Creating a Proxy Object

 public interface MyInterface {
   void method();
 }
     
 public class MyInterfaceImpl implements MyInterface {
   public void method() {
   }
 }
     
 public class ProxyClass implements InvocationHandler {
   Object obj;
   public ProxyClass(Object o) {
     obj = o;
   }
         
   public Object invoke(Object proxy, Method m, 
     Object[] args) throws Throwable {
       Object result = null;
       try {
         // do something before the method is called
         result = m.invoke(obj, args);
       } catch (InvocationTargetException e) {
       } catch (Exception e) {
       } finally {
       // do something after the method is called
       }
       return result;
       }
 }
     
 // This fragment creates a proxy for a 
 // MyInterface object.
 MyInterface myintf = 
   (MyInterface)Proxy.newProxyInstance(
 MyInterface.class.getClassLoader(), 
   new Class[]{MyInterface.class}, 
   new ProxyClass(new MyInterfaceImpl()));
    
 // Invoke the method
 myintf.method();