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Groups > comp.lang.java.programmer > #34455

Re: How to extend an array

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On Wednesday, June 1, 2016 at 5:07:55 PM UTC-4, Robert Klemme wrote:
> After reading the thread it seems you might want parallel inheritance 
> hierarchies like this:

I've never used that syntax before.  So if we want to implement a second set of extended interfaces like that we just add it into that block, then every reference needs another "?" ?


import java.util.ArrayList;
import java.util.List;

import javax.swing.Icon;

public class TestStatic3 {

     public static void main(final String[] args) {
          final BaseClass bc = new BaseClass();
          bc.addListener(new BaseListener() {

               @Override
               public void fast(final BaseClass<?, ?> o) {
                    System.out.println("simple bc");
               }

          });
          final DerivedClass dc = new DerivedClass();
          dc.addListener(new DerivedListener() {

               @Override
               public void fast(final BaseClass<?, ?> o) {
                    System.out.println("simple dc");
               }

               @Override
               public void superFast(final DerivedClass<?, ?> o) {
                    System.out.println("more complex dc");
               }

          });
          bc.notifyFast();
          dc.notifyFast();
          dc.notifySuperFast();
          System.out.println("done");
     }

     public static interface BaseListener {

          void fast(final BaseClass<?, ?> o);
     }

     public static class BaseClass<L extends BaseListener, I extends Icon> {

          private final List<L> listeners = new ArrayList<>();

          protected List<L> getListeners() {
               return listeners;
          }

          public void addListener(final L listener) {
               getListeners().add(listener);
          }

          public void notifyFast() {
               for (final L listener : getListeners()) {
                    listener.fast(this);
               }
          }
     }

     public static interface DerivedListener extends BaseListener {

          void superFast(final DerivedClass<?, ?> o);
     }
     
     public static interface CustomIcon extends Icon {
          
     }

     public static class DerivedClass<L extends DerivedListener, I extends CustomIcon> extends BaseClass<L, I> {

          public void notifySuperFast() {
               for (final L listener : getListeners()) {
                    listener.superFast(this);
               }
          }
     }
}

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Thread

How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-05-31 07:52 -0700
  Re: How to extend an array Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-31 11:52 -0400
    Re: How to extend an array Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-31 11:56 -0400
      Re: How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-05-31 09:19 -0700
        Re: How to extend an array Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-31 14:01 -0400
    Re: How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-05-31 09:09 -0700
      Re: How to extend an array Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-31 14:11 -0400
        Re: How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-05-31 11:25 -0700
          Re: How to extend an array Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-31 17:01 -0400
            Re: How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-06-01 04:57 -0700
  Re: How to extend an array Roedy Green <inquiry@mindprod.com> - 2016-05-31 21:56 -0700
    Re: How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-06-01 04:49 -0700
  Re: How to extend an array Robert Klemme <shortcutter@googlemail.com> - 2016-06-01 23:07 +0200
    Re: How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-06-03 05:38 -0700
      Re: How to extend an array Robert Klemme <shortcutter@googlemail.com> - 2016-06-04 19:17 +0200
    Re: How to extend an array Eric Douglas <e.d.programmer@gmail.com> - 2016-06-03 08:52 -0700

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