can I dynamically load a jar file and list classes which is in it?

Until java9 for adding external jar to classpath in runtime by programmatically everybody used: URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader(); Method method = URLC...

I've got a classloader problem with Java 9. This code worked with previous Java versions: private static void addNewURL(URL u) throws IOException { final Class[] newParameters = new Class[]{U...

Have been trying this since few days and can't get it working! I am trying to build a pluggable java application where I can run it from command line and provide plugins (jars) in a separated fold...

static boolean isClassLoaded(String fullname) { try { Class.forName(fullname, false, Loader.instance().getModClassLoader()); return true; } catch (Exception e) { return false; } } does this...

I have a case where I need to create a lot of class loaders in my application to temporarily make some code visible while user supplied scripts are running. I'm using an URLClassLoader for this and...

We're looking for an alternative to Java web start that effectively does the same thing, just better implemented. We're having massive trouble with it. We have a few offices of XP desktops, a...

We're currently investigating the use of OneJar in our application (for a number reasons), but our application makes use of a number of custom URLClassloaders to load application extensions. When ...

I was playing around with classLoaders in Java and noticed a strange thing. If a classLoader loads a class from a jar, this jar is locked indefinitely even if you unreference your classLoader. In ...

UPDATE: I think the issue may be caused by the fact that the TestFramework.jar depends on JUnit and somehow is not finding the junit jar when it (TestFramework) loads. Still not sure on a solution,...

I have small problem. I learn java SE and find class ClassLoader. I try to use it in below code: I am trying to use URLClassLoader to dynamically load a class at runtime. URLClassLoader urlcl = ne...

Question summary: How do I modify the code below so that untrusted, dynamically-loaded code runs in a security sandbox while the rest of the application remains unrestricted? Why doesn't URLClassLo...

On Eclipse Galileo, got the following ClassNotFoundException when doing Debug As/Web Application. But works just fine when doing Run As/Web Application. I was given message that "The source attach...

java -classpath ../classes;../jar;. parserTester How can i get the functionality in the above command programmatically? Like, is it possible to run as: java parserTester and get the same resul...

I am using a custom class loader which extends URLClassLoader. I load some classes into my custom class loader and perform some task. Once the task is completed i want to dispose of the class loade...