public class MyClass {
    public static void main(String args[]) {
        Base proxy = new Base() {
            public void print() {
                System.out.println("before print");
                super.print();
                System.out.println("after print");
            }
        };
    
        proxy.print();
        System.out.println(proxy.getClass());
        
    }
    
}

class Base {
    public void print() {
        System.out.println("hello, world");
    }
}