class filter{

     public String name(){

         return getClass().getSimpleName();

         }

      public String process(String s){

         return s;

 }

 class filter1 extends filter{

     public filter1(){

         print("I'm filter1");

     }

 }

 class filter2 extens filter{

     public filter2(){

         print("I'm filter2");

     }

 }

 interface processer{

     Object process(Object item);

 }

 class filteradapter implements processer{

         filter f;

         filteradapter(filter f){

             this.f = f;

         }

         public Object pocess(Object item){

             f.process((String)item);

             }

 }

 public class coupling{

     public void process(processer p, String s){

         p.process(s);

         }

     public static void main(String[] args){

         String s = "learing";

         process(new filteradapter(new filter1()), s);

         process(new filteradapter(new filter2()), s);

     }

 }

 I'm filter1

 learning

 I'm filter2

 learning