Re: Code Included: Freeze column

From:
Lew <lewbloch@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Fri, 31 May 2013 12:37:40 -0700 (PDT)
Message-ID:
<d45301ee-8f68-47b7-9a47-e8a1123ed33e@googlegroups.com>
Haircuts Are Important wrote:

Lew wrote:

Haircuts Are Important wrote:

public class ModelWithScrollbar extends AbstractTableModel{
   static public List<String> columnNames = new ArrayList();
   static public List<List> data = new ArrayList();

   {//annonymous [sic] class


There is no anonymous class here. Why the comment?

 

       for (int i = 0;i < 90; i++){
          columnNames.add(" ");
       }
   }

 
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.
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
construct.

That means that every instance of that class, should there ever be more
than one, will add another 90 items to the 'columnNames' collection, result=
ing
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"
and "instance initializer"), "class", "anonymous class", "static member".

--
LEw

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