Conding convention - Annonymus classes or "composition"?

General
1

Are there any test or suggestions in coding convention for components in Vaadin? I see two choides - simple “composition” approach (with additional block to make it more readable and narrow some variables scope):


                this.cityCombo = new ComboBox();
                {
                    this.cityCombo.setWidth("100%");
                    this.cityCombo.setFilteringMode(AbstractSelect.Filtering.FILTERINGMODE_STARTSWITH);
                }

and the annonymus-inner-class approach which is more readable and easy, but generates lots of inner classes


                this.cityCombo = new ComboBox() {
                {
                    setWidth("100%");
                    setFilteringMode(AbstractSelect.Filtering.FILTERINGMODE_STARTSWITH);
                }};

I like the second one as it is very expressive, but I don’t know if making lots of inner classes is a good idea.

What are your opinions ?

2

If you use a lot of anonymous classes, you’ll have hell dealing with serialization if you ever need that (clouds like it, Eclipse likes it, etc).

There might be some other issues as well.