Java's runtime discard of class type information seems a bit hassle to
work around,
preventing lot of intuitive usages.

T someMethod( Class<T> clazz, T t) {
  map.put(clazz, t);
  return  map.get(clazz);
}
works with passing in regular non-generic  classes, but not
with classes with a type argument.

Another example:

import java.util.Arrays;
import java.util.EventListener;

import javax.swing.event.EventListenerList;

public class Test
{
 EventListenerList list = new EventListenerList();

 Test()
 {
   MyListener<Integer> m1 = new MyListener<Integer>();
   MyListener<String> m2 = new MyListener<String>();

  // this does not work
  // list.add(MyListener<Integer>.class, new MyListener<Integer>());

  // so use this

   list.add(m1.getClass(), new MyListener<Integer>());
   list.add(m2.getClass(), new MyListener<Integer>());

  // Now how do I get just a list of Listeners that are have
  // the Integer type argument?
  // i.e.
  // MyListener<Integer>[] integerListeners = ??????

 }

 public static class MyListener<T> implements EventListener
 {
 }
}

Any comments or suggestions?

Thx