Class.cast(..) and Generics - a powerful combination
Saturday, July 12th, 2008
As you know when it comes to casting a la Java 1.4 a developer will have to write, typically, something like this:
Object a = "iron man";
String b = (String)a;
Well, there is nothing wrong with this code. However, it is not pretty :). With Java 5.0 the casting mechanism is more explicit and nicer. [...]
Do you need to cache your objects?
Wednesday, May 14th, 2008
I’ve found the Cache Management Pattern very useful in more than a couple of projects that needed a simple caching mechanism. Now that we have Generics at our disposal, I think this pattern deserves a tiny change. Something like a generic structure or code that we can follow or use every time we need to [...]
No more downcasting via “Recursive Bounds”
Sunday, May 4th, 2008
I recently coded a fairly tiny application that made use of the MVC pattern. One of the things that I noticed while I was writing it was that I was down-casting a lot. Imagine something like this:
Example
// main type
interface Model {
void someMethod();
}
// implementation
class Mixer implements Model {
public void anotherMethod(){
[...]