How to determine absolute path (if any) of a loaded Class?

问题

Is there a (compatible, if possible) way to determine the absolute path of a loaded Class?

Of course, this is not always possible (if you think of dynamically created classes), but if the loaded Class is inside a jar how to get the absolute path for this jar?

回答1:

MyClass.class.getProtectionDomain().getCodeSource().getLocation().getPath()  

Fullcode:

    package org.life.java.so.questions;
   /**
     *
     * @author jigar
     */
    public class GetClassPath {
        public static void main(String[] args) {
            System.out.println(GetClassPath.class.getProtectionDomain().getCodeSource().getLocation().getPath());      
        }
    }

Output:

/C:/Documents%20and%20Settings/argus/My%20Documents/NetBeansProjects/temp/build/classes/

Or

ClassLoader loader = GetClassPath.class.getClassLoader();
System.out.println(loader.getResource("org/life/java/so/questions/GetClassPath.class"));

回答2:

Try something like this:

SomeClass.class.getResource("/" + SomeClass.class.getName() + ".class").toString();

If the class is loaded from jar the result should be something like:

jar://myjar.jar!path/to/SomeClass.class

来源：https://stackoverflow.com/questions/4546632/how-to-determine-absolute-path-if-any-of-a-loaded-class