How to extend a loaded class or interface ?

[lucian1kr]

Hi, I'm having a lot of trouble with this program. I know how to load classes from a URL and use their methods, but I can't extend them (or implement them if we speak about interfaces). Any ideas if it is possible ?

What I want to do is to write a class that implements the interface I've loaded from the URL.

Below is the source code. The URL has "http" in my code, not "h t t p": but the forum wouldn't let my post it because it is a link.

I packed myInterface.class in a JAR file (myPackage.JAR) and load it from there.

myInterface.java

package myPackage;

public interface myInterface {

void doSomething();​

}

testClass.java

package test;

import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;

public class testClass {

public static void main(String []args) throws ClassNotFoundException{

try {

URL[] urlVector = {new URL("h t t p://localhost:8080/application/myPackage.jar")};
URLClassLoader loader = new URLClassLoader(urlVector);
loader.loadClass("myPackage.myInterface");​

} catch (MalformedURLException ex) {

ex.printStackTrace();​

}​

}​

}