RFR: 6292135: DefaultTableModel.setColumnIdentifiers() Clears JTable Row Heights [v3]

[Tejesh R]

On Fri, 12 Dec 2025 07:40:02 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> Calling `DefaultTableModel.setColumnIdentifiers()` resizes the row height of the table to default row height (16) even if the row height is changed to something other than the default using `JTable.setRowHeight(row, height).` 
>> The spec of `DefaultTableModel.setColumnIdentifiers()` https://docs.oracle.com/en/java/javase/24/docs/api/java.desktop/javax/swing/table/DefaultTableModel.html#setColumnIdentifiers(java.lang.Object[]) says that it
>> `replaces the column identifiers in the model`, that is, the header field of the column is changed to the passed identifier and nowhere it is mentioned that row height would be changed.
>> 
>> The issue happens because calling `DefaultTableModel.setColumnIdentifiers()` results in the firing of a `TableModelEvent` with HEADER_ROW event and JTable resets the `rowModel` for it irrespective of what the event is.
>> Fix is to not reset the `rowModel` to keep the set rowHeight intact for HEADER_ROW event
>> 
>> No other issue observed with CI with this fix..
>
> Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Test fix

Marked as reviewed by tr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28529#pullrequestreview-3570677894