Help in source code

Question

This code generate the exception can someone help me...
Exception in thread "main" java.lang.ClassNotFoundException: Hello
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
at New.main(New.java:21)
public class New
public static void main(String[] args)
throws Exception
URL u = new URL("http" , "www.javageeks.com",
"/SSJ/examples/");
URLClassLoader ucl = new URLClassLoader(new URL[] { u });
Object obj =
ucl.loadClass("Hello").newInstance();

Answer 1

It appears that the "Hello" class has disappeared from the URL you were trying to get it from. I put a Hello class out at jroots.org, if you use the line
URL u = new URL("http://www.jroots.org");to build your URL and leave the rest of your code as is then you should get some success, the class has one method, getMessage(), that returns a string. You can cast your obj object to be a Hello object and call that method as:
Hello newClass = (Hello)obj;
System.out.println(newClass.getMessage());Hope that helped.
Lee