classloader

I have a java web start application and i need to disable bytecode verification from within the jnlp file. This can be done easily by setting JAVAWS_VM_ARGS=" -noverify " or by setting -Xverify:none but the documentation here says that web start does not support adding these arguments in jnlp file . I tried this : <j2se version="1.6+" java-vm-args="-noverify -showversion -verbose" > under resources tag but it skips -noverify and takes the other two. Any help is appreciated. ... but the documentation here says that web start does not support adding these arguments in jnlp file. And rightly so,

I'm using JDK 1.6 to run a small application. However I set a very massive classpath which includes a lot of classes. When I run the application will all classes in the classloader been loaded even if they're not actually used in my application? If not, how to force the classloader do so, and if yes, how to avoid it? Thanks! E.g.,I'm using ant 1.7 to run my application. Best Regards, Robert Ji No, The ClassLoader loads the class when the class is needed in memory. It doesn't load all classes at once as it can run out of memory. They are loaded when needed. But what "when needed" means, might

I have some problem with my JSystem/Java/Eclipse enviromment. I get this error and i don't understand what is wrong: java.lang.LinkageError: loader constraint violation: loader (instance of jsystem/runner/loader/ExtendsTestCaseClassLoader) previously initiated loading for a different type with name "org/w3c/dom/Document" I would like know if someone have had a similar issues, I don't think my enviromment is very important for solve it, if I will understand what's happened "undergound" I hope to solve problem myself. Thanks a lot in advance. I think this happened for me when I included a

I've created my own URLClassLoader , and set it as the system classloader via java.system.class.loader . It's initialized and everything, but the classes I'm trying to load aren't found. Here's the URLClassLoader : public class LibraryLoader extends URLClassLoader { public LibraryLoader(ClassLoader classLoader) { super(new URL[0], classLoader); } synchronized public void addJarToClasspath(String jarName) throws MalformedURLException, ClassNotFoundException { File filePath = new File(jarName); URI uriPath = filePath.toURI(); URL urlPath = uriPath.toURL(); System.out.println(filePath.exists());

I'm currently "rearranging" my Java EE application, which consists of three components: MyAppInterface: mostly JPA- and JAXB-annotated POJOs, also some EJB Local Interfaces MyAppServer: JPA Facades, EJBs, Jersey resources MyAppWeb: GWT frontend, communicates with MyAppServer via HTTP/REST via loadbalancer Both MyAppServer and MyAppWeb use the classes defined in MyAppInterface; MyAppServer "exports" some of its EJBs via local interfaces in MyAppInterface. MyAppInterface is kind of the API, it's what you need to work with MyAppServer. In Maven I am packaging MyAppInterface as jar , both

I have spend whole day on this problem. My problem is how to make an MethodHandle.invokeExact invocation on an instance, whose class type is dynamically loaded at program runtime. To make problem more clear, i show my sample code below: Class<?> expClass = new MyClassLoader().load(....) //expClass is AddSample.class which is subclass of BaseTemplate BaseTemplate obj = expClass.getConstructor(...) .newInstance(...); MethodHandle myMH = MethodHandles.lookup().findVirtual(expClass, methodName,..); System.out.println("Object type "+obj.getClass()); //Print AddSample // If obj is declared as

My problem is one that you would think is quite common, but I haven't so far managed to find a solution. Building a Java web app under Tomcat 5.5 (although a requirement is that it can be deployed anywhere, like under a WebLogic environment, hence the loading resources as streams requirement). Good practice dictates that resource files are placed under WEB-INF/classes and loaded using the ClassLoader's getResourceAsStream() method. All well and good when you know the name of the resource you want to load. My problem is that I need to load everything (including recursively in non-empty sub

Our commercial application used to run on different application server and letely we started adjust it to run on JBoss server. The problem is that that application runs JBoss cache and as part of the integration with this framework, the web-inf\lib contains the follwing jars: jboss-aop.jar, jbosscache-core.jar, jboss-common.jar, jboss-common-core.jar, jboss-j2ee.jar, jboss-jmx.jar, jboss-logging-spi.jar This causes a problem to use JNDI through the application because the jboss-common-core.jar contain naming package that cause JBoss JNDI to work incorrect. So I need to find a way to organise