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From: Andreas Leitgeb <avl@logic.at>
Newsgroups: comp.lang.java.programmer
Subject: Re: Where is the source?
Date: Fri, 3 Nov 2017 13:45:25 -0000 (UTC)
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Eric Douglas <e.d.programmer@gmail.com> wrote:
> I have source attached, using the file
> C:\Program Files\Java\jdk1.8.0_144\src.zip
> This gives me the source for JTable, which calls SwingUtilities2, which says it doesn't have source.

Well, seems like Oracle's src.zip just isn't complete.
In the hope that openjdk's and Oracle's version of that file aren't
all that different:

    public static int convertColumnIndexToModel(TableColumnModel cm,
                                                int viewColumnIndex) {
        if (viewColumnIndex < 0) {
            return viewColumnIndex;
        }
        return cm.getColumn(viewColumnIndex).getModelIndex();   // this is line 1988
    }

So, while your Table column model might not have been null, it
may not like the index that's being passed to its getColumn.