I want to define a method interceptor in a Java program in other words I want to have a behaviour which is executed at each method call. This application isn't executed in an application server and therefore I can't use the EJB around invoke interceptors. I have found a nice Proxy API in the standard Java libraries but its limited because it needs an interface in the proxy creation:

 Foo f = (Foo) Proxy.newProxyInstance(Foo.class.getClassLoader(),
                                      new Class[] { Foo.class },
                                      handler);

Is there a similar API which doesn't force Foo.class to be declared as an interface?

java reflection dynamic-proxy
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