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Questions tagged [urlclassloader]

This class loader is used to load classes and resources from a search path of URLs referring to both JAR files and directories.

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URLClassLoader working on Java but not in Android

My URLClassLoader implementation seems to only work on pc, but not on Android. try { Class loadedClass = new URLClassLoader( new URL[] { new File("http://10.0.2.2/myphpfile.php").toURI().toURL() }) …
Marian Klühspies
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How can I create memory sandbox for objects using ClassLoaders in Scala?

I am trying to create a dynamically-loaded set of Scala classes (and objects), held in a 'sandbox' by a ClassLoader (all memory, resources, threads, etc. held within the sandbox). When refreshed, I want all memory/static objects held in the class…
Greg
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How to load all the jars from a directory dynamically?

Hi I am creating a plugin which requires loading jars dynamically and accessing the classes and methods of these jars. I tried using URLClassLoader and am able to load the classes as shown below URL myJarFile = new…
Yunkhan
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Java keeping jar in use by jarclassloader/urlclassloader

I am loading a jar file with a JarClassLoader. After the jar file is loaded, I want to delete the file. Everything works fine except for deleting the file because the file is kept in use by the Java jvm. How do I unlock the jar? I am already closing…
Ridz
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Load class within Jar file and get it's path

I know there are already a lot similar questions here, but I couldn't get any smarter form them. I want to load a class inside a jar file, at this point this is no problem, but when I want to pass the path to my own ClassLoader it throws an…
domizai
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Class not available after using ClassLoader

If I load a class from file at runtime using a URLClassLoader: ClassLoader classLoader = new URLClassLoader(new URL[] { classesUrl }, getClass().getClassLoader()); String name = fileName.replace("\\", ".").replace("/", ".").substring(0,…
Robert
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URLClassLoader not able to Load dependencies on Linux

I am using URLClassLoader for loading classes. Though the name of the file which i pass is loaded successfully but for classes which it referes to, NoClassDefFoundError is thrown for those. Both the classes are part of different jar files. Even…
Bagira
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Error when load JAR file classes at run time

I am trying to add JAR file to class path and load all classes from JAR file at run time. here is the code I wrote for this task (This class extends URLClassLoader) public void loadJar(final String fName) throws IOException, IllegalAccessException,…
Korben
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How would I fix this classloader issue?

Let me start off by saying I'm not the best at Java so I may have missed something really simple... I'm working on a plugin system and everything works perfectly fine in eclipse but not when I actually launch the applet outside of it. I'm trying to…
user1728017
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URLClassLoader can't find classes

I want to use an URLClassLoader to load classes in a particular directory from a jar-archive. The project structure is as follows / application.jar /lib/ mysql.jar log4j.jar ... /myClasses/ class1.class class2.class ... The jar has…
F.P
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Java JAR protection

I've coded a Java app and I plan to distribute it online. Each release will be locked with a secret serial key I made. I need to secure my jar file from decompiler etc. Here is what I've done so far: User enters his serial key into a form The…
Manitoba
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Does URLClassLoader.addURL(URL) honor the META-INF/MANIFEST.MF

If I have a jar that includes a Class-Path entry in the MANIFEST.MF. If I add the jar to a URLClassLoader, are the jars in the Class-Path entry also added to the classloader? Do I need to introspect the jars that I want to add to the classloader to…
vkraemer
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Loading .jars during runtime: my loader works, but using setContextClassLoader doesn't?

I have an URLClassLoader named "MyClassLoader" set up with some jars on it. If I try MyClassLoader.loadClass("MyClass"); it works. If I…
John Without Arms
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Using defineClass to Dynamically Create Class from Bytes

It seems like I should be able to do this with a class loader derived from URLClassLoader that includes a loadClass(): public Class loadClass(String className, byte[] classBytes) throws ClassNotFoundException, NoClassDefFoundError { Class result…
user186668
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How exactly does URLClassLoader work? java

So I know how to use URLClassLoader, and I know what it does, what I want to know is how exactly does it do it. Basically I'm asking: Is it a live stream? Or does it do a temporary download and reads the classes locally? So if you where continually…
Travis
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