How to use custom class loader ?

Extend your class with ClassLoader and override method findClass()

class CustomClassLoader extends ClassLoader {

    String host;

    int port;

    public Class findClass(String name) {

       byte[] b = loadClassData(name);

       return defineClass(name, b, 0, b.length);

    }

    private byte[] loadClassData(String name) {

       // load the class data from the connection

    }

 }

To load your class

Class r = new CustomClassLoader().findClass("com.genius.MyClass");

- OR -

Class.forName("com.genius.MyClass", true, new CustomClassLoader());