How can I sort Columns by Row values?

Question

There are [too] many examples online of how to sort the Rows of a JTable by Column values.

Currently I am doing this by implementing AbstractTableModel and overridding getColumnClass to return the actual class of the data. Then calling setAutoCreateRowSorter.

How can I sort the Columns in a JTable by Row values?

This is not a duplicate. The above question is about sorting Rows, I want to sort Columns. — AnnanFay
– AnnanFay, Commented Mar 14, 2012 at 21:20
hmm .. don't quite understand what you are after, but as far as I do it's not supported in core: rows and columns are not semantically exchangeable. There are frameworks which support pivot tables, maybe they can be used, either directly or for inspiration — kleopatra
– kleopatra, Commented Mar 15, 2012 at 12:24

mKorbel · Accepted Answer · 2012-03-14 21:55:36Z

5

1) extract all value from TableHeader to the shortable Array (could be method in AbstractTableModel)

2) loop inside array and call

TableColumn column = table.getColumnModel().moveColumn(columnIndex, newIndex);

3) for all methods that used Model v.s. View (and vice versa) is required add

table/model#convertXxxIndexToXxx

4) for reset you have to create method in AbstractTableModel by calling

fireTableDataChanged(); or fireTableStructureChanged(); // not sure in this case

5) notice about above two fireTableXxxXxx

This can be a problem if you have added any custom renderers or editor to 
the table as you would lose them (by @camickr)

answered Mar 14, 2012 at 21:55

mKorbel

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Jason Huntley · Accepted Answer · 2012-03-14 21:43:28Z

0

Just define and set the RowSorter on your JTable. Here's a simple tutorial:

http://docs.oracle.com/javase/tutorial/uiswing/components/table.html#sorting

answered Mar 14, 2012 at 21:43

Jason Huntley

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1 Comment

AnnanFay Over a year ago

I want to sort the Columns not the Rows. RowSorters sort the rows.

Jakub Zaverka · Accepted Answer · 2012-03-14 21:18:03Z

-1

You can sort the values by clicking on a column header, if that's what you're asking.

answered Mar 14, 2012 at 21:18

Jakub Zaverka

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3 Comments

AnnanFay Over a year ago

I want to sort the Columns. When you click on the header it sorts the Rows.

Jakub Zaverka Over a year ago

I think there is no built-in function for that. You should sort by yourself, obtain the indexes and reset the column positions.

Jakub Zaverka Over a year ago

You can probably achieve that by implementing a hacked version of TableModel.

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