classloader

I'm wondering if it's possible to get a handle on running instances of a given class. The particular issue that triggered this was an application that doesn't exit nicely because of a number of running threads. Yes, I know you can daemonize the theads, and they won't then hold up the application exit. But it did get me to wondering if this was possible. The closest thing I can is the classloaders (protected!) findLoadedClass , although you'd have to run through your own classloader to do this. On a related note, is this how profiling tools manage to track object handles? by running through

I'm reading on class loading in Java. Motivation Assuming we have a classloader hierarchy that looks like this, I understand that classes loaded by First are not directly accessible by classes loaded by Second (and vice versa). Bootstrap | System | Common / \ First Second I also understand that a classloader checks with its parent class loader whether it can load the class and, if that is the case, delegates the loading to its parent. Question How do classloaders actually determine whether they can load some given class? That differs depending on the implementation of the classloader. But all

I tried implementing my own class loader based on some examples. However, I think it is not working as expected ( unable to reload Jar file etc. I see few references of recommending using OSGI or Apache Felix for handling Jar file loading. Is there any examples of loading Jar, instancing a class from the Jar? More details on what I am trying to accomplish..I have a Java command line application that essentially continuously runs. I want it to be able to reference JAR files dynamically at runtime and at run-time instance a class in these jars. These jars may contain 1 or more supporting classes

I'm using Maven for desktop applycation. I read about Maven standart directory layout and I have this project structure for now: App |-- pom.xml `-- src |-- main |-- java | `-- java classes |-- resources | `-- images | `-- app images `--config `--config.xml I want to find a way to load my resources and config files. I read some articles and topics and found this (simplified example from my code): //class for loading config public class Preferences { public Preferences() { InputStream image = Preferences.class.getResourceAsStream("images/image.png"); InputStream config = Preferences.class