Yeah i had a problem with this java for a while!
On Sep 24, 5:23 pm, Paul Robinson <[EMAIL PROTECTED]> wrote:
> If you google for "java generics", the first few results give good links.
>
> There's a tutorial here:http://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf
>
> HTH
> Paul
>
> seven.reeds wrote:
> > Here is the java newbie again. Just when I was thinking I had the
> > vaugest handle on things up pops parameterized types. The GWT 1.5
> > Serializable docs say that the "@gwt.typeArgs" is depreciated in favor
> > of parameterized types. I'm not seeing a definative guide to using
> > them though.
>
> > In my case, in a 1.4 app I was using:
>
> > package edu.uiuc.itg.client;
>
> > import java.util.HashMap;
> > import java.util.Map;
>
> > public class QueryParameters
> > {
> > Map map = new HashMap();
>
> > public QueryParameters()
> > {
> > String search = getQueryString();
> > if ((search != null) && (search.length() > 0))
> > {
> > String[] nameValues = search.substring(1).split("&");
> > for (int i = 0; i < nameValues.length; i++)
> > {
> > String[] pair = nameValues[i].split("=");
> > map.put(pair[0], pair[1]);
> > }
> > }
> > }
> > ...
>
> > This is almost an exact copy of code found in these discussions for
> > getting access to query parameters. I do not recall if the sample
> > code used typeArgs but this worked as-is in 1.4.
>
> > I am now trying to move this to 1.5 and am told be Eclipse that
> > "HashMap is a raw type. References to generic type HashMap<K,V> should
> > be parameterized". Same thing for "Map".
>
> > I have seen one or two similar threads here but the magic seems to be
> > happening off-screen. It seems to me that the examples in the other
> > threds are still using typeArgs. I'm not seeing the difference.
>
> > Do you have pointers to simple explanations of what I should be doing
> > with parameterized types?
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