Multiple datatypes in a list supporting generics in Java 1.5

Question

How to support multiple datatypes when defining generic types for a list?
Thanks

Answer 1

... using <?> instead.Try adding something in such a List.Hey I'm just saying what the Sun Generics tutorialadvises...
The tutorial probably meant to use the <?> in methods
like this one for example:
    public static void
display(java.util.Collection<?> c) {
for(Object o : c) {
System.out.println(o);
}Because you cannot do this:
java.util.Collection<?> c = new
java.util.ArrayList<String>();
c.add("a String");
And because you cannot do this:
java.util.Collection<Object> c = new java.util.ArrayList<String>();but of course you can do this:
java.util.Collection<Object> c = new java.util.ArrayList<Object>();-Puce