interface Printer {
        public void print(String text);
    }
 
    class FilePrinter implements Printer {
        public void print(String text) {
           //append the text to a file
        }
    }
 
    class ScreenPrinter implements Printer {
        public void print(String text) {
           //write the text on the screen
        }
    }
 
    class SomeClass {
        public printSomething(Printer myPrinter) {
            myPrinter.print("Hello");
        }
    }

import javax.media;public class VideoApplet extends JApplet implements ControllerLsitener {Player player=null;
public void init(){URL mediaurl=new URL(getCodeBase()+"1.mpg")
player=Manager.createPlayer(mediaurl);}