Saturday, February 28, 2009 10:54 AM | rahel luethy | 0 comment(s)

rahel needs

yet another google meme:

1. rahel needs at least € 60.000.
2. rahel needs to go.
3. rahel needs to be added to this ID card.
4. rahel needs your help to find hillel a home.
5. rahel needs to undertake an effort by herself.
6. rahel needs some soul balm.
7. rahel needs to answer the question: why are computer filters important and how are they going to work.
8. rahel needs to seriously get a brain.
9. rahel needs to feel she has been punished to rid herself of guilt.
10. rahel needs a room view profile.

Wednesday, February 04, 2009 4:19 PM | rahel luethy | 1 comment(s)

generified

one of the java language features which i personally discovered quite late and use only very rarely, but which maybe still is a good addition to any developer's toolbox: the possibility to specify multiple bounds for a type parameter via the T extends T1 & T2 ... & Tn syntax.

a simple example:

abstract class GenericDialog<T extends JPanel & Disposable> ... { private final T panel; public GenericDialog(Window owner, String title) { super(owner, title); panel = createPanel(); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { panel.dispose(); } @Override public void windowClosed(WindowEvent e) { panel.dispose(); } }); getContentPane().add(panel, BorderLayout.CENTER); } public abstract T createPanel(); }

instead of typing the dialog to e.g. a DisposablePanel class, we use multiple bounds to combine the two roles dynamically (and thus keep the class hierarchy cleaner).