classloader

问题 I'm really newbie to groovy scripting but following some tutorial I tried to dynamically load some groovy class within my java code using parseClass() method of GroovyClassLoader . I wrote some snippet and it worked fine for me. The problem is that I don't clearly understand what groovy engine is doing beyond my view and how those scripts are compiled? Does a new class gets creted and loaded into jvm? Or does my application uses some cached sources? Here is the class I'm trying to parse:

问题 I'm really newbie to groovy scripting but following some tutorial I tried to dynamically load some groovy class within my java code using parseClass() method of GroovyClassLoader . I wrote some snippet and it worked fine for me. The problem is that I don't clearly understand what groovy engine is doing beyond my view and how those scripts are compiled? Does a new class gets creted and loaded into jvm? Or does my application uses some cached sources? Here is the class I'm trying to parse:

问题 I'm trying to load a class from JAR represented as a byte[] array at runtime. I know two things about class to load: 1. it implements "RequiredInterface" 2. I know it's qualified name: "sample.TestJarLoadingClass" I found the solution in which I have to extend ClassLoader but it throws: Exception in thread "main" java.lang.ClassNotFoundException: sample.TestJarLoadingClass at java.lang.ClassLoader.findClass(ClassLoader.java:530) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java

问题 On a WAS 7, I deployed my EAR with a single WAR in it. The EAR classloading mode is set to PARENT_LAST , and the WAR classloading mode is also set to PARENT_LAST . The WAR's /WEB-INF/lib has the Mojarra JSF 2 RI, and the Unified EL 2.1 jars. Despite all this, when the application starts, it tries to load some MyFaces stuff, from the inbuilt MyFaces 1.2. The class loader viewer for the WAR class loader clearly shows "org.apache.myfaces.webapp.StartupServletContextListener" getting loaded at

问题 I have a php script needing Zend classes. It can be run in a browser, but errors occur when run the script by command lines in command prompt. require_once 'Zend/Loader.php'; // It can work in a browser but failed by command lines I also tried: require_once 'C:\wamp\www\zf_project\library\Zend\Loader.php'; and ini_set('include_path', ini_get('include_path') . PATH_SEPARATOR . dirname(__FILE__). DIRECTORY_SEPARATOR. 'library'); But failed. Then I need to load the class: Zend_Loader::loadClass(

问题 I am implementing a service which uses a URLClassloader to load classes dynamically. In the interest of security I would like to restrict the access of loaded classes. eg no network, file or db access etc. Anybody got any good resources or tutorials on the web for this kind of thing? 回答1: Google for "JavaSeal". But they didn't publish the code though. 回答2: http://java.sun.com/developer/technicalArticles/Networking/classloaders/ might be useful 来源： https://stackoverflow.com/questions/1791060

问题 I am trying to implement a method that when called, get a string from a particular resource in the jar that the class is loaded from. For example: import mypath.myclass; //from a jar String result = gitid.getGitId(myclass.class); On the backed I am currently using: InputStream is = null; BufferedReader br = null; String line; is = c.getResourceAsStream("/com/file.text"); The problem is I keep getting the same resource for no matter what class I give it. I have also tried: is = c

问题 I have a web application (war file) that works perfectly on tomcat. Now I need to put this same application to work on JBoss 4.2.2. There are other application running on the same JBoss instance. The problem is when I try to deploy the war application on JBoss. This is the exception I'm getting: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postmanTask' defined in file [/Users/lorenooliveira/dev/jboss-4.2.2.GA/server/default/./tmp/deploy

问题 Followup question from this one: Swing font names do not match? (Making a font chooser, and am trying to display the default system font in a JComboBox) It appears there are logical and physical fonts. The logical fonts are: Serif, SansSerif, Monospaced, Dialog, and DialogInput. These fonts are dynamic, and their respective physical font (the font that they will represent during program execution) are decided when the program loads. I need to access the physical font of these logical fonts.

问题 Understanding about loading a class and calling static initializer In what order do static initializer blocks So, I just tried to confirm it - public class OOMErrorB extends OOMErrorA { public static int c = 10; static { System.out.println("Loading static B " + c); System.out.println(OOMErrorA.a); } public static void main(String[] args) { new OOMErrorB(); } } The parent class is - public class OOMErrorA { public static int a = 20; static { a = a+ OOMErrorB.c; System.out.println("OOMErrorB.c