Unable to instantiate a class using classloader

i load a class using ClassLoader but i am not able to create an object of that class.Here is the code.What is the problem?Help

Cloader = new URLClassLoader(new URL[] {new File(binfolderurl).toURI().toURL()},ClassLoader.getSystemClassLoader)开发者_Go百科;

Thread.currentThread().setContextClassLoader(Cloader);

Class clss = Cloader.loadClass("Someclass");

Object myobj =  clss.newInstance();

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You should be getting an Exception, describing what did not work. Did you?

The most likely reason is the class not having a default (no-arg) constructor, or that constructor being not public.