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Subject: Re: Code Included: Freeze column
From: Lew <lewbloch@gmail.com>
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Xref: csiph.com comp.lang.java.programmer:24213

Haircuts Are Important wrote:
>Lew wrote:
>> Haircuts Are Important wrote:
>>> public class ModelWithScrollbar extends AbstractTableModel{
> > > =A0 =A0static public List<String> columnNames =3D new ArrayList();
> > > =A0 =A0static public List<List> data =3D new ArrayList();
> >
> > > =A0 =A0{//annonymous [sic] class
> >
> > There is no anonymous class here. Why the comment?
>=20
> > > =A0 =A0 =A0 =A0for (int i =3D 0;i < 90; i++){
> > > =A0 =A0 =A0 =A0 =A0 columnNames.add(" ");
> > > =A0 =A0 =A0 =A0}
> > > =A0 =A0}
>=20
> If it's not an annonymous [sic] class what is it called.

If by "it" you mean the block with the 'for' loop in it, that is an initial=
izer.=20
It is not any kind of class, let alone an anonymous one.

It is also a bug. You are using an instance initializer to initialize a sta=
tic=20
construct.

That means that every instance of that class, should there ever be more=20
than one, will add another 90 items to the 'columnNames' collection, result=
ing=20
in a total size in excess of 90.

It is usually a bad idea to initialize a static structure in an instance co=
ntext.

Study the following terms to be clear on these matters: "initializer" (both=
 "static initializer"=20
and "instance initializer"), "class", "anonymous class", "static member".

--=20
LEw